Date   

Re: Grundig G8 With and Without Homemade Ferrite Loop Antenna

satya@...
 

Hi Brian:

Looks like you have a Quantum Stick for free! Perhaps even better, in
that the Quantum Stick varies in its effectiveness with different radios,
and it doesn't seem to work well with the flat ferrites in the G8 and Eton
e100. So, your set-up is apparently much more compatible with these
radios (and more fun to use, ya?). I suspect that the nice long coil has
something to do with it...

Kevin S
Bainbridge Island, WA

I took a couple of pictures of my G8 to show how my crystal set front-end
works as a loop antenna. The crystal set is not connected to my 75'
outdoor antenna. I simply shorted the antenna and ground connections on
the antenna board of the set.

The station being used for the comparison is 570 KlIF in Dallas, TX. I
live 200 miles away from KLIF's transmitter. It is a 5000 watt regional
station (directional day and night), and I get a very weak signal from
KLIF on my better radios.

This was done this afternoon. I had to take the pictures without flash,
as the flash washed out the display on the G8 so the signal meters
wouldn't show up in the pictures.

The first picture shows the signal meters on my G8 with the loop antenna
coupled to the radio.
http://i711.photobucket.com/albums/ww119/scooby214/g8withloopant.jpg

The second picture shows the signal meters on my G8 without using the loop
antenna.
http://i711.photobucket.com/albums/ww119/scooby214/g8withoutloopant.jpg

It is amazing how well a basic loop can work. The coil made with 175/46
Litz wound on a 3/8" ferrite core. It is about 240 uh. The air variable
capacitor is a 381 pf that you commonly see used with crystal radios.
(The smaller vertical coil, measuring about 100 uh, is not used when
operating this as a loop antenna. It allows the crystal set to tune the
lower end of the MW band.)

Brian


Grundig G8 With and Without Homemade Ferrite Loop Antenna

mr.decker
 

I took a couple of pictures of my G8 to show how my crystal set front-end works as a loop antenna. The crystal set is not connected to my 75' outdoor antenna. I simply shorted the antenna and ground connections on the antenna board of the set.

The station being used for the comparison is 570 KlIF in Dallas, TX. I live 200 miles away from KLIF's transmitter. It is a 5000 watt regional station (directional day and night), and I get a very weak signal from KLIF on my better radios.

This was done this afternoon. I had to take the pictures without flash, as the flash washed out the display on the G8 so the signal meters wouldn't show up in the pictures.

The first picture shows the signal meters on my G8 with the loop antenna coupled to the radio.
http://i711.photobucket.com/albums/ww119/scooby214/g8withloopant.jpg

The second picture shows the signal meters on my G8 without using the loop antenna.
http://i711.photobucket.com/albums/ww119/scooby214/g8withoutloopant.jpg

It is amazing how well a basic loop can work. The coil made with 175/46 Litz wound on a 3/8" ferrite core. It is about 240 uh. The air variable capacitor is a 381 pf that you commonly see used with crystal radios. (The smaller vertical coil, measuring about 100 uh, is not used when operating this as a loop antenna. It allows the crystal set to tune the lower end of the MW band.)

Brian


Re: MTM Air Core Loop Review now in the ULR Library

mr.decker
 

After reading this post, it dawned on me that I have a good trick that I use
with one of my crystal radio sets to boost reception on a transistor radio.
Most of my crystal sets are built on two separate boards (like Dave Schmarder
does with his higher performance sets). I have one in particular that I built
using Litz wrapped ferrite coils. I use only the antenna section of the set. I
short the antenna and ground connection, and then use the antenna as an
inductively coupled antenna booster. I simply place my transistor radio up
against the ferrite coil of the crystal radio's front end section and carefully
tune the crystal set's variable cap to peak the signal. I can also use this as
a wave trap to block interference from an adjacent local channel.

A side benefit is that I can connect my 75' outdoor wire to the crystal set
front-end, and in effect inductively couple the wire to the transistor radio.

I see the greatest effect with my Degen 1102, though it also helps with the G8.
It is neat to watch the signal meters on the G8 jump up when I couple the radio
to the crystal set. Some of my larger transistor radios, such as my Panasonic
888 don't get as much of a boost with the crystal set.

Here is a picture of the crystal set I use for this setup. I have better
crystal sets, but the design of this one allows me to easily couple it to a
transistor radio.

http://i711.photobucket.com/albums/ww119/scooby214/CrystalRadioSpring20091.jpg

The section on the left is the front-end of the set. I don't use the detector
board at all with this setup. You can also see my homemade 10k ohm piezo
headphones that really help with crystal radio DX. (Dave Schmarder came up with
the idea for the piezo headphones.)

Here is another picture. This one shows two of my better crystal sets, plus an inline wave trap.

http://i711.photobucket.com/albums/ww119/scooby214/IMG_2057.jpg

Brian

--- In ultralightdx@yahoogroups.com, "John H. Bryant" <bjohnorcas@...> wrote:

Jay Allen's recent note about his review of the MTM Loop Kit, then
residing on the excellent radiointel site was particularly welcome as
we begin to gear up (pun intended) for the Fall Season. The MTM
Scientific Loop is a handy kit approach to a traditional indoor
passive loop using a design that has served the hobby well since the
dawn of radio. Since its 17" x 17" capture area is CONSIDERABLY
larger than the commercial Select-a-Tenna and its more modern
competitors, the MTM loop should run rings around those designs.

With Jay's permission, I've created a slightly abridged version of
that review, with reduced-size photographs in PDF format and uploaded
it to the ULR Libraries in our Files section and at dxer.ca The
review is in the Antenna section of the Library at both places and
contains links to the original article and to the kit manufacturer.
Many thanks to author Jay Allen for this addition to our library.

Some DXers may wish to wait another couple of weeks before committing
to a particular air core design. Gary DeBock's upcoming article
series will document designs that are somewhat more technically
advanced (ease of tuning to peak, weather-proof qualities, etc.) than
traditional designs like the MTM. His two foot table-top design
should make a good second option to consider for your antenna choice.

Also, please note that I have slightly altered the Antennas and
Equipment section here at the ultralightdx Files site. There are now
two folders, "Air Core Antennas" and "Ferrite Rod Antennas" to help
you find information. Articles addressing both types of antennas or
other subjects remain in the main Antenna and Equipment section.

Enjoy!

John Bryant
Moderator
ultralightdx


Re: future of Mexican AM bleak ?

Paul Shaffer <dxrx@...>
 

I note the US AM Radio response. IHO the US Gummint has done a disservice to the general population by allowing too few network owners. Jeez Louise. I mean most nights I get 10-12 stations (7 are 50kW) b-casting Coast2Coast (C2C). I mean these guys are really not doing anyone on the E Coast US any good. Most any decent radio is simply overloaded.

I agree on curtailing network b-cast times. 5AM to midnite is plenty. About the only stuff worthwhile is over-nite news like WCBS, WBBM, and the former (2006) WTOP. I'm tired of network.... lets have local production at local power.


MTM Air Core Loop Review now in the ULR Library

John H. Bryant <bjohnorcas@...>
 

Jay Allen's recent note about his review of the MTM Loop Kit, then residing on the excellent radiointel site was particularly welcome as we begin to gear up (pun intended) for the Fall Season. The MTM Scientific Loop is a handy kit approach to a traditional indoor passive loop using a design that has served the hobby well since the dawn of radio. Since its 17" x 17" capture area is CONSIDERABLY larger than the commercial Select-a-Tenna and its more modern competitors, the MTM loop should run rings around those designs.

With Jay's permission, I've created a slightly abridged version of that review, with reduced-size photographs in PDF format and uploaded it to the ULR Libraries in our Files section and at dxer.ca The review is in the Antenna section of the Library at both places and contains links to the original article and to the kit manufacturer. Many thanks to author Jay Allen for this addition to our library.

Some DXers may wish to wait another couple of weeks before committing to a particular air core design. Gary DeBock's upcoming article series will document designs that are somewhat more technically advanced (ease of tuning to peak, weather-proof qualities, etc.) than traditional designs like the MTM. His two foot table-top design should make a good second option to consider for your antenna choice.

Also, please note that I have slightly altered the Antennas and Equipment section here at the ultralightdx Files site. There are now two folders, "Air Core Antennas" and "Ferrite Rod Antennas" to help you find information. Articles addressing both types of antennas or other subjects remain in the main Antenna and Equipment section.

Enjoy!

John Bryant
Moderator
ultralightdx


Approaching our 300th Member!

John H. Bryant <bjohnorcas@...>
 

A hearty welcome to our latest flurry of members! We are getting very close to our 300th member!!!!

For those of you who have signed up recently, please be sure to check out the ULR Library that now houses over 70 articles about this fun-filled niche of the radio hobbies. We strongly recommend that you peruse the Introduction to Ultralight DXing that is the lead article in the Library. It will reduce the learning curve quite a bit and direct you to the most important subject areas in the Library. You can find the ULR Library in the Files section of DXer.ca, or in our own Files section here at ultralightdx. We also maintain an extensive Photos section here that is definitely worth browsing. The easiest way to reach either section here is to simply click on the appropriate link at the bottom of any ultralightdx message.

Lastly, to all of our newer members. WELCOME ABOARD!

John Bryant
Moderator
Ultralightdx


Re: future of Mexican AM bleak ?

bbwrwy
 

First, let me say I've never considered Popular Communications a good source of information. But I have read the current issue which didn't have much to contribute. It devoted more words to the history of Mexican broadcasting than the present situation.

Second, the plan to convert Mexican AM stations to FM has been around for awhile. Yet, as far I hear it hasn't much affected the number of Mexican stations broadcasting.

The future of AM is bleak worldwide. Eventually it will as extinct as the Dodo bird. It's part of the world's evolutionary cycles. Most likely it will outlast the majority reading this. I say enjoy it while you can. For now there are still lots of Mexican AM stations to log and enjoy.

Centuries from now an archeologist will find a radio log book buried in a dig somewhere igniting a controversy about what it means to humankind. At least I hope so.

Best wishes and do some DXing this weekend.

Richard Allen
36°22'51"N / 97°26'35"W
(near Perry OK USA)
Sony SRF-T615 & Etón E100 (stock & barefoot)
WiNRADiO G313e & ICOM R75


Re: Trafind China e mail response

fm104rockinstereo
 

Re DPmega, same here. Recommended. 1 week to get to Aus.

Leigh

--- In ultralightdx@yahoogroups.com, "mr.decker" <mr.decker@...> wrote:

I've had good success with both sellers as well. I mentioned it to say that the ecrater seller seems to be trying hard to provide good service.

I did have one problem transaction with Liypn last year. I had ordered a Redsun RP2100. After a month had passed with no radio, I contacted Liypn. Ends up the radio was out of stock and Liypn didn't know it. It appears that Liypn didn't actually have the radios he sells with him, and the agent that actually did the shipping failed to let him know that the RP2100 was out of stock. Liypn did refund the money and was very pleasant to work with. I would purchase from him again. I never did get around to ordering another RP2100 when they were back in stock, as I decided that I have enough large portables (mostly vintage Panasonics and Sonys).

Brian


Re: future of Mexican AM bleak ?

Carl DeWhitt
 

--- It would help also if we did not have the 24/7 operations.The FCC should re institute the Monday morning silent period or pick another day for a silent period for stations.Some stations should have a silent period each day,in my opinion.
73,
Carl DeWhitt
Maryville , Tn.
In ultralightdx@yahoogroups.com, "Carl DeWhitt" <carl_elissa@...> wrote:


--- If it was only in the U.S. ,i would certainly agree especially if we lost some nuisance stations in more heavily populated states and gained some new targets in places like the New England states,Delaware,Maryland,Oregon, Alaska and Hawaii.I especially do not like what the FCC did in placing stations from already over represented states in the "x" band.That should have been reserved for stations in the places i mentioned plus maybe some others like the more sparsely populated western states that are hard to hear east of the Mississippi.Of course we might gain some channels for dx outside the U.S. also.Also the channels that used to be designated Mexican or Canadian clear channels could use less U.S. interference on them. If the U.S. economic situation continues to go south,we may see some more stations go dark which may free up some frequencies that may have stations that are a pest to dxers in some parts of the country.That would be sad for us economically .But ,to paraphrase Rahm Immanuel ,"Dxers should never let a good crisis go to waste ".HI!HI !Not that i would want stations to go dark .I am just saying if they do,we dxers should take the opportunity to catch some dx previously unheard.
73,
Carl DeWhitt
Maryville ,Tn.
In ultralightdx@yahoogroups.com, "mediumwavedx" <mediumwavedx@> wrote:

Hi Carl and All,

Just a few thoughts here....something that has been on my mind lately as we see Canadian AM drying up, European AM, and now maybe Mexican AM....I have mixed feelings about the demise (let's call it a reduction) of AM radio stations around the world. Sitting here right now in the northeast US, I sometimes think it might be a good thing if we had a few less stations transmitting, and I mean particularly in the US. Maybe we could then actually hear some DX out beyond 1000 miles versus the RF and IBOC storm I am hearing now.

I know when I go out west to Arizona in the winter, distant DX catches seem easier to log because of the thinning out of the band. I often envy those guys like Gary Deacon of South Africa, and those in New Zealand or sparsely populated Australia and the wide open band they seem to enjoy. I picture what it might have been like in the 1920s before the bands got conjested and coast-to-coast DX seemed to be receivable.

Just a question here - and I'm not trying to play devil's advocate, but being very sincere - could this turn out to be a good thing if we had a few less AM stations, especially in the US?

Bill

--- In ultralightdx@yahoogroups.com, "Carl DeWhitt" <carl_elissa@> wrote:

In the InfoCentral column in the August 2009 Popular Communications,the following news item is on page 8:
Mexico Wants AM Stations to Move to FM
"Radio World reports that the Mexican government wants to give the majority of AM stations in the country the opportunity to migrate voluntarily to the FM band,subject to availability of frequencies .However,no FM frequencies have been awarded and the plan is bogged down in administrative complications .It,s unclear when it will move forward.According to SCT ,the agency that sets communications policy , a station that wished to move would have a year from the time of authorization to put an FM station on the air and another year to give up its AM frequency and turn in that license .It,s been predicted that the majority of AM broadcasters in Mexico will shutter operations on that band within five years.There is a total of 1580 radio stations in Mexico,854 are AM and 726 are FM ,according to the SCT ."
(Source :Radio Netherlands Media Network)
Let,s hope their predictions do not come true.But,just in case, we had better log as many Mexican AMers as we can before they are gone .We have seen this happen in Canada.I am sure i have missed logging some Canadian AM dx before it went off the air.


Re: future of Mexican AM bleak ?

Carl DeWhitt
 

--- If it was only in the U.S. ,i would certainly agree especially if we lost some nuisance stations in more heavily populated states and gained some new targets in places like the New England states,Delaware,Maryland,Oregon, Alaska and Hawaii.I especially do not like what the FCC did in placing stations from already over represented states in the "x" band.That should have been reserved for stations in the places i mentioned plus maybe some others like the more sparsely populated western states that are hard to hear east of the Mississippi.Of course we might gain some channels for dx outside the U.S. also.Also the channels that used to be designated Mexican or Canadian clear channels could use less U.S. interference on them. If the U.S. economic situation continues to go south,we may see some more stations go dark which may free up some frequencies that may have stations that are a pest to dxers in some parts of the country.That would be sad for us economically .But ,to paraphrase Rahm Immanuel ,"Dxers should never let a good crisis go to waste ".HI!HI !Not that i would want stations to go dark .I am just saying if they do,we dxers should take the opportunity to catch some dx previously unheard.
73,
Carl DeWhitt
Maryville ,Tn.
In ultralightdx@yahoogroups.com, "mediumwavedx" <mediumwavedx@...> wrote:


Hi Carl and All,

Just a few thoughts here....something that has been on my mind lately as we see Canadian AM drying up, European AM, and now maybe Mexican AM....I have mixed feelings about the demise (let's call it a reduction) of AM radio stations around the world. Sitting here right now in the northeast US, I sometimes think it might be a good thing if we had a few less stations transmitting, and I mean particularly in the US. Maybe we could then actually hear some DX out beyond 1000 miles versus the RF and IBOC storm I am hearing now.

I know when I go out west to Arizona in the winter, distant DX catches seem easier to log because of the thinning out of the band. I often envy those guys like Gary Deacon of South Africa, and those in New Zealand or sparsely populated Australia and the wide open band they seem to enjoy. I picture what it might have been like in the 1920s before the bands got conjested and coast-to-coast DX seemed to be receivable.

Just a question here - and I'm not trying to play devil's advocate, but being very sincere - could this turn out to be a good thing if we had a few less AM stations, especially in the US?

Bill

--- In ultralightdx@yahoogroups.com, "Carl DeWhitt" <carl_elissa@> wrote:

In the InfoCentral column in the August 2009 Popular Communications,the following news item is on page 8:
Mexico Wants AM Stations to Move to FM
"Radio World reports that the Mexican government wants to give the majority of AM stations in the country the opportunity to migrate voluntarily to the FM band,subject to availability of frequencies .However,no FM frequencies have been awarded and the plan is bogged down in administrative complications .It,s unclear when it will move forward.According to SCT ,the agency that sets communications policy , a station that wished to move would have a year from the time of authorization to put an FM station on the air and another year to give up its AM frequency and turn in that license .It,s been predicted that the majority of AM broadcasters in Mexico will shutter operations on that band within five years.There is a total of 1580 radio stations in Mexico,854 are AM and 726 are FM ,according to the SCT ."
(Source :Radio Netherlands Media Network)
Let,s hope their predictions do not come true.But,just in case, we had better log as many Mexican AMers as we can before they are gone .We have seen this happen in Canada.I am sure i have missed logging some Canadian AM dx before it went off the air.


Re: future of Mexican AM bleak ?

mr.decker
 

I think they should have kept the clear channel allocations. Between that and IBOC, I think the FCC has made the US AM band a mess.

Brian

--- In ultralightdx@yahoogroups.com, "mediumwavedx" <mediumwavedx@...> wrote:

Hi Carl and All,

Just a few thoughts here....something that has been on my mind lately as we see Canadian AM drying up, European AM, and now maybe Mexican AM....I have mixed feelings about the demise (let's call it a reduction) of AM radio stations around the world. Sitting here right now in the northeast US, I sometimes think it might be a good thing if we had a few less stations transmitting, and I mean particularly in the US. Maybe we could then actually hear some DX out beyond 1000 miles versus the RF and IBOC storm I am hearing now.

I know when I go out west to Arizona in the winter, distant DX catches seem easier to log because of the thinning out of the band. I often envy those guys like Gary Deacon of South Africa, and those in New Zealand or sparsely populated Australia and the wide open band they seem to enjoy. I picture what it might have been like in the 1920s before the bands got conjested and coast-to-coast DX seemed to be receivable.

Just a question here - and I'm not trying to play devil's advocate, but being very sincere - could this turn out to be a good thing if we had a few less AM stations, especially in the US?

Bill

--- In ultralightdx@yahoogroups.com, "Carl DeWhitt" <carl_elissa@> wrote:

In the InfoCentral column in the August 2009 Popular Communications,the following news item is on page 8:
Mexico Wants AM Stations to Move to FM
"Radio World reports that the Mexican government wants to give the majority of AM stations in the country the opportunity to migrate voluntarily to the FM band,subject to availability of frequencies .However,no FM frequencies have been awarded and the plan is bogged down in administrative complications .It,s unclear when it will move forward.According to SCT ,the agency that sets communications policy , a station that wished to move would have a year from the time of authorization to put an FM station on the air and another year to give up its AM frequency and turn in that license .It,s been predicted that the majority of AM broadcasters in Mexico will shutter operations on that band within five years.There is a total of 1580 radio stations in Mexico,854 are AM and 726 are FM ,according to the SCT ."
(Source :Radio Netherlands Media Network)
Let,s hope their predictions do not come true.But,just in case, we had better log as many Mexican AMers as we can before they are gone .We have seen this happen in Canada.I am sure i have missed logging some Canadian AM dx before it went off the air.


Re: Trafind China e mail response

mr.decker
 

I've had good success with both sellers as well. I mentioned it to say that the ecrater seller seems to be trying hard to provide good service.

I did have one problem transaction with Liypn last year. I had ordered a Redsun RP2100. After a month had passed with no radio, I contacted Liypn. Ends up the radio was out of stock and Liypn didn't know it. It appears that Liypn didn't actually have the radios he sells with him, and the agent that actually did the shipping failed to let him know that the RP2100 was out of stock. Liypn did refund the money and was very pleasant to work with. I would purchase from him again. I never did get around to ordering another RP2100 when they were back in stock, as I decided that I have enough large portables (mostly vintage Panasonics and Sonys).

Brian


Re: Trafind China e mail response

robert ross
 

Keith Rennie wrote:
 

Liypn and DPMega may not send shipping notifications but they both

ship promptly and are trustworthy ebay Sellers.  I have bought several

items from both of them and all went well.

Keith







Hi Guys.................

I concur with these comments......good service from both...and I did in fact receive shipping Details from DPMEGA for the last radio I purchased from them!!

Considering these things are all being shipped outta China....we are getting pretty good service from a far away land!! I wish some of the North American sellers were as thoughtful and conscientious about their dealings with us!!

Now......being that I am happy with all my Dealings with the Chinese Sellers of ULR's........all I need to do now is hear something New with the Multitude of  ULR's in my Stable!!! Stuck at 669 Heard....and going nowhere fast!! And yes.....I have been looking........ in spite of it being the summer Doldrums!!

73....ROB.

Robert S. Ross VA3SW
London, Ontario CANADA






Re: future of Mexican AM bleak ?

mediumwavedx
 

Hi Carl and All,

Just a few thoughts here....something that has been on my mind lately as we see Canadian AM drying up, European AM, and now maybe Mexican AM....I have mixed feelings about the demise (let's call it a reduction) of AM radio stations around the world. Sitting here right now in the northeast US, I sometimes think it might be a good thing if we had a few less stations transmitting, and I mean particularly in the US. Maybe we could then actually hear some DX out beyond 1000 miles versus the RF and IBOC storm I am hearing now.

I know when I go out west to Arizona in the winter, distant DX catches seem easier to log because of the thinning out of the band. I often envy those guys like Gary Deacon of South Africa, and those in New Zealand or sparsely populated Australia and the wide open band they seem to enjoy. I picture what it might have been like in the 1920s before the bands got conjested and coast-to-coast DX seemed to be receivable.

Just a question here - and I'm not trying to play devil's advocate, but being very sincere - could this turn out to be a good thing if we had a few less AM stations, especially in the US?

Bill

--- In ultralightdx@yahoogroups.com, "Carl DeWhitt" <carl_elissa@...> wrote:

In the InfoCentral column in the August 2009 Popular Communications,the following news item is on page 8:
Mexico Wants AM Stations to Move to FM
"Radio World reports that the Mexican government wants to give the majority of AM stations in the country the opportunity to migrate voluntarily to the FM band,subject to availability of frequencies .However,no FM frequencies have been awarded and the plan is bogged down in administrative complications .It,s unclear when it will move forward.According to SCT ,the agency that sets communications policy , a station that wished to move would have a year from the time of authorization to put an FM station on the air and another year to give up its AM frequency and turn in that license .It,s been predicted that the majority of AM broadcasters in Mexico will shutter operations on that band within five years.There is a total of 1580 radio stations in Mexico,854 are AM and 726 are FM ,according to the SCT ."
(Source :Radio Netherlands Media Network)
Let,s hope their predictions do not come true.But,just in case, we had better log as many Mexican AMers as we can before they are gone .We have seen this happen in Canada.I am sure i have missed logging some Canadian AM dx before it went off the air.


Re: Trafind China e mail response

Keith Rennie <krennie@...>
 

Liypn and DPMega may not send shipping notifications but they both
ship promptly and are trustworthy ebay Sellers. I have bought several
items from both of them and all went well.
Keith

-----Original Message-----
From: ultralightdx@yahoogroups.com [mailto:ultralightdx@yahoogroups.com]On
Behalf Of mr.decker
Sent: August 6, 2009 10:34 AM
To: ultralightdx@yahoogroups.com
Subject: [ultralightdx] Re: Trafind China e mail response


I received my email reply from Trafind last night. His reply was that if you
buy from the Trafind China site, the cost would be $45.12 plus $13.95
shipping. (Sounds like the member who converted the GBP shipping price from
ebay got it right.

Less than $60 including shipping is a great price. If Trafind's customer
service is as good as what people have been getting from the ecrater.com
seller, than we have two good sources for the D96L.

The ecrater seller sent me two shipping and tracking notifications: one from
himself and one through PayPal. When I've ordered from DPMega and Liypn, I
never received shipping notifications.

Brian

--- In ultralightdx@yahoogroups.com <mailto:ultralightdx%40yahoogroups.com>
, "Carl DeWhitt" <carl_elissa@...> wrote:

They did not answer me on the shipping and handling.That has already been
answered by one of the group members ,though.They did say they accept Pay
Pal,bank transfer or Western Union payments.
Carl DeWhitt
Maryville ,Tn.


Re: Trafind China e mail response

mr.decker
 

I received my email reply from Trafind last night. His reply was that if you buy from the Trafind China site, the cost would be $45.12 plus $13.95 shipping. (Sounds like the member who converted the GBP shipping price from ebay got it right.

Less than $60 including shipping is a great price. If Trafind's customer service is as good as what people have been getting from the ecrater.com seller, than we have two good sources for the D96L.

The ecrater seller sent me two shipping and tracking notifications: one from himself and one through PayPal. When I've ordered from DPMega and Liypn, I never received shipping notifications.

Brian

--- In ultralightdx@yahoogroups.com, "Carl DeWhitt" <carl_elissa@...> wrote:

They did not answer me on the shipping and handling.That has already been answered by one of the group members ,though.They did say they accept Pay Pal,bank transfer or Western Union payments.
Carl DeWhitt
Maryville ,Tn.


future of Mexican AM bleak ?

Carl DeWhitt
 

In the InfoCentral column in the August 2009 Popular Communications,the following news item is on page 8:
Mexico Wants AM Stations to Move to FM
"Radio World reports that the Mexican government wants to give the majority of AM stations in the country the opportunity to migrate voluntarily to the FM band,subject to availability of frequencies .However,no FM frequencies have been awarded and the plan is bogged down in administrative complications .It,s unclear when it will move forward.According to SCT ,the agency that sets communications policy , a station that wished to move would have a year from the time of authorization to put an FM station on the air and another year to give up its AM frequency and turn in that license .It,s been predicted that the majority of AM broadcasters in Mexico will shutter operations on that band within five years.There is a total of 1580 radio stations in Mexico,854 are AM and 726 are FM ,according to the SCT ."
(Source :Radio Netherlands Media Network)
Let,s hope their predictions do not come true.But,just in case, we had better log as many Mexican AMers as we can before they are gone .We have seen this happen in Canada.I am sure i have missed logging some Canadian AM dx before it went off the air.


Trafind China e mail response

Carl DeWhitt
 

They did not answer me on the shipping and handling.That has already been answered by one of the group members ,though.They did say they accept Pay Pal,bank transfer or Western Union payments.
Carl DeWhitt
Maryville ,Tn.


Re: Air Core Loops Questions

Russ Edmunds <wb2bjh@...>
 

EVen the prototype 4' loop from the 1960's has capacitance switching. Mine won't tune below 630 without it. But that's a minimal inconvenience to address.

Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20id

FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
AM: Modified Sony ICF 2010 barefoot


--- On Wed, 8/5/09, D1028Gary@... wrote:

From: D1028Gary@...
Subject: Re: [ultralightdx] Air Core Loops Questions
To: ultralightdx@...
Date: Wednesday, August 5, 2009, 9:14 PM

 

Hello Guys,
 
After recently constructing five AM monster loops with sides longer than 4', I can confirm that none of these loops will tune the entire 530-1700 kHz band without some kind of capacitive switching (or jumper shorting) scheme.
 
The larger the loop, the more narrow the tuned frequency range becomes. Whereas a well-tuned 4' sided loop can barely tune the entire band, a  5' sided loop can only tune from about 530-1550 (or 650-1730, depending upon how many turns you wish to use).
 
The 5' 6" sided (8' diagonal) model taken to Grayland only tunes from 530-1480, but can tune up to the top of the band when one of the 6 turns is shorted out with a jumper.
 
The 9' 1" sided monster in my back yard can only tune from 630-1470 in its original 4-turn configuration, but it kind of compensates for this in providing a turbo boost to any radio whose frequency is within 15 kHz of its tuned position.
 
73, Gary  
 
 In a message dated 8/5/2009 5:16:26 P.M. Pacific Daylight Time, wb2bjh@yahoo. com writes:
 

Looks like there was good reason why the maximum loop size used was 4'.....

Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20id

FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
AM: Modified Sony ICF 2010 barefoot

--- On Wed, 8/5/09, satya@sounddsl. com wrote:

From: satya@sounddsl. com
Subject: Re: [ultralightdx] Air Core Loops Questions
To: ultralightdx@ yahoogroups. com
Date: Wednesday, August 5, 2009, 8:10 PM

 

While the wife was away today (sshhhh!), I built a 7x7 foot (essentially
the same as a6x8) loop in the living room. With 6 turns, it tuned to 530
khz, but the distributed capacitance was such that I couldn't tune above
1250 or so. Increasing the spacing allowed higher tuning, but the
inductance went way down and I couldn't tune the bottom of the band. So,
as I think Gary mentioned earlier, tough to make a monster loop like this
that will tune the whole band without switching.

At any rate, the gain was impressive, matching the theoretical 11 dB gain
over a crate loop. However, it was a good 10 dB or more less than the
active crate loop. Hooking the big loop up to the Q multiplier active
unit allowed it to once again pull ahead of the active create loop by
several dB. So, I am thinking that unless I am at the beach, a small
active passive loop is the way to go.

Kevin

> For whatever it may be worth, I finally got a chance to run the data on
> the 8' x 6' loop through a calculation program. I guessed at the spacing
> since I didn't recall what that had been specified as being. Using any
> spacing value in excess of 0.15 inches shouldn't tune the bottom of the
> band.
>
> My prior thought on the number of turns it would take turns out to be
> correct - 6.
>
> Because there are other variables, notably the wire size, which isn't in
> the calculator, the calculated results could be off by enough to allow for
> the loop tuning down to 530, as it apparently does.
>
>
> Russ Edmunds
> Blue Bell, PA ( 360' ASL )
> [15 mi NNW of Philadelphia]
> 40:08:45N; 75:16:04W, Grid FN20id
> <wb2bjh@yahoo. com>
> FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
> AM: Modified Sony ICF 2010 barefoot
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Re: FM antennas with the PL-300WT/G8

John H. Bryant <bjohnorcas@...>
 

Russ,

I'm just back from a DXpedition and haven't yet digested the excellent responses to my loop question, especially yours and Kevin's. Thanks in advance.  My ears pricked up with your mention of the G8 overloading.  I had not heard of anyone but me experiencing such..... It is the most bullet-proof radio of its size that I have ever used.  I did get it to overload - barely - by directly connecting it to the largest Conti Super Loop about which I know.... my 70' x 100' monster that is pointed right at 690 CBU (50 kW, excellent antenna/ground) in Vancouver, line-of-sight, over 20 miles of open, unobstructed, sea water. I did notice a bit of CBU programming superimposed on several other low band frequencies when CBU was playing a very slow piano solo that was sort of paced like the NBC chimes... ONE..... NOTE.... AT.... A .... TIME! I can't imagine a more bruising test for any radio, unless maybe if CBU had been  playing Buddy Holly's "Rave On!" My E100 is totally unusable when connected to that antenna here. I can and will be DXing with the G8 from here just as soon as the Asians start coming through in two or three weeks.

If you are concerned about the G8 overloading, don't be, unless you own a huge high gain antenna pointed right at a nearby 50 kW.... 

THANKS AGAIN, RUSS!

John Bryant
Orcas Island, WA, USA
Winradio G313e and various Ultralights
Wellbrook Phased Array + Superloops








At 03:46 AM 8/5/2009 -0700, you wrote:
 

I have only the SRF-59 and DT-200vx, neither of which have a whip. I can say that having tried an XDRF1HD, it is roughly on a par with my analog tuners. I say roughly because I made the comparisons in winter when there was no FM enhancement. The Sony heard everything the others did on the big antenna.

I ended up returning the Sony primarily because I found it wasn't going to hear as well as I'd hoped on an indorr antenna, and that it didn't ( contrary to several early users' claims ) do any better with adjacent channel IBOC than the tuners. I also found that it ran too hot for me to be comfortable leaving it running for hours on unattended recordings.

I've considered the G8 but I'm a bit wary of the reports of overload in strong signal areas.

Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20id

FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
AM: Modified Sony ICF 2010 barefoot

--- On Tue, 8/4/09, satya@... wrote:

From: satya@...
Subject: [ultralightdx] FM antennas with the PL-300WT/G8
To: ultralightdx@...
Date: Tuesday, August 4, 2009, 10:33 PM

 

Hey Russ:

> Russ Edmunds
> FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'

Couldn't help but notice your standard signature block. I have started FM
DXing on Ultralights, and are much impressed with the G8/PL-300WT. By
running a wire from the negative battery spring, and clipping another lead
to the retracted whip, one can hook up a 75-ohm external antenna with good
results.

Do you have a G8 or PL-300WT? If so, whaddayathink about trying this
sort of hook-up, and comparing the result with your Yamaha and/or Onkyo
tuners? I have found that the PL-300WT cannot keep up with the Sony
XDR-F1HD (but then again nothing probably can), but I would be curious how
competitive the PL-300WT/G8 is with your nice DX tuners? With 50 dB
adjacent selectivity, the DX can be pretty good.

Kevin S
Bainbridge Island, WA