Date   

Re: Read your message before it gets deleted!

Michael <michael.setaazul@...>
 

Did everybody get this typical email-address cloned msg ???
Once in a net, it will doubtless recur :-((

at and dot inserted by me

Michael UK

----- Original Message ---------------------------------------------------------------------

From: "carljhayfriends" <carljhayfriends a t y a h o o d o t com>
To: <ultralightdx@yahoogroups.com>
Sent: 24 February 2011 11:59
Subject: [ultralightdx] Read your message before it gets deleted!


Read your message left by Kelly before it gets deleted!
http://llkia.zoomshare d o t c o m/files/friend.h t m


NE Oregon ULR NDBs, Wednesday night

Steve Ratzlaff <steveratz@...>
 

Another night with fairly good conditions, favoring northeastern Canada. Two Quebec beacons heard, for a new 8th province. Static came up around 10:30 p.m. local and kept increasing until it was a problem even with the small receiving antenna. 353 LLD Hawaii was heard around 11p.m.; no sign of 391 DDP Puerto Rico this evening. 402 M3,SK has a non-standard 1020 Hz modulation but has a standard Canadian dash, though the dash occurs just before the ident (DBID) instead of the usual right after the ident (DAID)--a rather unique Canadian beacon. Both Quebec beacons started out as a faint DAID heard; both required sitting on them for about 10 minutes each but eventually faded up to reasonable copy. 222 total. (Trans-polar LWBC 189 Iceland at decent level around 0500 utc but not heard on a ULR or indoor antenna.) :)
Steve
NE Oregon
PL-380, Ferrite Sleeve Loop (8 x 5")

250 2J BC CAN 236 MI
379 ZEG AB CAN 573 MI
392 ML QC CAN 2228 MI
395 L7 SK CAN 746 MI
395 ULS KS 1017 MI
400 MDS SD 1025 MI
402 M3 SK CAN 570 MI
407 ZHU QC CAN 2128 MI
512 HMY OK 1307 MI


My First New Station Logged on a Sony T615

Kirk <kirk74601@...>
 

Well thanks to Rob Ross, I'm now the proud new owner of a Sony T615 receiver!! I've not put in a lot of listening time with it yet, but you can be assured I will as time goes by! Last night I logged my first new station using the T615 barefoot.

1580, XEVAB, Valle de Bravo, Estado de Mexico, 0900-0945+UTC, 2/23/11, vy challenging listening as there were TWO stations in SS here, both sounding LAm. This one played a variety of vcl mx w/ vy few anmts. I finally had a lucky sig peak during a clear "Super Stereo Miled" ID. Ranchera mx followed the ID til tune-out. ULR Sta #733, LAm Sta #139. This is one I never hrd in Houston.

73 to everyone!!

Kirk Allen
Ponca City, OK


ULR DX.......BEACONS.....2 NEW Beacons tonight.........

robert ross
 

Hi Guys:

Conditions not as good as last night..........Only managed to hear 2 new Beacons so far tonight.

RADIO USED...................TECSUN PL-380 ULR with Debock Frankensteiner 7.5 Inch Ferrite Antenna

ULR BEACON Log Totals are now...................72 Beacons Heard
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

73.................ROB VA3SW

Robert S. Ross
London, Ontario CANADA

***************************************************************************
273 ZV Sept. Isles, QUE. Feb/24/11 0240 UTC 500 Watts 864 MIles

432 IZN Lincolnton, NC Feb/24/11 0325 UTC 25 Watts 516 Miles

***************************************************************************


1590 WZRX test tone

bbwrwy
 

I checked 1590 kHz, at 2025 UTC, and "NewsPlus 1590", WZRX, Jackson MS, is again broadcasting a test tone. Expect to hear ABC News on the hour.

Their schedule shows they should be carrying the "Phil Valentine Show" to 0200-0600 UTC.

They were heard earlier broadcasting a Southern Mississippi University baseball game.

Good DX.

Richard.

Richard Allen
36°22'51"N / 97°26'35"W
(near Perry OK USA)


Re: size of litz wire for MW band

gmosherat
 

hmm.. I guess they edit out e-mail addresses. my e-mail provider is google.

Regards,
Gregory

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



Michael UK,

Contact me at gpsfool@... and I can send you some 40/44 Litz.

Regards,

Gregory

--- In ultralightdx@yahoogroups.com, "Michael" <michael.setaazul@> wrote:

For me, the Litz-issue is one the disincentives to experimentation.
Cost is a determinant issue. Litz is expensive. A longer,
thicker ferrite rod is currently unobtainable and would in any case
be very expensive. Neither do I have the real-estate for a beverage.
I may have to settle for more modest, uncompetitive uldx compromises.
I may well have suitable Litz in my junk-box, but have no way of assessing.
The suggested UK source of ferrite rods is known; but unfortunately
availability is delayed and length and diameter do not exceed what
I have in the junk-box and no way approach those available in the US.

Maybe my predestination is for homebrew shortwave - as long as it lasts.
I could, of course, build a big loop, but that would shout at my diminutive
SRF-59, which does not know that LW exits.

Michael UK


----- Original Message -------------------------------------------------------------------
From: "ferrite61" <dxrx@>
To: <ultralightdx@yahoogroups.com>
Sent: 23 February 2011 18:48
Subject: [ultralightdx] Re: size of litz wire for MW band


I would choose some thing "X"/46 as it is the right-sized strand of Litz wire for the AM-BCB. Litz wire that is "X"/44
is better suited for the NDB's (more precisely X/43 is ideal). Affordability is the key issue for most, as the price is
high compared to mamgnet wire (solid Cu).

Paul S. in CT


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

Which size litz wire works best for winding on a ferrite rod for MW (520-1710) band, 40/44, 100/44 or 175/46? I don't
have a meter for measuring inductance. Can anyone tell me approximately how many turns are required to get optimum
performance on a 3/8" X 4" ferrite rod?
Should the coil be centred on the antenna? I'm trying to replace the internal antenna on a PL380.

Thanks
Stew


Re: size of litz wire for MW band

gmosherat
 

Michael UK,

Contact me at gpsfool@gmail.com and I can send you some 40/44 Litz.

Regards,

Gregory

--- In ultralightdx@yahoogroups.com, "Michael" <michael.setaazul@...> wrote:

For me, the Litz-issue is one the disincentives to experimentation.
Cost is a determinant issue. Litz is expensive. A longer,
thicker ferrite rod is currently unobtainable and would in any case
be very expensive. Neither do I have the real-estate for a beverage.
I may have to settle for more modest, uncompetitive uldx compromises.
I may well have suitable Litz in my junk-box, but have no way of assessing.
The suggested UK source of ferrite rods is known; but unfortunately
availability is delayed and length and diameter do not exceed what
I have in the junk-box and no way approach those available in the US.

Maybe my predestination is for homebrew shortwave - as long as it lasts.
I could, of course, build a big loop, but that would shout at my diminutive
SRF-59, which does not know that LW exits.

Michael UK


----- Original Message -------------------------------------------------------------------
From: "ferrite61" <dxrx@...>
To: <ultralightdx@yahoogroups.com>
Sent: 23 February 2011 18:48
Subject: [ultralightdx] Re: size of litz wire for MW band


I would choose some thing "X"/46 as it is the right-sized strand of Litz wire for the AM-BCB. Litz wire that is "X"/44
is better suited for the NDB's (more precisely X/43 is ideal). Affordability is the key issue for most, as the price is
high compared to mamgnet wire (solid Cu).

Paul S. in CT


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

Which size litz wire works best for winding on a ferrite rod for MW (520-1710) band, 40/44, 100/44 or 175/46? I don't
have a meter for measuring inductance. Can anyone tell me approximately how many turns are required to get optimum
performance on a 3/8" X 4" ferrite rod?
Should the coil be centred on the antenna? I'm trying to replace the internal antenna on a PL380.

Thanks
Stew


ULR DX.........ONE NEW GRAVEYARDER @ Sunset tonight........

robert ross
 

Hi Guys:

Things have been a little slow here at Sunset lately, but tonight we squeezed out a New Graveyarder on 1230 Khz. Signal on this one was Great for such a Cluttered Frequency!! It is NEW for both the ULR and OVERALL LOGS!!

RADIO USED......................SONY SRF-T615 ULR Barefoot

ULR LOG TOTALS are now................915 Stations Heard
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

ULR GRAVEYARDER # 91 Heard
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

73.......................ROB VA3SW

Robert S. Ross
London, Ontario CANADA

**********************************************************************************
1230 WFAS White Plains, NEW YORK Feb/23/11 1656-1701 EST EE GOOD
Bee Gees Song...."Night Fever" @ 1656 EST Tune In. ID given by Male DJ as
"Westchester's Soft Favorites WFAS" @ 1659 EST. Soft Instrumental Music til 1700 EST and
another ID as "This is AM 1230 WFAS White Plains-Westchester...It's 5 O'Clock".
Into News on Hour.

NEW STATION ULR # 915 ULR GY # 91 1 KW
ROSS, ONT.
***********************************************************************************


Re: size of litz wire for MW band

Gary DeBock
 

Michael, Roy and Paul,

DXers desiring the best performance from loopsticks should not have the
attitude of "just use whatever is in the junkbox," and those promoting
such a concept certainly do not bring any credit upon themselves.

There have been very detailed tests run on loopsticks of different
Litz wire/ ferrite bar combinations on both MW and LW frequencies for
the benefit of the Ultralightdx group, and such information is
available upon request. For those desiring a very sensitive loopstick
suitable for MW-DXing with any Tecsun DSP receiver, a 7.5" loopstick
model is described in the file posted at
( http://www.mediafire.com/?yummxhqeyjy . This 40/44 Litz wire 300
uh single-coil model has provided outstanding DXing results for many
DXers, including Richard Allen of Oklahoma, who has used it to receive
multiple TP's and TA's with his PL-310.

Those with limited financial means will find that almost any 7.5"
loopstick can be constructed with a total parts outlay of less than
$25, and if that seems excessive, there is extra material available
here for any motivated DXer who wishes to give it a shot.

73, Gary DeBock (in Puyallup, WA, USA)

-----Original Message-----
From: Michael <michael.setaazul@btopenworld.com>
To: ultralightdx <ultralightdx@yahoogroups.com>
Sent: Wed, Feb 23, 2011 2:44 pm
Subject: Re: [ultralightdx] Re: size of litz wire for MW band

 
Paul, thanks again for your concise responses.
I guess the upshot for those of us limited to junkbox means is,
as you say, "what´s on hand" is better than not-affordable-new.
I imagine performance may be less impressive than
with a 10-foot ferrite with ultimate litz, but probably quite
enjoyable. Which is what it is all about - I trust.

Last questions (maybe):-

Single-layer or bunched-up winding?
Centre or offset on whatever ferrite?

I deduce from former postings that,
for any wire or litz used, single layer
on centre of ferrite would be best.

Or should I take up knitting instead???

Michael UK

----- Original Message
----------------------------------------------------------

From: "ferrite61" <dxrx@am3-radio.us>
To: <ultralightdx@yahoogroups.com>
Sent: 23 February 2011 22:19
Subject: [ultralightdx] Re: size of litz wire for MW band

I meant it pretty much the way i said it... better to use whats on
hand, than buying new. New cost a lot more.

Paul S. in CT

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

Thanks guys for all your help.
Paul are you saying that getting proper litz wire will not result
in much improvement over using a ferrite and coil
from an old junked radio or is it just that new litz wire costs so
much. I'm looking to make the PL380 as sensitive as
possible with an internal antenna.

Thanks
Stew

--- In ultralightdx@yahoogroups.com, "ferrite61" <dxrx@>
wrote:

In your case, take the fattest Litz wire on-hand and wrap 60
turns around your 3/8" diameter by 4" long stick.
Center the wire on the stick, and presume a winding length of 1.5".
This yields about 225 uH, just a little low for the
am-bcb. It will take 7 feet of wire including the connection. If your
piece of litz is longer, add 6-8 more turns
figuring 1.75" for the coil length. For 68 turns at 1.75" of winding
length the inductance increases to about 270 uH.
Having some litz, any litz in the junque-box, with a stick is
preferable to buying such. ;)

Paul S. in CT


Re: size of litz wire for MW band

ferrite61 <dxrx@...>
 

Single-layered and centered is the best option. In regards to my previous posts, if the coil length is shorter than i guessed, your inductance will increase. You would know this when the 60 turns is less than 1.5". That would allow a few more turns and stay within 1.5"... and get the higher uH that you need. Ideal would be if you had enough wire to wrap 70 turns in that 1.5".

Paul S. in CT

--- In ultralightdx@yahoogroups.com, "Michael" <michael.setaazul@...> wrote:

Paul, thanks again for your concise responses.
I guess the upshot for those of us limited to junkbox means is,
as you say, "what�s on hand" is better than not-affordable-new.
I imagine performance may be less impressive than
with a 10-foot ferrite with ultimate litz, but probably quite
enjoyable. Which is what it is all about - I trust.

Last questions (maybe):-

Single-layer or bunched-up winding?
Centre or offset on whatever ferrite?

I deduce from former postings that,
for any wire or litz used, single layer
on centre of ferrite would be best.

Or should I take up knitting instead???

Michael UK

----- Original Message ----------------------------------------------------------

From: "ferrite61" <dxrx@...>
To: <ultralightdx@yahoogroups.com>
Sent: 23 February 2011 22:19
Subject: [ultralightdx] Re: size of litz wire for MW band


I meant it pretty much the way i said it... better to use whats on hand, than buying new. New cost a lot more.

Paul S. in CT


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

Thanks guys for all your help.
Paul are you saying that getting proper litz wire will not result in much improvement over using a ferrite and coil
from an old junked radio or is it just that new litz wire costs so much. I'm looking to make the PL380 as sensitive as
possible with an internal antenna.

Thanks
Stew

--- In ultralightdx@yahoogroups.com, "ferrite61" <dxrx@> wrote:

In your case, take the fattest Litz wire on-hand and wrap 60 turns around your 3/8" diameter by 4" long stick.
Center the wire on the stick, and presume a winding length of 1.5". This yields about 225 uH, just a little low for the
am-bcb. It will take 7 feet of wire including the connection. If your piece of litz is longer, add 6-8 more turns
figuring 1.75" for the coil length. For 68 turns at 1.75" of winding length the inductance increases to about 270 uH.
Having some litz, any litz in the junque-box, with a stick is preferable to buying such. ;)

Paul S. in CT


Re: size of litz wire for MW band

Michael <michael.setaazul@...>
 

Paul, thanks again for your concise responses.
I guess the upshot for those of us limited to junkbox means is,
as you say, "whats on hand" is better than not-affordable-new.
I imagine performance may be less impressive than
with a 10-foot ferrite with ultimate litz, but probably quite
enjoyable. Which is what it is all about - I trust.

Last questions (maybe):-

Single-layer or bunched-up winding?
Centre or offset on whatever ferrite?

I deduce from former postings that,
for any wire or litz used, single layer
on centre of ferrite would be best.

Or should I take up knitting instead???

Michael UK

----- Original Message ----------------------------------------------------------

From: "ferrite61" <dxrx@am3-radio.us>
To: <ultralightdx@yahoogroups.com>
Sent: 23 February 2011 22:19
Subject: [ultralightdx] Re: size of litz wire for MW band


I meant it pretty much the way i said it... better to use whats on hand, than buying new. New cost a lot more.

Paul S. in CT


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

Thanks guys for all your help.
Paul are you saying that getting proper litz wire will not result in much improvement over using a ferrite and coil
from an old junked radio or is it just that new litz wire costs so much. I'm looking to make the PL380 as sensitive as
possible with an internal antenna.

Thanks
Stew

--- In ultralightdx@yahoogroups.com, "ferrite61" <dxrx@> wrote:

In your case, take the fattest Litz wire on-hand and wrap 60 turns around your 3/8" diameter by 4" long stick.
Center the wire on the stick, and presume a winding length of 1.5". This yields about 225 uH, just a little low for the
am-bcb. It will take 7 feet of wire including the connection. If your piece of litz is longer, add 6-8 more turns
figuring 1.75" for the coil length. For 68 turns at 1.75" of winding length the inductance increases to about 270 uH.
Having some litz, any litz in the junque-box, with a stick is preferable to buying such. ;)

Paul S. in CT


Re: new group member question

ferrite61 <dxrx@...>
 

For the purpose of this group, the G6 Aviator has not been accepted as an Ultralight, due to having SSB capability. I would choose either a PL-310 or PL-380 considering the return of the G6. Either save the extra money or buy an R-911 with a AN-200 passive-loop antenna (the model that looks like a "Q") for some cheap fun on MW. JMHO

Paul S. in CT

--- In ultralightdx@yahoogroups.com, Chris Storey <cap_cstorey@...> wrote:

I recently discovered this yahoo group, along with the DXCA website, and am beyond amazed!! I have found so much online here and on DXCA that my head is spinning wondering where to start. I would like to start with an external lopstick antenna and saw a few articles on external antennas… Gary’s 7.5� lopstick looks very interesting….. along with a few others….. I can’t decide which one I want to try and build first. While I am not new to antenna design and construction (25+ years ham), I am a bit confused by the discussion on this list about the 18� variable capacitor tuned Stormwise design. Which ferrite mix is the one that works best for LW and MW? I have read some reports here that the lower mu mix has worked well for them, and others that report their higher mu mix works better with the same design. Any tips?

I also recently replaced my Grundig YB-400PE (it lost all receive on LW/MW/SW) with a Grundig G6 Aviator, but I have to admit that the PL-380 looks extremely tempting. Anyone here use the G6 for LW/MW and could share their findings? Would the PL380 be a better choice (while I can still return the G6)? Then again, the PL360 mini with the 7.5� external bar looks very tempting too….. too many choices, too much fun!


Chris
KA6WNK
So. California


Re: size of litz wire for MW band

ferrite61 <dxrx@...>
 

I meant it pretty much the way i said it... better to use whats on hand, than buying new. New cost a lot more.

Paul S. in CT

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

Thanks guys for all your help.
Paul are you saying that getting proper litz wire will not result in much improvement over using a ferrite and coil from an old junked radio or is it just that new litz wire costs so much. I'm looking to make the PL380 as sensitive as possible with an internal antenna.

Thanks
Stew

--- In ultralightdx@yahoogroups.com, "ferrite61" <dxrx@> wrote:

In your case, take the fattest Litz wire on-hand and wrap 60 turns around your 3/8" diameter by 4" long stick. Center the wire on the stick, and presume a winding length of 1.5". This yields about 225 uH, just a little low for the am-bcb. It will take 7 feet of wire including the connection. If your piece of litz is longer, add 6-8 more turns figuring 1.75" for the coil length. For 68 turns at 1.75" of winding length the inductance increases to about 270 uH. Having some litz, any litz in the junque-box, with a stick is preferable to buying such. ;)

Paul S. in CT


--- In ultralightdx@yahoogroups.com, "Michael" <michael.setaazul@> wrote:

For me, the Litz-issue is one the disincentives to experimentation.
Cost is a determinant issue. Litz is expensive. A longer,
thicker ferrite rod is currently unobtainable and would in any case
be very expensive. Neither do I have the real-estate for a beverage.
I may have to settle for more modest, uncompetitive uldx compromises.
I may well have suitable Litz in my junk-box, but have no way of assessing.
The suggested UK source of ferrite rods is known; but unfortunately
availability is delayed and length and diameter do not exceed what
I have in the junk-box and no way approach those available in the US.

Maybe my predestination is for homebrew shortwave - as long as it lasts.
I could, of course, build a big loop, but that would shout at my diminutive
SRF-59, which does not know that LW exits.

Michael UK


----- Original Message -------------------------------------------------------------------
From: "ferrite61" <dxrx@>
To: <ultralightdx@yahoogroups.com>
Sent: 23 February 2011 18:48
Subject: [ultralightdx] Re: size of litz wire for MW band


I would choose some thing "X"/46 as it is the right-sized strand of Litz wire for the AM-BCB. Litz wire that is "X"/44
is better suited for the NDB's (more precisely X/43 is ideal). Affordability is the key issue for most, as the price is
high compared to mamgnet wire (solid Cu).

Paul S. in CT


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

Which size litz wire works best for winding on a ferrite rod for MW (520-1710) band, 40/44, 100/44 or 175/46? I don't
have a meter for measuring inductance. Can anyone tell me approximately how many turns are required to get optimum
performance on a 3/8" X 4" ferrite rod?
Should the coil be centred on the antenna? I'm trying to replace the internal antenna on a PL380.

Thanks
Stew


new group member question

Chris Storey <cap_cstorey@...>
 

I recently discovered this yahoo group, along with the DXCA website, and am beyond amazed!! I have found so much online here and on DXCA that my head is spinning wondering where to start. I would like to start with an external lopstick antenna and saw a few articles on external antennas… Gary’s 7.5” lopstick looks very interesting….. along with a few others….. I can’t decide which one I want to try and build first. While I am not new to antenna design and construction (25+ years ham), I am a bit confused by the discussion on this list about the 18” variable capacitor tuned Stormwise design. Which ferrite mix is the one that works best for LW and MW? I have read some reports here that the lower mu mix has worked well for them, and others that report their higher mu mix works better with the same design. Any tips?

 

 I also recently replaced my Grundig YB-400PE (it lost all receive on LW/MW/SW) with a Grundig G6 Aviator, but I have to admit that the PL-380 looks extremely tempting. Anyone here use the G6 for LW/MW and could share their findings? Would the PL380 be a better choice (while I can still return the G6)?  Then again, the PL360 mini with the 7.5” external bar looks very tempting too….. too many choices, too much fun!

 

 

Chris

KA6WNK

So. California

 


Re: size of litz wire for MW band

Roy <gstaples@...>
 

Thanks guys for all your help.
Paul are you saying that getting proper litz wire will not result in much improvement over using a ferrite and coil from an old junked radio or is it just that new litz wire costs so much. I'm looking to make the PL380 as sensitive as possible with an internal antenna.

Thanks
Stew

--- In ultralightdx@yahoogroups.com, "ferrite61" <dxrx@...> wrote:

In your case, take the fattest Litz wire on-hand and wrap 60 turns around your 3/8" diameter by 4" long stick. Center the wire on the stick, and presume a winding length of 1.5". This yields about 225 uH, just a little low for the am-bcb. It will take 7 feet of wire including the connection. If your piece of litz is longer, add 6-8 more turns figuring 1.75" for the coil length. For 68 turns at 1.75" of winding length the inductance increases to about 270 uH. Having some litz, any litz in the junque-box, with a stick is preferable to buying such. ;)

Paul S. in CT


--- In ultralightdx@yahoogroups.com, "Michael" <michael.setaazul@> wrote:

For me, the Litz-issue is one the disincentives to experimentation.
Cost is a determinant issue. Litz is expensive. A longer,
thicker ferrite rod is currently unobtainable and would in any case
be very expensive. Neither do I have the real-estate for a beverage.
I may have to settle for more modest, uncompetitive uldx compromises.
I may well have suitable Litz in my junk-box, but have no way of assessing.
The suggested UK source of ferrite rods is known; but unfortunately
availability is delayed and length and diameter do not exceed what
I have in the junk-box and no way approach those available in the US.

Maybe my predestination is for homebrew shortwave - as long as it lasts.
I could, of course, build a big loop, but that would shout at my diminutive
SRF-59, which does not know that LW exits.

Michael UK


----- Original Message -------------------------------------------------------------------
From: "ferrite61" <dxrx@>
To: <ultralightdx@yahoogroups.com>
Sent: 23 February 2011 18:48
Subject: [ultralightdx] Re: size of litz wire for MW band


I would choose some thing "X"/46 as it is the right-sized strand of Litz wire for the AM-BCB. Litz wire that is "X"/44
is better suited for the NDB's (more precisely X/43 is ideal). Affordability is the key issue for most, as the price is
high compared to mamgnet wire (solid Cu).

Paul S. in CT


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

Which size litz wire works best for winding on a ferrite rod for MW (520-1710) band, 40/44, 100/44 or 175/46? I don't
have a meter for measuring inductance. Can anyone tell me approximately how many turns are required to get optimum
performance on a 3/8" X 4" ferrite rod?
Should the coil be centred on the antenna? I'm trying to replace the internal antenna on a PL380.

Thanks
Stew


Re: size of litz wire for MW band

ferrite61 <dxrx@...>
 

OT: I actually built a simple 1 transistor radio from JB parts, just buying a 2n5089 transistor for a quarter. Cake-Frosting cans for the coil-form and a wire to the telephone ground, et voila AM-BCB radio using Xtal earphones. Mighty fine little RX on a solderless breadboard using no solder whatsoever. Takes 2 AA cells that last YEARS! I even entered it into a few contests and made average score. No litz or special antennas just the grounded RX. Since building it 10/1/2004 it has 312 stations in the log. :) /OT

Motivated by the 50th anniversary of the 1st commercial pocket transistor to get'er dun nudge, nudge.

Paul S. in CT

--- In ultralightdx@yahoogroups.com, "Michael" <michael.setaazul@...> wrote:

Thanks for the lifeboat, Paul. The thought assailed me
that I could use a TP cheapo-less-than-uldx receiver,
ferret in the junkbox for ferrite and Litz that the mice
have recoiled from, and suck-it-and-see if I can restore
hope. Fascinating, how a positive nudge can
instigate renewed positive thinking! Thanks again, Paul.

Michael UK



----- Original Message -----
From: "ferrite61" <dxrx@...>
To: <ultralightdx@yahoogroups.com>
Sent: 23 February 2011 20:06
Subject: [ultralightdx] Re: size of litz wire for MW band


In your case, take the fattest Litz wire on-hand and wrap 60 turns around your 3/8" diameter by 4" long stick. Center
the wire on the stick, and presume a winding length of 1.5". This yields about 225 uH, just a little low for the am-bcb.
It will take 7 feet of wire including the connection. If your piece of litz is longer, add 6-8 more turns figuring 1.75"
for the coil length. For 68 turns at 1.75" of winding length the inductance increases to about 270 uH. Having some litz,
any litz in the junque-box, with a stick is preferable to buying such. ;)

Paul S. in CT


--- In ultralightdx@yahoogroups.com, "Michael" <michael.setaazul@> wrote:

For me, the Litz-issue is one the disincentives to experimentation.
Cost is a determinant issue. Litz is expensive. A longer,
thicker ferrite rod is currently unobtainable and would in any case
be very expensive. Neither do I have the real-estate for a beverage.
I may have to settle for more modest, uncompetitive uldx compromises.
I may well have suitable Litz in my junk-box, but have no way of assessing.
The suggested UK source of ferrite rods is known; but unfortunately
availability is delayed and length and diameter do not exceed what
I have in the junk-box and no way approach those available in the US.

Maybe my predestination is for homebrew shortwave - as long as it lasts.
I could, of course, build a big loop, but that would shout at my diminutive
SRF-59, which does not know that LW exits.

Michael UK


----- Original Message -------------------------------------------------------------------
From: "ferrite61" <dxrx@>
To: <ultralightdx@yahoogroups.com>
Sent: 23 February 2011 18:48
Subject: [ultralightdx] Re: size of litz wire for MW band


I would choose some thing "X"/46 as it is the right-sized strand of Litz wire for the AM-BCB. Litz wire that is "X"/44
is better suited for the NDB's (more precisely X/43 is ideal). Affordability is the key issue for most, as the price
is
high compared to mamgnet wire (solid Cu).

Paul S. in CT


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

Which size litz wire works best for winding on a ferrite rod for MW (520-1710) band, 40/44, 100/44 or 175/46? I
don't
have a meter for measuring inductance. Can anyone tell me approximately how many turns are required to get optimum
performance on a 3/8" X 4" ferrite rod?
Should the coil be centred on the antenna? I'm trying to replace the internal antenna on a PL380.

Thanks
Stew



------------------------------------

Yahoo! Groups Links


Re: size of litz wire for MW band

Michael <michael.setaazul@...>
 

Thanks for the lifeboat, Paul. The thought assailed me
that I could use a TP cheapo-less-than-uldx receiver,
ferret in the junkbox for ferrite and Litz that the mice
have recoiled from, and suck-it-and-see if I can restore
hope. Fascinating, how a positive nudge can
instigate renewed positive thinking! Thanks again, Paul.

Michael UK

----- Original Message -----
From: "ferrite61" <dxrx@am3-radio.us>
To: <ultralightdx@yahoogroups.com>
Sent: 23 February 2011 20:06
Subject: [ultralightdx] Re: size of litz wire for MW band


In your case, take the fattest Litz wire on-hand and wrap 60 turns around your 3/8" diameter by 4" long stick. Center
the wire on the stick, and presume a winding length of 1.5". This yields about 225 uH, just a little low for the am-bcb.
It will take 7 feet of wire including the connection. If your piece of litz is longer, add 6-8 more turns figuring 1.75"
for the coil length. For 68 turns at 1.75" of winding length the inductance increases to about 270 uH. Having some litz,
any litz in the junque-box, with a stick is preferable to buying such. ;)

Paul S. in CT


--- In ultralightdx@yahoogroups.com, "Michael" <michael.setaazul@...> wrote:

For me, the Litz-issue is one the disincentives to experimentation.
Cost is a determinant issue. Litz is expensive. A longer,
thicker ferrite rod is currently unobtainable and would in any case
be very expensive. Neither do I have the real-estate for a beverage.
I may have to settle for more modest, uncompetitive uldx compromises.
I may well have suitable Litz in my junk-box, but have no way of assessing.
The suggested UK source of ferrite rods is known; but unfortunately
availability is delayed and length and diameter do not exceed what
I have in the junk-box and no way approach those available in the US.

Maybe my predestination is for homebrew shortwave - as long as it lasts.
I could, of course, build a big loop, but that would shout at my diminutive
SRF-59, which does not know that LW exits.

Michael UK


----- Original Message -------------------------------------------------------------------
From: "ferrite61" <dxrx@...>
To: <ultralightdx@yahoogroups.com>
Sent: 23 February 2011 18:48
Subject: [ultralightdx] Re: size of litz wire for MW band


I would choose some thing "X"/46 as it is the right-sized strand of Litz wire for the AM-BCB. Litz wire that is "X"/44
is better suited for the NDB's (more precisely X/43 is ideal). Affordability is the key issue for most, as the price
is
high compared to mamgnet wire (solid Cu).

Paul S. in CT


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

Which size litz wire works best for winding on a ferrite rod for MW (520-1710) band, 40/44, 100/44 or 175/46? I
don't
have a meter for measuring inductance. Can anyone tell me approximately how many turns are required to get optimum
performance on a 3/8" X 4" ferrite rod?
Should the coil be centred on the antenna? I'm trying to replace the internal antenna on a PL380.

Thanks
Stew



------------------------------------

Yahoo! Groups Links


Re: size of litz wire for MW band

ferrite61 <dxrx@...>
 

In your case, take the fattest Litz wire on-hand and wrap 60 turns around your 3/8" diameter by 4" long stick. Center the wire on the stick, and presume a winding length of 1.5". This yields about 225 uH, just a little low for the am-bcb. It will take 7 feet of wire including the connection. If your piece of litz is longer, add 6-8 more turns figuring 1.75" for the coil length. For 68 turns at 1.75" of winding length the inductance increases to about 270 uH. Having some litz, any litz in the junque-box, with a stick is preferable to buying such. ;)

Paul S. in CT

--- In ultralightdx@yahoogroups.com, "Michael" <michael.setaazul@...> wrote:

For me, the Litz-issue is one the disincentives to experimentation.
Cost is a determinant issue. Litz is expensive. A longer,
thicker ferrite rod is currently unobtainable and would in any case
be very expensive. Neither do I have the real-estate for a beverage.
I may have to settle for more modest, uncompetitive uldx compromises.
I may well have suitable Litz in my junk-box, but have no way of assessing.
The suggested UK source of ferrite rods is known; but unfortunately
availability is delayed and length and diameter do not exceed what
I have in the junk-box and no way approach those available in the US.

Maybe my predestination is for homebrew shortwave - as long as it lasts.
I could, of course, build a big loop, but that would shout at my diminutive
SRF-59, which does not know that LW exits.

Michael UK


----- Original Message -------------------------------------------------------------------
From: "ferrite61" <dxrx@...>
To: <ultralightdx@yahoogroups.com>
Sent: 23 February 2011 18:48
Subject: [ultralightdx] Re: size of litz wire for MW band


I would choose some thing "X"/46 as it is the right-sized strand of Litz wire for the AM-BCB. Litz wire that is "X"/44
is better suited for the NDB's (more precisely X/43 is ideal). Affordability is the key issue for most, as the price is
high compared to mamgnet wire (solid Cu).

Paul S. in CT


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

Which size litz wire works best for winding on a ferrite rod for MW (520-1710) band, 40/44, 100/44 or 175/46? I don't
have a meter for measuring inductance. Can anyone tell me approximately how many turns are required to get optimum
performance on a 3/8" X 4" ferrite rod?
Should the coil be centred on the antenna? I'm trying to replace the internal antenna on a PL380.

Thanks
Stew


Re: NZ Earthquake

ferrite61 <dxrx@...>
 

OOPS make that 10,375 MILES. (16,700 km) roughly.

Paul S. in CT

--- In ultralightdx@yahoogroups.com, "ferrite61" <dxrx@...> wrote:


Quite a RX surprize especically for the R-911 doing 11,000 km from CT.

Paul S. in CT


New station this morning (2/23/11)

bbwrwy
 

I heard another new station this morning with a barefoot SRF-T615.

2/23/11
1344-1412 1590 KMOZ, Rolla MO (1kW @ 538km), religious talk from Bott Radio Network, Bott promos 1400-1401, mid-Missouri WX 1402, program on personal finances. Station #811, barefoot #797.

Propagation after sunrise was better than usual. 1590 WAIK, Galesburg IL (5kW @ 801km) was audible to tune-out at 1412. Then I heard 1600 KGYM, Cedar Rapids IA (5kW @ 803km), with eastern Iowa WX at 1414. At 1419, I heard 1560 KKAA, Aberdeen SD (10kW @ 1008km), with Family Radio programming, good signal over near-by KEBC, Del City OK (1kW @ 105km), and KGOW, Bellaire TX (50kW @ 804km).

Last evening I observed 1590 WZRX, Jackson MS (1kW @ 798km), broadcasting a test tone to 0500 UTC, then ABC News followed by PSA's & ID, returning to the test tone at 0506. I've concluded WZRX doesn't have programming to fill time between newscasts.

At 0508, I heard 1590 WCGO, Evanston IL (2.5kW @ 1046km), in Assyrian language. Some ads were in Assyrian and English. Near Eastern music from 0530.

Wishing everyone good DX.

Richard.

Richard Allen
36°22'51"N / 97°26'35"W
(near Perry OK USA)

18641 - 18660 of 32514