Date   

Gonna Publish the Monthly Firsts and Records List on Thursday

John H. Bryant <bjohnorcas@...>
 

I'm going to do the monthly update of Ultralight Firsts and Records about mid-week. I've already got some real eye-openers from Paul Logan and Allen Willie, but would like to have more before Wednesday evening. If you have been Ultralighting and have set a new record, even by a mile or two, let me know!


Thanks!


John B.
Stillwater, Oklahoma, USA + Flocka Ultralights
Rcvrs: WiNRADiO 313e, Eton e1, NRD-535(kiwa-mods)
Antennas: 700' NE/SW mini-Bev, Wellbrook Phased Array (pre-production version)
















John B.
Stillwater, Oklahoma, USA
Rcvrs: WiNRADiO 313e, Eton e1, NRD-535(kiwa-mods)
Antennas: 700' NE/SW mini-Bev, Wellbrook Phased Array (pre-production version)


Saturday night / Sunday morning Ultralight logs

MarkWA1ION
 

Noted around local midnight (EDT) / 0400 UTC on SRF-39FP:

1359 Spain - fairly loud, about equal to 1360 WDRC/WNJC.

1584 Ceuta - audio popping up once in a while if I nulled 1580 CKDO.

Unfortunately on 1530 it was all WCKY on the Sony even though at 0419
UTC on my Drake R8A / northeast SuperLoop combo, the Vatican's chime
interval signal was clearly dominating 1530. This points out one of
the great failings of ferrite rod antennas here in the northeastern
US: a bidirectional pick-up pattern when clearly a cardioid (nulling
west or southwest) is to be preferred.

Mark Connelly, WA1ION - Billerica, MA, USA


Re: Saturday night / Sunday morning Ultralight logs

Gary DeBock
 

Hi Mark,
 
     Congratulations on your loggings of Spain-1359 and Ceuta-1584 on your stock SRF-39FP ultralight.  I'm sure that it was challenging, trying to dodge the domestic QRM.  That's probably why stock ultralight TA and TP loggings are pretty rare (unless you live in Newfoundland)...the ferrite bar cardoid pattern is part of the big challenge.
 
     For a new experience, you might wish to try inductive coupling of your SRF-39FP to the northeast SuperLoop.  While not as challenging as trying for TA's with a stock unit, it still would prove challenging to log multiple TA's with only the AM mode and no narrow filters.  Here on the west coast, Dennis Vroom set the current Ultralight distance record by inductively coupling his SRF-39FP to his NW EWE antenna, and logging VOA-Thailand on 1575.  John Bryant also plans to connect his "Nationel SRF-39FP" to his effective external antennas, when he returns to the west coast next month.  Stock TP and TA reception is certainly thrilling, but there are many other ways to chase DX (and have lots of fun) with these radios.
 
                                                                         73,  Gary
 
                                                                                      . 
 
    




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Ultralight DX Loggings from ODXA DX Camp......................

robert ross
 

Howdy Guys:

Well....I returned from the ODXA Radio Camp early this morning. Wish I
could say that conditions were GREAT...and I logged a Pile of Good
ones....but I can't!! The Food was Great.....the Weather was Great.....and
Comraderie was Great.....but the conditions STUNK!! HAHHAHA....

I have found up here in my neck of the woods that the conditions took a
real turn for the worse.......the day we turned the clocks ahead for
DST...and they have not recovered.

Although I had a full arsenal of ULR's at the ready...things just never got
going.....even on the Drake R8B and 200 Foot Long Wire.

However, we had fun, and I got to see 2 of my Old DX Buddies that I hadn't
seen in YEARS.......Niel Wolfish and Saul Chernos from Toronto. Both of
them are also ULR DX'ers as well....and had their ULR's there too.....

Nothing Exotic heard....not even a Cuban!!!

Here's the small list of stations worthy of being reported!!

Radio Used was......SONY SRF-T615 Barefoot, and ETON E-100 Barefoot.

Location was Shadow Lake ODXA DX Camp...located on Musselman Lake, near
Stouffville Ontario...(North Of Toronto).

73........ROB.

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
1110 WUPE Pittsfield, MASS. April/04/08 1938 EDT EE GOOD
Ad for "Ronny's Harley Davidson" in Pittsfield. Female DJ with ID as WUPE.
Into Ads.

RELOG...Heard here in London previously 5 KW
ROSS, ONT.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
780 CFDR Halifax, NOVA SCOTIA April/04/08 2157 EDT EE FR-GD
Under WBBM. Classic Country Music. Local Weather . Gave a URL as
"???halifax .com".Into more CW Music.

NEW....but not counted in LOG as heard while too far from
home!!!!! 50/15 KW
ROSS, ONT.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
1710 PIRATE Radio Top Inter??? Boston MASS area Apr/04/08 2240
EDT FRENCH FR
Local Boston Haitian Pirate presumed. Male DJ spoke French 2240-45 EDT.
Still in at 2252 with male and Female speaking French. NO ID heard...so
just presumed
this is them????

RELOG...Previously heard here in London.
ROSS, ONT.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

73.........ROB.

Robert S. Ross VA3SW
Box 1003, Stn. B.
London, Ontario
CANADA N6A5K1

Antique/Vintage Radio Enthusiast
Amateur Radio Stations VA3SW/VE3JFC

Defy Physics.....Play Table Tennis!! (Ping Pong with an Attitude)
«¤»¥«¤»§«¤»¥«¤»§«¤»¥«¤»§«¤»¥«¤»§«¤»¥«¤»§«¤»¥«¤»¥«¤»§«¤»¥«


Re: a P.S. on my previous post and a reply to Kevin

dhsatyadhana <satya@...>
 

Hey Garry:

Interesting! I don't know enough ferrite-core antennae, although in
a way the idea of less turns the better makes sense, in that large
ferrite rods with smaller lengths of wire have more gain than the
tiny ferrites, which must put on more turns to get enough
inductance. In your scenario, might there there still be more gain
by laying on a few more turns of wire, in that the additional turns
would more than make up for their copper losses?

I have a 28" x 42" box loop (essentially a slightly-squashed three
footer), with 10 turns of 16 gauge for 540-1700+ khz and an
additional 17 turns for 150-700 khz. I use two DPDT switches to make
it work, along with a 3-gang (15-450 pf per section w/ceramic posts)
cap. Putting my Quantum Loop in the middle of it makes for some
incredible gain or passive phasing, depending on the circumstances.
I have noticed that, on MW, I have to short out the LW coil in order
to prevent it from de-Qing the MW coil and adding unwanted
inductance.



Kevin


--- In ultralightdx@yahoogroups.com, "sloshatron" <wa1gwh@...> wrote:
Kevin;

Interesting situation on the MW vs LW windings used with the same
variable. I know that more turns and less C create a higher
voltage
at the loop terminals. This is handy with crystal set loops
because
the higher performance diodes will work more efficiently with
higher
voltage. But I think this should not make any difference with a
magnetically coupled arrangement like you describe. In fact, if
the
wire sizes for both windings are the same and the windings are the
same size I would think that the shorter winding would be superior
because the total copper losses would be lower in the shorter
length
of wire. And, the capacitor would be used at a higher value to
resonate the pair at the same frequency. Unless the capacitor is a
high quality one (ceramic insulators, no corrosion at joints) it
will
have a higher Q at higher capacity settings. This idea is (once
again!) from a Ben Tongue paper where he documented that a small
receiver type phenolic insulated variable had lower losses at
higher
settings of C.

I suspect that having two loops on one frame might be the answer to
this situation. I believe that unused windings and tapped windings
are usually avoided in constructing high performance loops. Guess
it
depends on convenience and what is desired for efficiency.

How big is your box loop? My current crystal set is a 3' x 3' box
loop of #14 bare solid wire. In the last listening contest in
January I logged about 90 stations with it in a week or so. I
don't
use a spotter radio -- I like to do it all with the crystal set.
Just nuts I guess. Ought to fit in well here!

Garry
near Syracuse, NY


a P.S. on my previous post and a reply to Kevin

sloshatron <wa1gwh@...>
 

I forgot to mention a few things on my previous post. They bubbled
up later as I was doing yard work!

My basket weave coil is about 4.1" diameter and 1.2" in length. So
it is "loop-like". I think that a longer and narrower solenoidal
coil will work more poorly as an antenna. Thought I should mention
this in case anyone throws something together to fool around with.

I was thinking of the spider web type coil because the turns count
could be easily manipulated for alignment purposes. I think it would
be easier to unwind a portion of a turn off the broad flat spokes of
a plastic form than from a solenoidal type loop. I wonder if the
wire unwound could be left intact (if short) for an iteration or two
until the "ballpark" is found. Then wire cutting could happen. Off
the coil its inductance would be fairly low at 600 kHz.

I think it was John who furnished the nice one-pager on the SRF stock
ferrite bar coil complete with measurements of inductance (+/- 580
uH). Does anyone know how much it is possible to vary the inductance
by sliding the smaller winding across the customary range that is
used in alignment? That would give an indication of how much an air
core loop would have to be varied during alignment.

Kevin;

Interesting situation on the MW vs LW windings used with the same
variable. I know that more turns and less C create a higher voltage
at the loop terminals. This is handy with crystal set loops because
the higher performance diodes will work more efficiently with higher
voltage. But I think this should not make any difference with a
magnetically coupled arrangement like you describe. In fact, if the
wire sizes for both windings are the same and the windings are the
same size I would think that the shorter winding would be superior
because the total copper losses would be lower in the shorter length
of wire. And, the capacitor would be used at a higher value to
resonate the pair at the same frequency. Unless the capacitor is a
high quality one (ceramic insulators, no corrosion at joints) it will
have a higher Q at higher capacity settings. This idea is (once
again!) from a Ben Tongue paper where he documented that a small
receiver type phenolic insulated variable had lower losses at higher
settings of C.

I suspect that having two loops on one frame might be the answer to
this situation. I believe that unused windings and tapped windings
are usually avoided in constructing high performance loops. Guess it
depends on convenience and what is desired for efficiency.

How big is your box loop? My current crystal set is a 3' x 3' box
loop of #14 bare solid wire. In the last listening contest in
January I logged about 90 stations with it in a week or so. I don't
use a spotter radio -- I like to do it all with the crystal set.
Just nuts I guess. Ought to fit in well here!

Garry
near Syracuse, NY


Re: SRF antenna transplant comments

dhsatyadhana <satya@...>
 

Hi Garry:

Neat experiment! A thought on the gain difference between the two - I
have been struck by the gain increase when I put as many turns as
possible on loops. I have a large solenoid-wound PVC box loop with a
LW coil and a MW coil, both of which can tune 540 khz with the same
variable cap. On 540 khz, the gain on the upper end of the LW coil is
dramatically larger than the lower end of the MW coil. So, perhaps if
you only had enough turns on your ferrite to get to the upper end of
the MW band, putting the "normal" amount on the ferrite will make it
more competitive with the air-core spider loop?

Kevin S
Bianbridge Island, WA

--- In ultralightdx@yahoogroups.com, "sloshatron" <wa1gwh@...> wrote:
I only have a big
old ferrite bar of unknown material and quality on hand. I wound on
enough #20 PVC coated hookup wire to get me into the top half of the
MW band and compared it to a 4 1/2 inch air core basket weave
solenoid coil of #21 solid using the same variable capacitor for both
tests.


New file uploaded to ultralightdx

ultralightdx@...
 

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the ultralightdx
group.

File : /wjcc_06-04-2008_06-24-39.mp3
Uploaded by : paulloganradio <paulloganradio@yahoo.ie>
Description : WJCC 1700 - Sony SRF59 - 4 foot loop, 4-6-08, 4111 miles

You can access this file at the URL:
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Regards,

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Re: My first image on the SRF-59

Joseph Miller <radiodxer2000@...>
 

My recollection is either 3210 or 3215 kHz.


--- John Cereghin <jcereghin@gmail.com> wrote:

I got my first image on my SRF-59. I was hearing
WWRB, a shortwave station
down on the lower end of the dial, around 530-540
khz, with preaching and
then an ID. I'm not sure which shortwave frequency
I was hearing at the
time.

Oh well...no radio is perfect!

John Cereghin WDX3IAO
Smyrna DE

--
http://www.pilgrimway.org/dx.html


____________________________________________________________________________________
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SRF antenna transplant comments

sloshatron <wa1gwh@...>
 

Thank you for the reply, Gary. It's nice to know that only matching
up the inductance is close enough!

Thank you for the comment and question, Guy. My understanding is
that despite their being two separate coils on the stock SRF
loopstick and despite the bigger coil being tapped the entire unit
works as a single untapped inductor in the circuit. The tap does not
seem important (it may have been used in some other model?) and the
second smaller coil is slid along the bar to vary the inductance of
the whole loopstick unit for alignment purposes.

So with regard to a possible spider web transplant, I was thinking of
a single continuous wind with just a touch more total inductance.
Alignment would be accomplished by removing/adding turns or partial
turns. Since this could not be done with the radio running and while
listening to a test signal, I'm wondering if measuring the audio
output with a meter (as shown in the service manual) each trial as
turns are removed/added and the radio repeatedly turned on and off
for the procedure might work.

I'm just kind of dreaming about this. The Rap N Tap discussion group
of the Xtal Set Society has kicked around the idea that ferrite can
vary in its quality, even from the same supplier. It is indeed
easier to use, especially for this application, but I only have a big
old ferrite bar of unknown material and quality on hand. I wound on
enough #20 PVC coated hookup wire to get me into the top half of the
MW band and compared it to a 4 1/2 inch air core basket weave
solenoid coil of #21 solid using the same variable capacitor for both
tests. This was a booster bar antenna setup like Gil Stacy's idea,
my SRF was operated stock. The result was that the air core solenoid
was way better than the ferrite bar. Use of the air core coil gave
substantial signal level increase.

This was not a fair test, however, because the winding on the ferrite
bar is substantially non-optimum. I covers too much of the bar and
was not separated an eighth inch or so from the bar (based on info
from our guru, Ben Tongue).

I am planning to do a better winding on the ferrite bar when I figure
out how and get around to it. Based on my scan of Ben's article, #30
wire centered with turns spaced at least one wire diameter and about
an eighth inch off the bar should be a better configuration for this
type of inductor.

Ben's article can be found at:

http://www.bentongue.com/xtalset/29MxQFL/29MxQFL.html

Whether the performance differences he indicates are observable with
amplified radios like the SRFs remains to be seen.

Garry
near Syracuse, NY


20 Inch Loopstick Overloads SRF-39FP

Gary DeBock
 

Hello Guys,
 
     Apparently not even the crunch-resistant CXA1129 chip can handle the mega-RF from a 20 inch loopstick.
 
     Working OK until the 1400 kHz trimmer was peaked, the huge RF onslaught finally did in the CXA1129 "radio on a chip," and the "birdies" started to fly.  This is not the first time that the mega-loopsticks have overloaded the CXA1129;  but some of the IC chips are apparently more crunch-proof than others, and the 14-inch loopstick model has never had any problems.  Two of the four 7-inch models had minor birdies, but the other two were essentially free of spurs.  If you are considering a loopstick transplant, it's kind of an uncertainty as to whether your CXA1129 can handle the extreme RF levels.  If not, you can always reconnect it in stock form.
 
     The 20-inch loopstick may need to give its mega-RF to a different SRF-39FP, or if not possible, maybe a DT-200VX or E100.  Sooner or later, it should find a nice home.
 
                                                                                                        73,  Gary    




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Re: Calling John Bryant / Firsts and distance records

Dennis Gibson <wb6tnb@...>
 

How much difference did the tweak make? I have a number of headphones;
the Sennheiser HD 420 sounds the best.

My SRF-59 and 39FP are stock; at some point I'll have Gary work his
magic on them. I do not disassemble electronic equipment. Disaster is
sure to follow.

--- In ultralightdx@yahoogroups.com, Paul Logan <paulloganradio@...>
wrote:

Hi Dennis,

I have two SRF59's one was tweaked by me - as it turns out the tweak
brought radio # 2 up to the level of the other stock one in terms of
sensitivity so I may have got a "dud".

However I did get the 2nd radio to tune the x- band which the stock
Euro versions don't cover.

All of the TA signals outside the x band were heard completely
barefoot - x band catches were made by placing the radio inside a 4
foot loop.

Great little radio - I'm also very taken with its audio - I often
hear WLAA 1680 and the Mexican music sounds superb.


Re: Argentina on 1620

Dennis Gibson <wb6tnb@...>
 

You know what they say; two people divided by a common language.

--- In ultralightdx@yahoogroups.com, Paul Logan <paulloganradio@...>
wrote:

One of these days I will manage English! that was supposed to read "
with a two foot loop"


Re: Argentina on 1620

Paul Logan
 

Hi Huelbe,

at 0233 UTC it is playing the Beatles "Please Please Me" OM dj, weak.

huelbe_garcia@... wrote:
Hi Paul,
 
can you describe what kind of programming you heard? If we can confirm that, it's a nice DX!
 
I live next to Argetina (south Brazil) and there is an station on 1620 really strong. I learnt it relays an FM and programming and is basically popular rock music from 70s to 90s. It is called "Universo".
 
This station is located in Mar Del Plata, Argentina.
 
Huelbe
Porto Alegre, Brazil
 
 
----- Original Message -----
From: Paul Logan
Sent: Saturday, April 05, 2008 11:00 PM
Subject: [ultralightdx] Argentina on 1620

Hey All,

which Argentine station on 1620 really "gets out" weak on the srf59 with a one two foot loop.


Paul Logan,
Lisnaskea, N. Ireland

Listening Homepage: http://geocities.com/yogi540/
Photos: http://www.flickr.com/photos/radiofotos/
Video: http://www.youtube.com/user/yogi540
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Re: fanatical mega-loopstick question

Guy Atkins
 

Hi Garry,

I had been thinking about spider coils also for an ultralight. How large of a coil form do you think would be needed to compete with a hot rodded ferrite loop? Also, do you envision concentric coils on the form separated by a distance or one continuous coil with tap points as needed?

Guy Atkins
Puyallup, WA USA
www.perseus-sdr.blogspot.com

Sent via BlackBerry from T-Mobile

-----Original Message-----
From: "sloshatron" <wa1gwh@twcny.rr.com>

Date: Sat, 05 Apr 2008 22:58:16
To:ultralightdx@yahoogroups.com
Subject: [ultralightdx] fanatical mega-loopstick question


Hi Gary;

When you measure the recycled coils on the LCR meter, are you
checking only the L or are you somehow taking into account any C
differences between the original and tranplant coils (either on or
off the ferrite bars)? This would be the distributed capacity of the
coils.

If this is working with just L measurements that would be great and
much easier for folks to duplicate.

Also, I'm still thinking about air core coils (small loop antenna
style) to replace the original ferrite loopstick. I realized that if
spider web construction was used it would be much easier to take off
turns and portions of turns and if necessary to add them back on if
the best spot was missed in the iterative alignment process. A
spider web coil form could be cut out of plastic with one spoke
extending way out to mount the form to the radio in the same way as
your ruler idea.

TNX,

Garry Nichols
near Syracuse, NY


Re: Argentina on 1620

huelbe_garcia@...
 

Hi Paul,
 
can you describe what kind of programming you heard? If we can confirm that, it's a nice DX!
 
I live next to Argetina (south Brazil) and there is an station on 1620 really strong. I learnt it relays an FM and programming and is basically popular rock music from 70s to 90s. It is called "Universo".
 
This station is located in Mar Del Plata, Argentina.
 
Huelbe
Porto Alegre, Brazil
 
 

----- Original Message -----
From: Paul Logan
Sent: Saturday, April 05, 2008 11:00 PM
Subject: [ultralightdx] Argentina on 1620

Hey All,

which Argentine station on 1620 really "gets out" weak on the srf59 with a one two foot loop.


Paul Logan,
Lisnaskea, N. Ireland

Listening Homepage: http://geocities.com/yogi540/
Photos: http://www.flickr.com/photos/radiofotos/
Video: http://www.youtube.com/user/yogi540

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Re: Argentina on 1620

Paul Logan
 

One of these days I will manage English! that was supposed to read " with a two foot loop"

Paul Logan wrote:
Hey All,

which Argentine station on 1620 really "gets out" weak on the srf59 with a one two foot loop.


Paul Logan,
Lisnaskea, N. Ireland



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Argentina on 1620

Paul Logan
 

Hey All,

which Argentine station on 1620 really "gets out" weak on the srf59 with a one two foot loop.


Paul Logan,
Lisnaskea, N. Ireland

Listening Homepage: http://geocities.com/yogi540/
Photos: http://www.flickr.com/photos/radiofotos/
Video: http://www.youtube.com/user/yogi540

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Re: fanatical mega-loopstick question

Gary DeBock
 

Garry and Guy,
 
     All of the mega-loopsticks (7", 14" and 21") have been constructed using an LCR meter to measure inductance only, to ensure that the recycled coils (mostly salvaged from the vintage long ferrite bars) match the  SRF-39 stock coils in inductance.  The alignment procedure, in which the small coil is slid along the ferrite bar to peak a low-band (usually 600 kHz) signal,  optimizes the match between the recycled coils and the SRF-39 circuitry, making it unnecessary to measure capacitance and resistance during the construction process.  As long as the inductances match, and the 600 kHz peak is sharp, the newly recylced coils are perfect for DX reception in the SRF-59.
     As for comparison of the ferrite mega-loopsticks and  spider coils, I'm sorry that I have never experimented with spider coils, or air-core loops.  The ferrite mega-loopsticks seem to be great for DX, relatively cheap, and still quite portable.  The only drawback is that you inevitably make longer and longer ones, as you fanatically strive for the highest sensitivity level.  Eventually you need to face the reality that doorways are only 30" wide.
     Guy, if you wish to make some spider coils and compare them to the mega-loopsticks, you can borrow them at any time (Guy and I live in the same city).  As of today, all of them will still fit through a doorway  :>)
 
                                                                                           73,  Gary
    
   




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Re: Calling John Bryant / Firsts and distance records

Paul Logan
 

Hi Dennis,

I have two SRF59's one was tweaked by me - as it turns out the tweak brought radio # 2 up to the level of the other stock one in terms of sensitivity so I may have got a "dud".

However I did get the 2nd radio to tune the x- band which the stock Euro versions dont cover.

All of the TA signals outside the x band were heard completely barefoot -  x band catches were made by placing the radio inside a 4 foot loop.

Great little radio - Im also very taken with its audio - I often hear WLAA 1680 and the Mexican music sounds superb.

Dennis Gibson wrote:
Paul - is your SRF-59 stock (not tweaked for best performance)? Are
your non expanded band logs barefoot or with the loop?

73



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