Date   

Re: ++++SPAM++++ Re: Longwave version of Crate Loop - fantastic!

satya@...
 

Thanks for the link - didn't know such a thing existed!

I have one decent variable capacitor with a reduction gear and linear
tuning for the top end that I am going to hijack from its current use and
put into the Crate.


Thanks - Kevin

hi kevin, take a look at the link in the links section of this group.
i haven't tried one but they use ball bearings for the reduction and
is supposed to be very smooth operation and the price is very
reasonable. below is a copy of an email received a while back re: the
costs.

"Dear sir --

The BD601 would cost $6.00 for one pc or $5.50 each for 2 pcs. BD602
would cost $8.00 for one pc or $7.00 each for 2 pcs. We could ship
them the day after you place your order; payment options include Visa
and Mastercard.

Thanks

Steven Elliott
Oren Elliott Products, Inc.
ph 419-298-2306"

Ron

Tuning is incredibly sharp, so much so that I need a varicap
with a reduction gear or a small-value fine-tuning capacitor.

73 Kevin Schanilec
Bainbridge Island, WA


Re: Longwave version of Crate Loop - fantastic!

ronshire2000
 

hi kevin, take a look at the link in the links section of this group.
i haven't tried one but they use ball bearings for the reduction and
is supposed to be very smooth operation and the price is very
reasonable. below is a copy of an email received a while back re: the
costs.

"Dear sir --

The BD601 would cost $6.00 for one pc or $5.50 each for 2 pcs. BD602
would cost $8.00 for one pc or $7.00 each for 2 pcs. We could ship
them the day after you place your order; payment options include Visa
and Mastercard.

Thanks

Steven Elliott
Oren Elliott Products, Inc.
ph 419-298-2306"

Ron

Tuning is incredibly sharp, so much so that I need a varicap
with a reduction gear or a small-value fine-tuning capacitor.

73 – Kevin Schanilec
Bainbridge Island, WA


Re: Sony SRF-T615

Brandon Jordan <bcdx.org@...>
 

Hi John--

Yeah, opening this up will not be for the faint of heart. Thanks to a nice member of this group, I now have a pdf of the repair manual and so wouldn't be trodding into the unknown without a map! I may wait until I have a second T615 in hand before even attempting to open my first one... just in case ;) I am having my doubts that there will be a spot sufficient for a 2.5mm jack. When, and if, I open one up I will definitely make pictures.

Regarding my 3-Hook Slider, I have not posted an updated picture. I still have to add the external antenna bnc jack and pick-up loop, which I am doing tomorrow. Pictures then. Did you see my previous post regarding the details on the hooks? I'd be more than happy to send a trio of em to anyone who would like to try them but can't locate them in their local hardware store.

73,
Brandon

John H. Bryant wrote:

Brandon.... You'll LOVE the T615. I'm rather sure that none of us have opened that beauty to add an external antenna tap. The set is so small and so beautiful that none of us have wanted to perform surgery.

If I might suggest an alternative: Make one of those tuned booster bars that Gil Stacy first wrote about 8 months ago or so.... use a fairly small bar.... the 1/2" by 7.5 from Amidon or even a transplanted old bar.... any way, you can put an external pick-up on that Booster Bar just like my article shows doing directly to the internal ferrite bar.... the "Swamping Effect" works on Booster Bar, too. So, then, you hook the external antenna to the booster bar and lay the pristine T615 nearby. The transfer of energy is not quite as efficient as a direct connection to the radio itself, but its close and VARIABLE.... not a bad thing.

If you open that baby up, PLEASE take us some pictures and post them (or send them to me and I will do so.)

Speaking of which, Brandon, I've been meaning to drop you a note.... Have you posted photos of your final three hook version of the Slider E100??? If so, I missed them and sure would like to see what you did.

You are gonna love the T615! This last two weeks, I've been DXing about half-time with the Slider E100 hooked to the Wellbrook Array. The other half of the time I've been hunting the upper band with a Barefoot T615. Love it!

John B.




Re: Investing in Ultralight DX's Future...............

Brandon Jordan <bcdx.org@...>
 

I bought my T615 from joynetcafe also, $155 shipped. The vendor promptly contacted me and advised that unfortunately, due to the New Years situation in Japan, that he couldn't ship until Jan 6.

I am also going to buy another one of these next month, as long as you, ahem, investors haven't depleted the market by then!! ;) This was going through my mind when I ordered mine the other day, that I really need to invest in a second unit for a backup soon. Heck, maybe even a third eventually. These are already rather hard to obtain, and if the supplies via joynetcafe or audiocubes dries up.. But then again, I have my eye on a Perseus.

73,
Brandon

D1028Gary@... wrote:


Audio Cubes 2 does have some competition now from the eBay vendor "joynetcafe," however. The eBay vendor offers the unit at $135.00 plus $20.00 express shipping, while Audio Cubes 2 demands $149.00 plus $16.00 express shipping. I've ordered from both, and the service is comparable.


Re: Longwave version of Crate Loop - fantastic!

Joseph Miller <radiodxer2000@...>
 

Kevin,

That is utterly amazing. Not so much that you came up with a practical design that works, but that you were reading my mind from 2,000 miles away, and built this antenna even before I had the chance to ask if it was possible, hi.

I will read this with great interest. Meanwhile, I'm finishing up with the NDB CLE Pyramid event and I am about 2 stations away from completing a size 10 pyramid.

Best wishes es 73 de Joe, KJ8O, Troy, MI

--- On Sat, 1/3/09, satya@... <satya@...> wrote:

From: satya@... <satya@...>
Subject: [ultralightdx] Longwave version of Crate Loop - fantastic!
To: irca@..., ultralightdx@...
Date: Saturday, January 3, 2009, 6:00 PM
Hi all:

I took another storage crate and wrapped a whole bunch of
wire around it
today to see how it might fare on the LW band. The results
were downright
amazing!

Passively coupled to a Sony 7600GR, the Crate Loop
absolutely blows the
doors off of my trusty Quantum Stick, and is noticeably
better than a
28x42 inch air-core loop with 350 feet of wire on it.
Pre-sunset beacons
up in Canada were used for the testing. It works great
with the receiver
either inside the crate or butted up against the windings
on the outside.

I also have a Quantum Loop with the LW head, and when
mating it passively
to the Crate Loop, the signal level is head and shoulders
above my
roof-mounted H-900 whip: a faint signal on the whip is loud
and clear with
the Quantum/Crate Loop combo. Again, it works great with
the Quantum Loop
sitting inside the crate.

Here’s the specs:
61 turns of wire (about 280 feet of wire) spaced ~1/8”
apart
Winding area: 13 by 15 inches, 8-inch coil depth
14-390 pf varicap tuning range: 198 khz - 750 khz
23-870 pf varicap tuning range: 150 khz - 620 khz
With 58 turns, range was about 203 khz -770 khz with the
14-390 varicap

I actually ran out of wire, and probably could have gotten
up to 70 turns
or more on before starting to lose the upper part of the
band at 530 khz.
Therefore, I may be able to get closer to 150 khz with
just the 14-390
varicap. Tuning is incredibly sharp, so much so that I
need a varicap
with a reduction gear or a small-value fine-tuning
capacitor.

73 – Kevin Schanilec
Bainbridge Island, WA


Re: [IRCA] Investing in Ultralight DX's Future.................

robert ross
 

John H. Bryant wrote:

ROB!

You are absolutely brilliant!!!!

Like I say, Rob, your thinking is brilliant..... now, would you like to give Linda Bryant a call at my home number and explain just how reasonable an investment this actually will be???

John B.
Stillwater, OK, USA







^^^^^^^^^^^^^^^^^^^^^^^^^^^

John.......Thanks for telling the World I am Brilliant!!!!

Now I will gladly call your Wife to tell her that you are making a Good Investment....If you will call Christine Ross at my Home Number...and tell her I am Brilliant!! AHAHHAHA

John...I think we both got problems!! HHAHHAHAA....

John...I think the ONLY Good Investment they will see in this ....is that they will know where we are late at night!!!

I don't know if this is a case of Great Minds think alike....or Fools seldom differ...but one thing is for sure.....when Sony announces that this has been discontinued...we'll both be sitting Pretty!! I thought I better get this before I retire...so I can still afford it!! HAHAHA..

By the way...NOTHING NEW heard since DEC/30...so I am in a bit of a SLUMP!! Even the T615 ain't working these past 4 Days......


73...ROB

Robert S. Ross VA3SW
London, Ontario CANADA


Re: [IRCA] Investing in Ultralight DX's Future.................

John H. Bryant <bjohnorcas@...>
 

ROB!

You are absolutely brilliant!!!! I knew that you were, but you proved it today!  As you know, I've been a bit under the weather and away from the dials for the last week or so.  That gave me some time to ponder the future of my ULR efforts, too.  I'm four-square for the Slider E100 and for one with the Murata filter aboard for TP or TA work, but as with you, the SRF-T615 has been my favorite Ultralight since one dropped outta the sky near Stillwater about a year ago. In recent weeks, I have been mixing Unlimited domestic DXing with the Slider E100 with Barefoot work, especially above 1200 kHz, with my much beloved T615. I'd love that little beauty even if I wasn't a DXer... it is about the ultimate combination of engineering and product design, rendered in early 21st Century materials and technology.... a real Museum of Modern Art classic.

Like you, I've rat-holed an extra E100 or two and think that my supply will last for a good long time.... but of my real favorite, the T615.... only one copy.  Well, today, I, too, ordered a back-up T615 from Audio Cubes 2.  With the quite reasonable air shipping, the total was a rather staggering $165.... I'll not be rat-holing multiple back-ups of this baby, that is for sure. However, this real classic is NOT going to stay in the Sony line all that long.... and I don't trust even Sony to get everything right very often, so, I'm happy to fork over the money for one more of these classics while they are still available.

I did have a bit of trouble finding the proper Audio Cube website.... there are two.  If you want to join Rob and me by wearing both belt and suspenders, T615-wise, the site with the radio is http://www.audiocubes2.com

Like I say, Rob, your thinking is brilliant..... now, would you like to give Linda Bryant a call at my home number and explain just how reasonable an investment this actually will be???

 John B.
Stillwater, OK, USA
Rcvrs: Hotrodded NRD-535, Slider e100's, Sony SRF-T615
Antennas: Wellbrook Phased Array
 



At 12:22 PM 1/3/2009 -0500, you wrote:

Hi Guys:

    Saturday morning with a Bad Back....... Nowhere to go, and Nothing to do.....except cruise the net looking for something to compliment my ULR DXing Arsenal!! After some deliberation and  thought I ended up back on the Audio Cubes Website and Ordered myself ANOTHER SONY SRF-T615 Ultralight. As I'm sure everyone knows.....It is truly my Favourite ULR...and has been the WorkHorse during my Trek to 600 Stations Heard over the past year. I have been thinking for a while....."What if they Discontinue this radio eventually...and something happens to the one I have???". Look at the E-100......it is now HISTORY...and it will be most difficult to find a New One of the Proper Vintage. So....rather than take a chance, I just decided to wish myself a HAPPY NEW YEAR by ordering another T615....just in case!! Now I can keep one in the Downstairs Shack...and the other at Bedside    to listen to GRAVEYARD STATIC as I Fade off into ULR Land!!

The Price of these has gone up somewhat since I bought my last one in JAN 2008...but at least the shipping has remained the same...$16.00 from JAPAN to CANADA.

So...Now that I have bought some more Stock Options in Audio Cubes II.....I guess you're gonna have to put up with me a little while longer here on the Ultralight Reflector!! Besides...I think I pretty much have TWO of every other ULR........so I'm sure this SINGLE T615 was feeling a little LONELY!!

I sure hope SONY keeps this PRIMO ULR in their CATALOG for some time....but just in case....I will sleep a little better now knowing I am covered with a BACKUP!!

Once again.....for those who have never used a T615......and are a little GUNSHY due to the price.....but still may be thinking of purchasing one....I hope my Purchase of a 2nd Unit will re-Inforce any thoughts you have .....of just how good I feel this Radio is!!

Now I'll be sitting here on Pins and Needles til it arrives and finds a New Home here in ULR Land!!

73...ROB.


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

Antique/Vintage Radio Enthusiast
Amateur Radio Stations VA3SW/VE3JFC
Enjoy Ultralight Radio DXing......It's like being a KID again!!

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


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Longwave version of Crate Loop - fantastic!

satya@...
 

Hi all:

I took another storage crate and wrapped a whole bunch of wire around it
today to see how it might fare on the LW band. The results were downright
amazing!

Passively coupled to a Sony 7600GR, the Crate Loop absolutely blows the
doors off of my trusty Quantum Stick, and is noticeably better than a
28x42 inch air-core loop with 350 feet of wire on it. Pre-sunset beacons
up in Canada were used for the testing. It works great with the receiver
either inside the crate or butted up against the windings on the outside.

I also have a Quantum Loop with the LW head, and when mating it passively
to the Crate Loop, the signal level is head and shoulders above my
roof-mounted H-900 whip: a faint signal on the whip is loud and clear with
the Quantum/Crate Loop combo. Again, it works great with the Quantum Loop
sitting inside the crate.

Heres the specs:
61 turns of wire (about 280 feet of wire) spaced ~1/8 apart
Winding area: 13 by 15 inches, 8-inch coil depth
14-390 pf varicap tuning range: 198 khz - 750 khz
23-870 pf varicap tuning range: 150 khz - 620 khz
With 58 turns, range was about 203 khz -770 khz with the 14-390 varicap

I actually ran out of wire, and probably could have gotten up to 70 turns
or more on before starting to lose the upper part of the band at 530 khz.
Therefore, I may be able to get closer to 150 khz with just the 14-390
varicap. Tuning is incredibly sharp, so much so that I need a varicap
with a reduction gear or a small-value fine-tuning capacitor.

73 Kevin Schanilec
Bainbridge Island, WA


new logs added since last post on 12-31-08

Carl DeWhitt
 

Since my last post on 12-31-08,i have added 7 new stations to the
log.That brings my totals here in Tennessee to 270.
Best log of the new bunch:
WWCS 540 Canonsburg,Pa. Good with Radio Disney programming and i.d."540
WWCS,Canonsburg-Pittsburgh" 1849-1859 EST on 1.1.09
73 and good dx
Carl DeWhitt
Maryville,Tn.


Re: Investing in Ultralight DX's Future...............

Gary DeBock
 

Hello John and Rob,
 
     Don't feel fanatical about having two Sony SRF-T615 units-- there have been two here for quite some time :>)  Let me echo Rob and John in saying that the tiny radio is worth every dollar of the lofty price, and is a unique combination of extreme compactness and sensitivity.  Ever user has had nothing but praise for the tiny overachiever, and some (like Rob) have developed a unique attachment to Sony's ultimate Ultralight.
 
     Audio Cubes 2 does have some competition now from the eBay vendor "joynetcafe," however.  The eBay vendor offers the unit at $135.00 plus $20.00 express shipping, while Audio Cubes 2 demands $149.00 plus $16.00 express shipping.  I've ordered from both, and the service is comparable.
 
     John and I have both had the fascinating experience of standing at Grayland and receiving multiple TP's on a tiny stock SRF-T615-- in the palm of our hands.  It is an experience unlike any other in our hobby, providing one of the ultimate thrills in Ultralight DXing.
 
     73 and Best Wishes,
 
     Gary  
 
In a message dated 1/3/2009 3:07:47 P.M. Pacific Standard Time, bjohnorcas@... writes:

ROB!

You are absolutely brilliant!!!! I knew that you were, but you proved it today!  As you know, I've been a bit under the weather and away from the dials for the last week or so.  That gave me some time to ponder the future of my ULR efforts, too.  I'm four-square for the Slider E100 and for one with the Murata filter aboard for TP or TA work, but as with you, the SRF-T615 has been my favorite Ultralight since one dropped outta the sky near Stillwater about a year ago. In recent weeks, I have been mixing Unlimited domestic DXing with the Slider E100 with Barefoot work, especially above 1200 kHz, with my much beloved T615. I'd love that little beauty even if I wasn't a DXer... it is about the ultimate combination of engineering and product design, rendered in early 21st Century materials and technology.... a real Museum of Modern Art classic.

Like you, I've rat-holed an extra E100 or two and think that my supply will last for a good long time.... but of my real favorite, the T615.... only one copy.  Well, today, I, too, ordered a back-up T615 from Audio Cubes 2.  With the quite reasonable air shipping, the total was a rather staggering $165.... I'll not be rat-holing multiple back-ups of this baby, that is for sure. However, this real classic is NOT going to stay in the Sony line all that long.... and I don't trust even Sony to get everything right very often, so, I'm happy to fork over the money for one more of these classics while they are still available.

I did have a bit of trouble finding the proper Audio Cube website.... there are two.  If you want to join Rob and me by wearing both belt and suspenders, T615-wise, the site with the radio is http://www.audiocubes2.com.

Like I say, Rob, your thinking is brilliant..... now, would you like to give Linda Bryant a call at my home number and explain just how reasonable an investment this actually will be???

 John B.
Stillwater, OK, USA
Rcvrs: Hotrodded NRD-535, Slider e100's, Sony SRF-T615
Antennas: Wellbrook Phased Array
 



At 12:22 PM 1/3/2009 -0500, you wrote:

Hi Guys:

    Saturday morning with a Bad Back....... Nowhere to go, and Nothing to do.....except cruise the net looking for something to compliment my ULR DXing Arsenal!! After some deliberation and  thought I ended up back on the Audio Cubes Website and Ordered myself ANOTHER SONY SRF-T615 Ultralight. As I'm sure everyone knows.....It is truly my Favourite ULR...and has been the WorkHorse during my Trek to 600 Stations Heard over the past year. I have been thinking for a while....."What if they Discontinue this radio eventually...and something happens to the one I have???". Look at the E-100......it is now HISTORY...and it will be most difficult to find a New One of the Proper Vintage. So....rather than take a chance, I just decided to wish myself a HAPPY NEW YEAR by ordering another T615....just in case!! Now I can keep one in the Downstairs Shack...and the other at Bedside    to listen to GRAVEYARD STATIC as I Fade off into ULR Land!!

The Price of these has gone up somewhat since I bought my last one in JAN 2008...but at least the shipping has remained the same...$16.00 from JAPAN to CANADA.

So...Now that I have bought some more Stock Options in Audio Cubes II.....I guess you're gonna have to put up with me a little while longer here on the Ultralight Reflector!! Besides...I think I pretty much have TWO of every other ULR........so I'm sure this SINGLE T615 was feeling a little LONELY!!

I sure hope SONY keeps this PRIMO ULR in their CATALOG for some time....but just in case....I will sleep a little better now knowing I am covered with a BACKUP!!

Once again.....for those who have never used a T615......and are a little GUNSHY due to the price.....but still may be thinking of purchasing one....I hope my Purchase of a 2nd Unit will re-Inforce any thoughts you have .....of just how good I feel this Radio is!!

Now I'll be sitting here on Pins and Needles til it arrives and finds a New Home here in ULR Land!!

73...ROB.


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

Antique/Vintage Radio Enthusiast
Amateur Radio Stations VA3SW/VE3JFC
Enjoy Ultralight Radio DXing......It's like being a KID again!!

Defy Physics.....Play Table Tennis!! (Ping Pong with an Attitude)
.





Re: Investing in Ultralight DX's Future.................

robert ross
 

Hi Guys:

Saturday morning with a Bad Back....... Nowhere to go, and Nothing to
do.....except cruise the net looking for something to compliment my ULR
DXing Arsenal!! After some deliberation and thought I ended up back on the
Audio Cubes Website and Ordered myself ANOTHER SONY SRF-T615 Ultralight. As
I'm sure everyone knows.....It is truly my Favourite ULR...and has been the
WorkHorse during my Trek to 600 Stations Heard over the past year. I have
been thinking for a while....."What if they Discontinue this radio
eventually...and something happens to the one I have???". Look at the
E-100......it is now HISTORY...and it will be most difficult to find a New
One of the Proper Vintage. So....rather than take a chance, I just decided
to wish myself a HAPPY NEW YEAR by ordering another T615....just in case!!
Now I can keep one in the Downstairs Shack...and the other at Bedside to
listen to GRAVEYARD STATIC as I Fade off into ULR Land!!

The Price of these has gone up somewhat since I bought my last one in JAN
2008...but at least the shipping has remained the same...$16.00 from JAPAN
to CANADA.

So...Now that I have bought some more Stock Options in Audio Cubes II.....I
guess you're gonna have to put up with me a little while longer here on the
Ultralight Reflector!! Besides...I think I pretty much have TWO of every
other ULR........so I'm sure this SINGLE T615 was feeling a little LONELY!!

I sure hope SONY keeps this PRIMO ULR in their CATALOG for some time....but
just in case....I will sleep a little better now knowing I am covered with
a BACKUP!!

Once again.....for those who have never used a T615......and are a little
GUNSHY due to the price.....but still may be thinking of purchasing
one....I hope my Purchase of a 2nd Unit will re-Inforce any thoughts you
have .....of just how good I feel this Radio is!!

Now I'll be sitting here on Pins and Needles til it arrives and finds a New
Home here in ULR Land!!

73...ROB.

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

Antique/Vintage Radio Enthusiast
Amateur Radio Stations VA3SW/VE3JFC
Enjoy Ultralight Radio DXing......It's like being a KID again!!

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


Re: Welcome Aboard : JOHN PLIMMER

John H. Bryant <bjohnorcas@...>
 

A bit of illness and Holiday celebrations have put me far behind with correspondence.... or I would have been among the first to WELCOME John Plimmer to our Ultralight Community. 

For several reasons, I'm thrilled that he has joined us. First, because John is actually even older than me.... its always comforting to have a few folks out ahead of you on life's winding road.  Secondly, John is the first of what I hope becomes four South Africans to join us here. The four are the hard core of southern African MW DXing and each owns an enviable log book... through their own talent and their fortunate location.  We've compared notes a number of times and have concluded that the South African coast is about as close as civilization has reached to the near perfect MW DXing conditions that I found on Easter Island.... They have a great location!

John, I've been meaning to write to you for some time about the experiences of a good friend of mine, VE7BS, Bob Eldridge.  Bob lives in a narrow valley near Whistler, BC, Canada... the upcoming venue for the Winter Olympics.... Bob is even older than you (obviously an OK guy!) and a vastly experienced radio amateur. His specialty in retirement has been 160 meters (1.8 MHz) over planetary distances. For years, in the 80s and 90s, Bob was one of two North American anchors of something that they called SEANCE.  It was an almost DAILY communications net between Western North America and Eastern Australia + NZ.  Over the first couple of years, they discovered that communications over that path were possible on all but the poorest propagational conditions, often with very modest equipment and antennas.... this was not high-powered, directional stuff. This western NAm to DU link lasted throughout the northern hemisphere Summer 6 months of the year and existed only at Dawn enhancement periods on the North American end.  This kind of link, with modest equipment over several years, in most propagational conditions (at least 50% of the NAm mornings) was considered impossible on 1.8 MHz. until they stumbled on it and then investigated it thoroughly. In the early years of that link, I think that they were unaware of the "Summer DU Season" that was rather familiar to Nick Hall-Patch and others in the MW community.  The two unexpected phenomena were closely related or exactly the same, as far as I can see.

The other piece of this puzzle is that the second North American base station was located in Longmont, Colorado, on the very near east side of the Rocky Mountains. Given the location of the two North American base stations and the relative strengths of signal and lack of power of some of the antenna/tx combinations, some fairly heavy-weight propagational people came to feel that the mode of transmission of these long-haul MW signals was by chordal hop or single-side ducting or similar mode.... not the traditional multi-hop, ground reflection model that most of us visualize.

ANYWAY, the whole point of this story for you, John, is the detailed environment from which VE7BS operates.  The SW, West and NW horizon is totally blocked by the nearby mountains to an angle of almost 45 degrees(the route to Australia is more-or-less West from Bob's place.) When Bob first started hearing the Aussies, he was shocked, given the horizon blockage and supposed low arrival angle of the signals. He did notice about a 30 minute period right before and after local dawn where the signals peaked quite noticeably. His antennas at that time were normal wires, possibly cut to length and possibly a large Delta hung vertically. As they mulled over what they thought was happening, they concluded that at least a significant part of the signals might be arriving at Bob's from a very high angle (vertical?)  Bob hung a Delta loop almost horizontally and it was GREAT....  When he would first hear the Aussies, his low angle antenna worked best, but for a magic 30 minutes or so around dawn, the high angle antenna FAR out-performed his traditional antennas.  On good mornings, the low angle antennas became preferred again very late in the opening, after sun-up.

That experience is the closest that I know about that supports the idea that really long-haul MW signals (at least in the upper half of the band) routinely propagate by ducting or chordal hops and that arrival angles of signals from the dark side (from westerly azimuths) are routinely very near vertical for a period around dawn.

Some of us have noticed supporting trends at Grayland dawn, where the westerly-pointing Beverages routinely seem to lose directivity for a period around dawn.... the NW, W and SW Beverage suddenly are indistinguishable from each other or almost so, for a period of 30 minutes or so at dawn, before directionality returns for the post-dawn late receptions.  This kind of response could also be explained if the arrival angles shifted from low to quite high and then back to low.

This high arrival angle propagation might only be slightly noticeable with normal antennas and receivers, but I suspect that it would leap out at you using a Barefoot Ultralight, John.  Are you like me and many other Old Duffers.... up before dawn on a routine basis???

Glad to hear that you are acquiring an E100 through Guy.  I love the SRF-39FP that you have.... but I USE my E100... You will, too, especially if you are DXing a mixture of 9 and 10 kHz. stations, you are gonna love the E100.

If you find any hint of high arrival angle DX at dawn, I'm certain that we'd all like to hear about it.

WELCOME ABOARD, JOHN!

John B.
Stillwater, OK, USA
Rcvrs: Hotrodded NRD-535, Slider e100's
Antennas: Wellbrook Phased Array


One New UL Log- WEEX-1230

John Cereghin <jcereghin@...>
 


Re: Sony SRF-T615

Gil Stacy
 


Re: Welcome Aboard

John Plimmer <plimmer@...>
 

Hi Gil,
    A big thanks to you and all the others who have welcomed me.
I don't think I will participate in getting the largest number of stations as there aren't too many in this neck of the woods.
My main interest will be to get those distance records and also to see how many countries I can catch from here.
 
But my home QTH is a very bad DX site as it sits in a low valley surrounded by high mountains that block out the low angle DX.
But twice a year I go to the seaside and have some fun, so hope for good results there. Next trip is in March to Seefontein on the Atlantic where good reception of the America's is possible.
 
I'm not overly entranced with my analogue SRF-39FP (extremely difficult to tune), but by good chance my daughter and son in law gave us a very good Christmas allowance and my dear wife of 46 years graciously allowed me to cream $100 off that for a new ultralight. I had already had my sights on a digital Eton E100 and my very good friend Guy Atkins was kind enough to source me a used one at a good price that needs repair. The problem of living here in the third world is that getting anything in our funny money is horrendously expensive and so is the shipping and duties, so the budget is only $50 for the radio and $50 for shipping and duties.
 
Have fun and good DX in the New Year
 
John Plimmer, Montagu, Western Cape Province, South Africa

----- Original Message -----
From: Gil Stacy
Sent: Friday, January 02, 2009 2:44 PM
Subject: [ultralightdx] Welcome Aboard

John,
Welcome aboard.  I've enjoyed reading your DXepedition reports from the Coast of SA over the years.  Your distance loggings are incredible and you could easily challenge the records set from Grayland.
73 Gil NN4CW


Re: Variable caps with offset plates

Russ Edmunds <wb2bjh@...>
 

--- On Fri, 1/2/09, satya@... <satya@...> wrote:
From: satya@... <satya@...>
Subject: Re: [ultralightdx] Variable caps with offset plates
To: ultralightdx@...
Date: Friday, January 2, 2009, 7:37 PM











Hey Russ:



Sounds like Brandon may have that one, which is going for $30 plus

shippping on ebay.



The one I have is item number 170290785350 on ebay, which has three

sections, a reduction geear and linear tuning. May be a better deal,

depending on how the the auction ends up at.



Kevin

___________________



Interesting. It does look like it has a reduction gear, but it says nothing. If you can get it at that price, it's probably a no-lose proposition even without reduction.


Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20id
<wb2bjh@...>
FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
AM: Modified Sony ICF 2010 barefoot


Re: Sony SRF-T615

John H. Bryant <bjohnorcas@...>
 



At 05:49 PM 1/2/2009 -0600, BRANDON J WROTE

Looking for something a little more portable than the E100 Slider, and
especially due to Rob's recommendation, I went ahead and ordered one of
the SRF-T615's from Japan. If I get brave enough to open it up, I may
try and add an 2.5 mm mini-jack external antenna connection if there is
room. Maybe. Has anyone tried this on this model?


Brandon.... You'll LOVE the T615.  I'm rather sure that none of us have opened that beauty to add an external antenna tap.  The set is so small and so beautiful that none of us have wanted to perform surgery.

If I might suggest an alternative:  Make one of those tuned booster bars that Gil Stacy first wrote about 8 months ago or so.... use a fairly small bar.... the 1/2" by 7.5 from Amidon or even a transplanted old bar.... any way, you can put an external pick-up on that Booster Bar just like my article shows doing directly to the internal ferrite bar....  the "Swamping Effect" works on Booster Bar, too. So, then, you hook the external antenna to the booster bar and lay the pristine T615 nearby.  The transfer of energy is not quite as efficient as a direct connection to the radio itself, but its close and VARIABLE.... not a bad thing.

If you open that baby up, PLEASE take us some pictures and post them (or send them to me and I will do so.)

Speaking of which, Brandon, I've been meaning to drop you a note.... Have you posted photos of your final three hook version of the Slider E100???  If so, I missed them and sure would like to see what you did.

You are gonna love the T615!  This last two weeks, I've been DXing about half-time with the Slider E100 hooked to the Wellbrook Array. The other half of the time I've been hunting the upper band with a Barefoot T615.  Love it!

John B.


Re: Variable caps with offset plates

satya@...
 

Hey Russ:

Sounds like Brandon may have that one, which is going for $30 plus
shippping on ebay.

The one I have is item number 170290785350 on ebay, which has three
sections, a reduction geear and linear tuning. May be a better deal,
depending on how the the auction ends up at.

Kevin

The MC325M variables are a linear taper variable. The linear taper does
reduce the issues at the top of the band in terms of 'bunching' and allows
a better peak.

Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20id
<wb2bjh@...>
FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
AM: Modified Sony ICF 2010 barefoot

--- On Fri, 1/2/09, Brandon Jordan <bcdx.org@...> wrote:
From: Brandon Jordan <bcdx.org@...>
Subject: [ultralightdx] Variable caps with offset plates
To: ultralightdx@...
Date: Friday, January 2, 2009, 6:43 PM











I am assuming the "fine tuning" capacitor is mainly for
peaking the

signals at the top portion of the band where things can get a bit

touchy. I have a few Hammarlund MC-325-M variable capacitors that I

picked up off eBay a few years ago for use in an NRC alt-az loop that I

never got around to constructing. This model capacitor is 12 to 325 pf

with special off-set plates, which if memory serves is to allow a linear

adjustment across the entire tuning range instead of "bunching"

everything up in the upper tuning range. Can anyone verify that? I'm

going to dig one out of the box and use it on a box loop project this

weekend.


























Re: Variable caps with offset plates

Russ Edmunds <wb2bjh@...>
 

The MC325M variables are a linear taper variable. The linear taper does reduce the issues at the top of the band in terms of 'bunching' and allows a better peak.

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 Fri, 1/2/09, Brandon Jordan wrote:
From: Brandon Jordan
Subject: [ultralightdx] Variable caps with offset plates
To: ultralightdx@...
Date: Friday, January 2, 2009, 6:43 PM

I am assuming the "fine tuning" capacitor is mainly for peaking the
signals at the top portion of the band where things can get a bit
touchy. I have a few Hammarlund MC-325-M variable capacitors that I
picked up off eBay a few years ago for use in an NRC alt-az loop that I
never got around to constructing. This model capacitor is 12 to 325 pf
with special off-set plates, which if memory serves is to allow a linear
adjustment across the entire tuning range instead of "bunching"
everything up in the upper tuning range. Can anyone verify that? I'm
going to dig one out of the box and use it on a box loop project this
weekend.



Re: Variable caps with offset plates

satya@...
 

Hi Brandon:

By fine-tuning cap, I envision one with perhaps a 0-20 pf range, because
the main tuning cap is so touchy at the high end: one little bump might
change the capacitance by 10 pf.

You have what sounds like a variable cap that doesn't need a fine-tuning
cap for the high end, since the plates are cut such that it results in a
linear "dial" up and down the band. The Sony S5W is among those receivers
that use such a varicap (McKay-Dymek made receivers like that as well),
and it makes tuning the upper band a snap. If it has a reduction gear,
that would be even better - I have a 3-section varicap with reduction gear
that really works well.

My guess is that you may not need a small-value varicap for fine tuning.
I still find one useful even at the lower parts of the band where
extremely fine adjustments are needed, especially if I want to contantly
vary where I am in the passband and fine tweaks to the main tuning cap are
a bit fussy. When not needed, I just open it all the way out and use the
main tuning cap.

Have fun with your loop!

Kevin S
Bainbridge Island, WA

I am assuming the "fine tuning" capacitor is mainly for peaking the
signals at the top portion of the band where things can get a bit
touchy. I have a few Hammarlund MC-325-M variable capacitors that I
picked up off eBay a few years ago for use in an NRC alt-az loop that I
never got around to constructing. This model capacitor is 12 to 325 pf
with special off-set plates, which if memory serves is to allow a linear
adjustment across the entire tuning range instead of "bunching"
everything up in the upper tuning range. Can anyone verify that? I'm
going to dig one out of the box and use it on a box loop project this
weekend.