Subject: GLOWBUGS digest 329

From: [email-masked]
Date: Wed, 23 Oct 1996 11:10:57 -0500 (CDT)

GLOWBUGS Digest 329

Topics covered in this issue include:

  1) Re: Power transformers vs. AF transformers
	by Bill Sorsby <[email-masked]>
  2) Tool Question
	by [email-masked] (John Heck)
  3) Anyone using  a Geloso VFO?
	by "Brian Carling" <[email-masked]>
  4) Re: Where is it?? (fwd)
	by Jeffrey Herman <[email-masked]>
  5) Re: Where is it?? (fwd) (6T9er)
	by [email-masked]
  6) Re: Painting engraved panel markings
	by [email-masked]
  7) SAQ Test on 17.2 kHz.
	by [email-masked]
  8) SAQ 17 KHz
	by "Gregory S. Raven" <[email-masked]>
  9) Re: SAQ Test on 17.2 kHz.
	by "Robert M. Bratcher Jr." <[email-masked]>

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

Date: Tue, 22 Oct 1996 13:29:25 -0500
From: Bill Sorsby <[email-masked]>
To: Art Winterbauer <[email-masked]>
Cc: [email-masked]
Subject: Re: Power transformers vs. AF transformers
Message-ID: <[email-masked]>

Art, what I know of transformer design is that it's a bit of black magic.  I
looked through a couple of books here dealing with the stuff.  There are
many factors transformers designers have to consider;  core material,
efficiency, frequency response, power handling and quite a few others.  Some
of the smaller power transformer can be used in limited audio applications
if frequency response isn't terribly important.  It sounds like the
transformer you've been playing with even has potential.

Fair Radio has a number of audio transformers available inexpensively,
including one with a 62,500 ohm primary and 1340 ohm secondary, which is
nearly a 7:1 ratio transformer.  (turns ratio = Squareroot(Z2/Z1)).  Good
luck with your project.

Regards,
Bill Sorsby, N5BU

***************************************************
[email-masked]
Views expressed herein are no one's fault but mine.
***************************************************

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

Date: Tue, 22 Oct 96 15:14:11 EDT
From: [email-masked] (John Heck)
To: [email-masked]
Subject: Tool Question
Message-ID: <[email-masked]>

Folks,
I have run into some setscrews in vintage gear recently that have a slot shape that
is new to me. Unlike the familiar hex slot, found in Allen setscrews, this slot is
cross shaped. There was a thread last Spring going in the BA list about "Bristol"
drivers. Is this cross shaped slot a "Bristol" slot? If so, where can I buy a set of
drivers for this shape slot? Any help appreciated.
Regards,
John Heck, KC8ETS
Dayton, Ohio
[email-masked]

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

Date: Tue, 22 Oct 1996 18:05:31 +0000
From: "Brian Carling" <[email-masked]>
To: [email-masked]
Subject: Anyone using  a Geloso VFO?
Message-ID: <[email-masked]>

Hi - is anyone else here using, or own a Geloso VFO/Exciter?

I have a model 4/104 with data on this and also on the 4/101 which 
was the older Octal tubes version.

Mine uses 6CL6 to a 5763 - looks restorable.

73 from Radio AF4K / G3XLQ in Gaithersburg, MD USA
[email-masked]
*** See the great ham radio resources at: 
http://www.mnsinc.com/bry/

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

Date: 	Tue, 22 Oct 1996 15:05:17 -1000
From: Jeffrey Herman <[email-masked]>
To: Glowbugs List <[email-masked]>
Subject: Re: Where is it?? (fwd)
Message-ID: <Pine.GSO.3.93.961022150511.27597B-100000@uhunix3>

---------- Forwarded message ----------
Date: Tue, 22 Oct 1996 14:36:19 -1000
From: Jeff Duntemann <[email-masked]>
To: [email-masked]
Subject: Re: Where is it??

At 01:19 AM 9/29/96 -0500, you wrote:
>One source is the 60s and early 70s ARRL Handbook. My '72 edition
>had a 6T9 single tube xmtr in it; if a 6T9 ever falls in my lap
>I'll surely build one.

I built that rig a couple of years ago and it worked beautifully.  I call it
the 69er (6T9er) and I'd still be using it except I pulled the power
transformer for use in something else.

If you're looking for a nice little 5W rig, this is it.

--73--

--Jeff Duntemann KG7JF
  Scottsdale, Arizona

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

Date: Tue, 22 Oct 1996 22:03:35 -0400
From: [email-masked]
To: [email-masked]
Subject: Re: Where is it?? (fwd) (6T9er)
Message-ID: <[email-masked]>

I know the 6T9 is just a 6C4 and some pentode in a single envelope; might not
a 6C4 and 5763 work as well?

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

Date: Tue, 22 Oct 1996 22:06:12 -0400
From: [email-masked]
To: [email-masked]
Subject: Re: Painting engraved panel markings
Message-ID: <[email-masked]>

It's hard to beat a #00 pinstriper's brush and "Sign Painter's One-Shot"
brand enamel...

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

Date: Wed, 23 Oct 1996 05:31:54 -0400
From: [email-masked]
To: [email-masked]
Subject: SAQ Test on 17.2 kHz.
Message-ID: <[email-masked]>

No results here in Vienna, Va.  

Some consumer device was putting out a signal right on 17.2 kHz,  wide and
with 60 Hz sidebands.  It was there last night when I checked the receiver
out, and I had hoped it would be gone in the wee hours, but no such luck.  

I could copy the following stations at my QTH this morning, all with some
kind of machine generated signal:

15.1 kHz HWU Lebinc, France
16.0 kHz GBR Rugby, England
18.1 kHz UMS Former USSR
19.6 kHz GBZ Crigion, Wales
21.1 kHz 3SB PRC
23.4 kHz NPM Lualualue, Hawii
24.0 kHz Cutler, Maine (I could have copied this one with a crystal set,
loud!)

But, alas these are not historic stations.

Hope someone was able to copy SAQ and get a good recording.

73 Bob  [email-masked]

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

Date: Wed, 23 Oct 1996 06:34:01 -0400
From: "Gregory S. Raven" <[email-masked]>
To: [email-masked]
Subject: SAQ 17 KHz
Message-ID: <[email-masked]>

GM-

NIL reception of SAQ here in south Florida.  Drove to a very quiet location
(the Everglades).  I was able to hear Omega navigation signals loud and
clear, and some other transmissions I could not identify.  I listened from
0855 until about 0945.  Absolutely zilch copy.

Hope someone else had better luck.  There was a geomagnetic storm beginning
according to WWV.  Maybe this affected 17 KHz propagation.

73 de Greg KF5N, landline FA
Collector of Landline Telegraph
Secretary/Treasurer TP Chapter MTC
Visit "Telegraph Lore"
http://www.cris.com/~Gsraven/index.shtml
--  . .  . ..  ...  .   .. .  . .  -..  .

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

Date: Wed, 23 Oct 1996 09:35:24 -0500
From: "Robert M. Bratcher Jr." <[email-masked]>
To: [email-masked]
Subject: Re: SAQ Test on 17.2 kHz.
Message-ID: <[email-masked]>

At 09:34 AM 10/23/96 +0000, you wrote:
>No results here in Vienna, Va.  
>
>Some consumer device was putting out a signal right on 17.2 kHz,  wide and
>with 60 Hz sidebands.  It was there last night when I checked the receiver
>out, and I had hoped it would be gone in the wee hours, but no such luck.  
>
>I could copy the following stations at my QTH this morning, all with some
>kind of machine generated signal:
>
>15.1 kHz HWU Lebinc, France
>16.0 kHz GBR Rugby, England
>18.1 kHz UMS Former USSR
>19.6 kHz GBZ Crigion, Wales
>21.1 kHz 3SB PRC
>23.4 kHz NPM Lualualue, Hawii
>24.0 kHz Cutler, Maine (I could have copied this one with a crystal set,
>loud!)
>
>But, alas these are not historic stations.
>
>Hope someone was able to copy SAQ and get a good recording.
>
>73 Bob  [email-masked]
>

Well I had no luck myself on this historic DX in Houston TX. Have to live in
the country I guess! I got all the others meantioned though.

Robert M. Bratcher Jr.
E-mail to:
[email-masked]
Record collector, 8mm, super 8, 16 and 35mm Film collector.
I like old radio's too.
Collins, Hallicrafters, National & Hammurland are my Favorites!

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End of GLOWBUGS Digest 329
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