Subject: GLOWBUGS digest 334

From: [email-masked]
Date: Mon, 28 Oct 1996 10:13:05 -0600 (CST)

GLOWBUGS Digest 334

Topics covered in this issue include:

  1) Re: Hammarlund Coil Forms
	by [email-masked]
  2) RCA PARTS: MOST WITH PRICES lets try again
	by "Robert Fowle  (KC8DBC)" <[email-masked]>
  3) Dave Ishmael on E-Mail???
	by "James P. Rybak" <[email-masked]>
  4) Tube tester
	by "Brian Carling" <[email-masked]>
  5) 1 tube transmitters
	by [email-masked] (Steve Moll)
  6) Re: Tube tester
	by Richard Wilkerson <[email-masked]>
  7) Lurker Needs Knight T-60 Ckt.
	by "Edward A. Stagl" <edstagl>
  8) Re: 1 tube transmitters
	by "Brian Carling" <[email-masked]>
  9) Tip Plugs & Tip Jacks for Headphones??
	by "James P. Rybak" <[email-masked]>
 10) Scanned Schematics
	by Gordon Gekko <[email-masked]>
 11) Re: Scanned Schematics
	by "Robert M. Bratcher Jr." <[email-masked]>
 12) Re: Hammarlund Coil Forms
	by [email-masked]
 13) Re: Scanned Schematics
	by "Brian Carling" <[email-masked]>
 14) Re: Tip Plugs & Tip Jacks for Headphones??
	by "Brian Carling" <[email-masked]>
 15) Need dial cord
	by Tom Bowman <[email-masked]>
 16) Re: Scanned Schematics
	by "Claton Cadmus" <[email-masked]>
 17) RCA HB-3
	by [email-masked] (Steve Linscott)
 18) Re: Need dial cord
	by [email-masked] (John Heck)
 19) Re: Homebrew UX-201A regen grid leak value?
	by [email-masked]
 20) Re: Tip Plugs & Tip Jacks for Headphones??
	by [email-masked]

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

Date: Sun, 27 Oct 1996 12:50:42 -0500
From: [email-masked]
To: [email-masked]
Subject: Re: Hammarlund Coil Forms
Message-ID: <[email-masked]>

The standard Hammarlund coil forms are 1.5 inch diameter and 2.5 inch long.
 I have extra 5 pin and 6 pin Hammarlund forms, used but eaisly rewound, that
I am willing to trade for other glowbug parts.

73,  Eric WD6DGX

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

Date: Sun, 27 Oct 1996 16:02:13 -0400
From: "Robert Fowle  (KC8DBC)" <[email-masked]>
To: [email-masked]
Subject: RCA PARTS: MOST WITH PRICES lets try again
Message-ID: <[email-masked]>

I have tryed to assign prices to this stuff...there is some that will have
to be 'offer' still....if you'd like to get a copy of this list (again)
email me..
thanks

=================================================]-[->
Robert Fowle      KC8DBC
The HAMMARLUND Historian
Ph. 517-789-6721
1215 Winifred
Jackson, Mich. 49202-1946
E-mail:  [email-masked]
Web Page:  http://www.jacksonmi.com/hammarlund
                 HAMMARLUND LITERATURE WANTED
WANTED: MANUALS FOR ANY MAKE RADIO EQUIPMENT
=================================================]-[->
Boatanchors: the list: [email-masked]......subscribe boatanchors
<your name>
       the news group: rec.radio.amateur.boatanchors
             news group: ham-am@[email-masked]....Body: add ham-am		

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

Date: Sun, 27 Oct 1996 13:33:49 -0700 (MST)
From: "James P. Rybak" <[email-masked]>
To: Glowbugs <[email-masked]>
Subject: Dave Ishmael on E-Mail???
Message-ID: <[email-masked]>

Does anyone know if Dave Ishmael, WA6VVL, is on e-mail?  If so, what is 
his e-mail address?

Thanks.

Jim  W0KSD

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

Date: Sun, 27 Oct 1996 14:08:50 +0000
From: "Brian Carling" <[email-masked]>
To: [email-masked]
Subject: Tube tester
Message-ID: <[email-masked]>

OK guys - did I make a big mistake?
I bought a tube tester today and found out that it has some 
limitations.
It is a I-177-B tester.

It needs a socket adapter kit MX-949/U and will not test a lot of 
tubes without that socket adapter kit.
Does anyone have one? Or any ideas where I might find one?

It was not expensive and is in better shape than MOST 45 year-old 
tube testers I have seen!

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

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

Date: Sun, 27 Oct 1996 15:28:30 -0600 (CST)
From: [email-masked] (Steve Moll)
To: [email-masked]
Subject: 1 tube transmitters
Message-ID: <[email-masked]>

Hello,

I've been following the messages for a while and while this probably has 
been posted previously, can anyone assist with locating plans to build a 
single tube transmitter using a 6V6, 6L6, 6K6, or 6W6.  I would be most 
grateful and will pay any mailing or copying expense.  Does anyone have 
anything like this in a graphical GIF or JPEG format?

Many thanks,

Steve Moll WA0BPU

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

Date: Sun, 27 Oct 1996 15:28:38 +0000
From: Richard Wilkerson <[email-masked]>
To: [email-masked]
Subject: Re: Tube tester
Message-ID: <[email-masked]>

Brian Carling wrote:
> 
> OK guys - did I make a big mistake?
> I bought a tube tester today and found out that it has some
> limitations.
> It is a I-177-B tester.
> 
> It needs a socket adapter kit MX-949/U and will not test a lot of
> tubes without that socket adapter kit.
> Does anyone have one? Or any ideas where I might find one?
> 
> It was not expensive and is in better shape than MOST 45 year-old
> tube testers I have seen!
> 
> Bry, AF4K
> 73 from Radio AF4K / G3XLQ in Gaithersburg, MD USA
> [email-masked]
> *** See the great ham radio resources at:
> http://www.mnsinc.com/bry/....
OK while on the subject..I have a old Electronic Measurements Corp. tube 
tester..model 204..can anyone tell me anything about it??  Thanks Rich 
WD6FDD.

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

Date: Sun, 27 Oct 1996 23:53:54 +0000
From: "Edward A. Stagl" <edstagl>
To: [email-masked]
Subject: Lurker Needs Knight T-60 Ckt.
Message-ID: <19961027235350.AAB2520@LOCALNAME>

Hi to everyone,  Enjoy the list and all the comments and questions 
and I have learned a great deal in the past few months from the many 
in-depth and detailed responses. 

Although I built a regenerative receiver as a 12-year old
( with help from an older brother ), my interests in radio and 
electronics have been somewhat latent and sporadic over the years.  
I did manage to build a few small projects, some with 
tubes...( it was quite a thrill to hear Big Ben on BBC ) and more recently, 
a solid state QRP transceiver ( sorry for the 2 counts of blasphemy )...
that produced a few thrills of it's own !!

Now, in atonement, I'm starting to rebuild a Knight T-60 transmitter. 
If anyone in the group has a manual or just the ckt for that rig,
please let me know.  ( I will gladly pay for copying, S&H, etc )

73  Ed  N2GVS               [email-masked]

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

Date: Sun, 27 Oct 1996 18:40:27 +0000
From: "Brian Carling" <[email-masked]>
To: [email-masked] (Steve Moll)
Subject: Re: 1 tube transmitters
Message-ID: <[email-masked]>

HEY! It's a reply from AF4K!
On 27 Oct 96, Steve Moll wrote:

> Hello,
> 
> I've been following the messages for a while and while this probably
> has been posted previously, can anyone assist with locating plans to
> build a single tube transmitter using a 6V6, 6L6, 6K6, or 6W6.  I
> would be most grateful and will pay any mailing or copying expense. 
> Does anyone have anything like this in a graphical GIF or JPEG
> format?

Some of us are working on it Steve!
Slow progress here because the scanner software eats up so darn much 
hard drive space!
73 from Radio AF4K / G3XLQ in Gaithersburg, MD USA
[email-masked]
*** See the great ham radio resources at: 
http://www.mnsinc.com/bry/

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

Date: Sun, 27 Oct 1996 19:53:11 -0700 (MST)
From: "James P. Rybak" <[email-masked]>
To: Glowbugs <[email-masked]>
Subject: Tip Plugs & Tip Jacks for Headphones??
Message-ID: <[email-masked]>

Does anyone know where I can get some of the old style tip plugs and tip 
jacks like used to be used with high impedance headphones?  I need to do 
some repairs.

Thanks.

Jim  W0KSD

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

Date: Sun, 27 Oct 1996 19:16:06 -0800 (PST)
From: Gordon Gekko <[email-masked]>
To: [email-masked]
Subject: Scanned Schematics
Message-ID: <[email-masked]>

Just an update on the schematic scanning:

I will be scanning all of the original schematics tomorrow and Tuesday
to be made availalble to the group.  I am experimenting with ways to
get .jpg and .gif formats to retain the subtle detail of the originals.
The .bmp format seems, from my experience scanning schematics, far superior
to the compressed formats.  The other methods tend to drop out little details
on the horizontal plane, such as ciruit lines and part values.  But I
will come up with something that works for everyone, I am sure.

Opinion Poll:

I have an extra computer (486-66) that is in my ham shack that has a 1 gig hard
drive, most of which is totally unused.  If there is a general interest in 
the scanned schematics, I would be happy to start an archive. The way it
would work
is anyone with a hard copy could send me a copy, and I would scan it and index
the project.  Anyone with an already scanned image could email it to me and I 
would do the same.  I would post regular updates listing what new circuits I 
have available.  As long as the volume of submissions was sane, I wouldn't mind 
taking on the project, if there is interest.

Please post your opinions to the group if you think this would be a worthwhile
project.

Meantime, look for a list of stuff I now have in the next day or so.

73's

Dave
[email-masked]

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

Date: Sun, 27 Oct 1996 22:44:47 -0600
From: "Robert M. Bratcher Jr." <[email-masked]>
To: [email-masked]
Cc: [email-masked]
Subject: Re: Scanned Schematics
Message-ID: <[email-masked]>

At 03:17 AM 10/28/96 +0000, you wrote:
>        
>
>Just an update on the schematic scanning:
>
>I will be scanning all of the original schematics tomorrow and Tuesday
>to be made availalble to the group.  I am experimenting with ways to
>get .jpg and .gif formats to retain the subtle detail of the originals.
>The .bmp format seems, from my experience scanning schematics, far superior
>to the compressed formats.  The other methods tend to drop out little details
>on the horizontal plane, such as ciruit lines and part values.  But I
>will come up with something that works for everyone, I am sure.
>

I have no problem with the BMP format myself. If you lose detail with
compressed formats then it's not worth it. Just save all the detail in BMP.

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!

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

Date: Sun, 27 Oct 1996 21:42:05 -0700 (MST)
From: [email-masked]
To: [email-masked]
Cc: [email-masked]
Subject: Re: Hammarlund Coil Forms
Message-ID: <[email-masked]>

On Sun, 27 Oct 1996 [email-masked] wrote:

> The standard Hammarlund coil forms are 1.5 inch diameter and 2.5 inch long.
>  I have extra 5 pin and 6 pin Hammarlund forms, used but eaisly rewound, that
> I am willing to trade for other glowbug parts.

> 73,  Eric WD6DGX

   Hello,
   
   Thanks very much for the information.  Most of these forms vary
   between 1 1/4" and 1 1/2", so it is helpful to know "fer shur".

   I'm into "rolling my own" for now, so I'm going to fudge my forms with
   PVC, ABS, or dowel.  I wish that I had enough stuff for trading stock!
   However, I'm still building up a "junque boxe".
   
   Today I latched on to some useful TV tubes which I can use for regens 
   and low-powered Hartleys.  Great price, free!  (Nice to have a brother 
   who saves old TV chassis.)
   
   I got a dwarf-clone of the 6SN7 (medium mu twin triode) in the form of
   an 8CG7/8FQ7.  It's great because, except for less power, it's
   identical electrically, and is common in 70's hybrid TV sets.  It will
   work well in 45 volt battery B+ two-tubers, just like the 6J5 and
   6F8G relatives of the 6SN7.
   
   A favorite QST article of mine uses a 6F8G in the classic two-tuber
   format (one 6F8G), with 3VDC (sez it woiks better!) on the heater, so
   I'm guessing that 4.5VDC should work nicely with the 8 volt midget
   upstart.  (QST, JUNE 1938 "A Simple One-Tube Receiver")

   Should also work with lower plate voltage in Bob Keys "Grammer"
   Hartley.
   
   Also got some 6GH8A tubes which appear to be a plug-in replacement
   for 6U8A's.   Several Lew McCoy projects favour the 6U8A, so I'm
   saving these for such.  The triode section of either is medium mu,
   very much like 6J5's (with the pentode section not used).
   
   For battery two-tubers which seek to emulate #30's, 01A's, 99's, 1H4G's
   (at least electrically), these TV minis would be worthwhile, I think.

   I would think that these tubes should be easy to scrounge locally
   just about anywhere in North America, so I thought that I would
   mention them to the group for consideration.  (I do ramble.)

   Thanks again for the coil form info, Eric. 

   ****************************************** 
  ** Shane <[email-masked]> **              
   ******************************************               
        ** Edmonton, Alberta, Canada **                 
         *****************************       

             

 

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

Date: Mon, 28 Oct 1996 03:18:03 +0000
From: "Brian Carling" <[email-masked]>
To: [email-masked], [email-masked]
Subject: Re: Scanned Schematics
Message-ID: <[email-masked]>

HEY! It's a reply from AF4K!
On 27 Oct 96, Gordon Gekko wrote:

> Opinion Poll:
> 
> I have an extra computer (486-66) that is in my ham shack that has a
> 1 gig hard drive, most of which is totally unused.  If there is a
> general interest in the scanned schematics, I would be happy to
> start an archive. The way it would work is anyone with a hard copy
> could send me a copy, and I would scan it and index the project. 
> Anyone with an already scanned image could email it to me and I
> would do the same.  I would post regular updates listing what new
> circuits I have available.  As long as the volume of submissions was
> sane, I wouldn't mind taking on the project, if there is interest.
> 
> Please post your opinions to the group if you think this would be a
> worthwhile project.

Yes, yes! I will do my scanning to .BMP format also.
I have been displeased with the results of scans to JPG and GIF 
format when it involves B/W images for the same reasons you cite.

I have no such luxury of a 1 gig HD. Mine is 220 Meg and has to 
accomodate EVERYTHING I use!

I have the Microtek Page Wiz scanner here ready to go, but have never 
used it due to low space on drive!

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

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

Date: Mon, 28 Oct 1996 03:18:03 +0000
From: "Brian Carling" <[email-masked]>
To: [email-masked], [email-masked]
Subject: Re: Tip Plugs & Tip Jacks for Headphones??
Message-ID: <[email-masked]>

HEY! It's a reply from AF4K!
On 27 Oct 96, James P. Rybak wrote:

> Does anyone know where I can get some of the old style tip plugs and
> tip jacks like used to be used with high impedance headphones?  I
> need to do some repairs.
> 
> Thanks.
> 
> Jim  W0KSD

James I am pretty sure I saw a parts dealer with some at the hamfest 
I went to yesterday.

Either Bill Barrick
(610) 933-0369
or

Sauder Electronics
(717) 865-5001

Both are in PA.
I hope that helps you.
73 from Radio AF4K / G3XLQ in Gaithersburg, MD USA
[email-masked]
*** See the great ham radio resources at: 
http://www.mnsinc.com/bry/

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

Date: Mon, 28 Oct 1996 07:06:12 -0400
From: Tom Bowman <[email-masked]>
To: [email-masked]
Subject: Need dial cord
Message-ID: <[email-masked]>

I have two receivers that need their dials restrung and I'm looking for a
few feet of quality 
dial cord. As a kid - gee, I guess that's 40 years ago - I remember spools
of the 
General Cement stuff on a shelf in the local parts store.

Well, the parts store was torn town long ago and a 24-hour convenience store
stands 
where I bought resistors, capacitors and an occasional tube. But my S-38C and
my friend's National receiver need dials restrung.

Anyone willing to sell me a spool of the dial cord or at the least about 10
or 12  foot of it?

Thanks much,

Tom
WA3REY

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

          Tom Bowman, WA3REY  <><      Mount Gretna, PA 17064    [email-masked]

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

Date: Mon, 28 Oct 1996 07:34:18 -0600
From: "Claton Cadmus" <[email-masked]>
To: <[email-masked]>, "Multiple recipients of list" <[email-masked]>
Subject: Re: Scanned Schematics
Message-ID: <[email-masked]>

Gordon wrote:

> The .bmp format seems, from my experience scanning schematics, far
superior
> to the compressed formats.  The other methods tend to drop out little
details
> on the horizontal plane, such as ciruit lines and part values.  But I
> will come up with something that works for everyone, I am sure.

Leave them in .bmp format and then compress them with PkZip.   This will
give you a file size about the same as a gif, but retain the detail.

Hope this helps.

Claton Cadmus			|73 de KA0GKC
Application Technologies Inc.	|ARRL, QRP-ARCI, NorCal
Ph.  (612)926-8886		|ARCC, MNQRP&HB Society
Fax  (612)926-8545 		[email-masked]	
E-mail  [email-masked]	|ka0gkc@wb0gdb.#stp.mn.us

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

Date: Mon, 28 Oct 1996 08:13:21 -0600 (CST)
From: [email-masked] (Steve Linscott)
To: [email-masked]
Subject: RCA HB-3
Message-ID: <v01540b01ae9a29380ce3@[128.42.14.170]>

I got lots of proposals, and the books have found a new home.  Thanks to
all who responded.

                                         73 de W5EGP

                                                  - Steve -

******************************************************************************
*     Steve Linscott        Divisional Consultant        Natural Sciences    *
*   Rice University     6100 South Main Street    Houston, Texas 77005-1892  *
*    Phone: (713) 527-4985   FAX: (713) 527-6099   Email: [email-masked]   *
******************************************************************************

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

Date: Mon, 28 Oct 96 09:26:12 EST
From: [email-masked] (John Heck)
To: [email-masked], [email-masked]
Subject: Re: Need dial cord
Message-ID: <[email-masked]>

Folks,
If you don't already have a copy of the catalog from
Antique Electronic Supply
6221 South Maple Avenue
Tempe, Arizona 85283
(602)-820-5411
FAX (800)-706-6789
you oughta get one because it has a lot of this kinda stuff in it. Phone tips, and
dial cord, and tube bases and coil forms, etc.
REgards,
John Heck, KC8ETS
Dayton, Ohio
[email-masked]
> I have two receivers that need their dials restrung and I'm looking for a
> few feet of quality 
> dial cord. As a kid - gee, I guess that's 40 years ago - I remember spools
> of the 
> General Cement stuff on a shelf in the local parts store.
> 
> Well, the parts store was torn town long ago and a 24-hour convenience store
> stands 
> where I bought resistors, capacitors and an occasional tube. But my S-38C and
> my friend's National receiver need dials restrung.
> 
> Anyone willing to sell me a spool of the dial cord or at the least about 10
> or 12  foot of it?
> 
> Thanks much,
> 
> Tom
> WA3REY
> 
> -----------------
> 
>           Tom Bowman, WA3REY  <><      Mount Gretna, PA 17064    [email-masked]
> 
> 

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

Date: Mon, 28 Oct 1996 10:49:00 -0500 (EST)
From: [email-masked]
To: [email-masked]
Cc: [email-masked] (), [email-masked]
Subject: Re: Homebrew UX-201A regen grid leak value?
Message-ID: <[email-masked]>

> So I need suggestions for the following: what is the proper filament
> and plate voltage for a UX-201A tube? And what value resistor (if that's
> all I need) should I use for the leak, 'til I can scrounge up a real McCoy?

Typically in regen detector use, the filament voltage was a 6 v battery
run through the filament control resistor to give about 4 volts on the
filament.  The usual voltage under normal usage was 5 volts.  But, they
should be run in general detector service at the LOWEST voltage possible
consistent with good gain and smooth regeneration.  On my set, that value
can be anywhere from about 3.75 volts up to about 4.5 volts, usually best
at right around 4.0 volts on the detector filament and first audio filament.
That is with output to tin can fones.

Plate voltages in detector service were typically 22.5-45 volts.  I prefer
36 volts, and that gives me the best amplification and regeneration control.
Audio stages usually ran 45 volts or 67.5 volts although sometimes they
were run at 90 volts.  Only in big broadcast sets were they run at the
max of 135 volts in audio service.  Try to use the lowest voltages that
give good regeneration and reasonable gain.  When the higher voltages are
used (above 45 volts) you need to use proper C- biasing on the audio
grids or they will not work quite as well.

The grid resistor typically was 1 to 3 meg ohms.  In my receivers I prefer
a higher value, typically 10 meg ohms for best sensitivity.  It depends a
lot upon the value of grid capacitor.  Usually grid capacitors for low HF
and MF are in the neighborhood of 250pf.  If it is that size, then stick
to a 1 to 3 meg ohm leak.  If it happens to be 100pf, try the 10 meg ohm
size.  The grid resistors are cartridges that have small pointed brass
knobs on each end and the point of the knob fits into the holes in the
grid leak mounts (screwed to the grid capacitor terminals).  They are not
very common, but do surface occasionally at antique radio hamfests.  I am
sure there are a few floating around the BA/GB circles.  I may have a
spare one if I dig a little.

> This thing has tapped coils so maybe I can get it on the 80m GB
> freq sometime. :-)

Tapped coils would be strange on a traditional regen set.  If the coils
are 4 pin, they usually will have the main tuning and a ticker winding.
If the coils are 5 pin they will typically have an added antenna coil
grounded together with the bottom of the main tuning coil.  If they are
6 pin, then the antenna coil comes out separately on both ends.
Tapped coils might possibly be used with LF or MF coils, but generally
not for amateur coils on 200 meters and down.  The tap would usually
be the antenna connection point.

> 73,
> --Andy
> [email-masked]

My intuition would suggest that it was probably a broadcast receiver
design modified for 200 meters and down operation in amateur use.

Sounds like you have a good basis for a great little receiver, Andy!

73/ZUT DE NA4G/Bob UP

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

Date: Mon, 28 Oct 1996 10:54:47 -0500 (EST)
From: [email-masked]
To: [email-masked]
Cc: [email-masked] (), [email-masked]
Subject: Re: Tip Plugs & Tip Jacks for Headphones??
Message-ID: <[email-masked]>

> Does anyone know where I can get some of the old style tip plugs and tip 
> jacks like used to be used with high impedance headphones?  I need to do 
> some repairs.
> 
> Thanks.
> Jim  W0KSD

AES has them at 5 bucks for a pack of 10, according to their new 1997 catalog.
73/ZUT DE NA4G/Bob UP

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

End of GLOWBUGS Digest 334
**************************