20001005.ba v03_n001.bam.20001005

>From ???@??? Sat Oct 07 01:24:46 2000
Date: Thu,  5 Oct 2000 12:57:38 CDT
From: Old Tube Radios <boatanchors@theporch.com>
To: Old Tube Radios <boatanchors@theporch.com>
Subject: BOATANCHORS digest 3001
Message-Id: <20001005180127.2BB49303@devel43.theporch.com>

			    BOATANCHORS Digest 3001

Topics covered in this issue include:

  1) My new web site
	by michael watts <wy6k@yahoo.com>
  2) Re: GB> Hmmmmm....
	by "Don Ehrlich" <ehrlich@olypen.com>
  3) 75A-3 product detector????
	by MODSTEPH@ACS.EKU.EDU
  4) Re: GB> Hmmmmm....
	by Arden Allen <gumbear@pacbell.net>
  5) Re: GB> Hmmmmm....
	by "Richard Brunner" <rbrunner@gis.net>
  6) RE: My new web site
	by "Bill Hawkins" <bill@iaxs.net>
  7) Re: 75A-3 product detector????
	by Don Reaves <dr@cei.net>
  8) Tool Box Needed
	by Dick Dillman <ddillman@igc.org>
  9) Re: Replacement transistor in CU-5069 multicoupler
	by "James C. Garland" <4cx250b@miavx1.acs.muohio.edu>
 10) RE: BA Batteries info
	by "ROBERT W. DOWNS" <RWDowns_WA5CAB@compuserve.com>
 11) Re: Replacement transistor in CU-5069 multicoupler
	by Al Klase <skywaves@bw.webex.net>
 12) RE: Six Metres, anyone?
	by "Ed Sieb" <sieb@sympatico.ca>
 13) RE: Shure Hand Mic
	by "Ed Sieb" <sieb@sympatico.ca>
 14) TR4 fs
	by "w2tu" <w2tu@email.msn.com>
 15) Forest Service Radio Type KU-R
	by Paul Thekan <Paul.Thekan@eimac.cpii.com>
 16) Re: Replacement transistor in CU-5069 multicoupler
	by "Mike Feher" <n4fs@monmouth.com>
 17) ADMINISTRIVIA: Using The Archives
	by listown@jackatak.theporch.com (Mail List Owner)
 18) Eico mpx adapter
	by Richard Post <post@ouvaxa.cats.ohiou.edu>
 19) WTB Tek 543 Manual, for Museum.
	by Roy Morgan <roy.morgan@nist.gov>
 20) Wrapping Power Tubes??wq
	by John Poulton <jp@cs.unc.edu>

----------------------------------------------------------------------
Message-ID: <20001004232735.99847.qmail@web3208.mail.yahoo.com>
Date: Wed, 4 Oct 2000 16:27:35 -0700 (PDT)
From: michael watts <wy6k@yahoo.com>
Subject: My new web site
To: Old Tube Radios <boatanchors@theporch.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii

At least one guy has had trouble getting the pretty
little glowing buttons on my web site to load.  If you
have similar problems, would you please let me know. 
If enough people have this problem, I'll have to deep
six the glowing buttons and go back to something
simpler.

For that matter, if you have problems with any other
parts of the site let me know that too so I can fix
it.

Thanks!
Mike wy6k

www.qsl.net/wy6k

__________________________________________________
Do You Yahoo!?
Yahoo! Photos - 35mm Quality Prints, Now Get 15 Free!
http://photos.yahoo.com/

------------------------------
Message-ID: <005001c02e66$a52cea60$57f9cdd0@fpfzqlga>
From: "Don Ehrlich" <ehrlich@olypen.com>
To: Old Tube Radios <boatanchors@theporch.com>
Cc: "boatanchor message" <boatanchors@theporch.com>
Subject: Re: GB> Hmmmmm....
Date: Wed, 4 Oct 2000 17:46:44 -0700
MIME-Version: 1.0
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	charset="iso-8859-1"
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Ken,

I have had several rcvrs with that problem.  My HQ180 was the latest one.
After eliminating all of the obvious possibilities the HF oscillator was
found to be the culprit.  Changing tubes affected how severe it was, but
nothing cured the problem until I put DC on the filament.  Believe me, I
tried every kind of isolation and bypassing imaginable.  The hum did not
show up on an oscilloscope ... and I think  was probably was due to fm of
the hf oscillator.  This kind of hum can be identified by the fact that (in
my experience anyway) the hum is much worse on higher frequency bands where
a greater frequency deviation occurs.

Don K7FJ

> Another Q for the group.
>
> My HQ-110-C is quiet as a graveyard on either AM or CW with no
> signal.
>
> CW signals are hum-modulated. Substituted a new BFO/OSC tube.
> Still have it. Sounds like a cathode to grid or to filament leak to me,
but
> can't find it.
>
> Ideas?
>
> Ken W7EKB
>

------------------------------
Date: Wed, 04 Oct 2000 21:41:39 -0400 (EDT)
From: MODSTEPH@ACS.EKU.EDU
Subject: 75A-3 product detector????
To: Old Tube Radios <boatanchors@theporch.com>
Message-id: <01JUYCYUDW3M005ZFX@ACS.EKU.EDU>
MIME-version: 1.0
Content-type: TEXT/PLAIN; CHARSET=US-ASCII

Gang,

     Swapped for a decent 75A-3 (one filter - 3.1 kcs) and
got thinking... with that NBFM plug-in place, surely somebody
out there has put in a good product detector.  Anyone know
if/where/when such plans may be?

     And of course if anyone has the spare 800 cycle filter
(F455B 8something, I think) I'd like to hear from them.

     TIA

     73,  Al  N5AIT

------------------------------
Date: Wed, 04 Oct 2000 19:01:16 -0700
From: Arden Allen <gumbear@pacbell.net>
Subject: Re: GB> Hmmmmm....
To: Old Tube Radios <boatanchors@theporch.com>
Cc: boatanchor message <boatanchors@theporch.com>
Message-id: <0G1X005H4PK13Y@mta5.snfc21.pbi.net>
MIME-version: 1.0
Content-type: text/plain; charset=ISO-8859-1
Content-transfer-encoding: 7bit

Hi Don;

> I have had several rcvrs with that problem.  My HQ180 was the latest one.
> After eliminating all of the obvious possibilities the HF oscillator was
> found to be the culprit.  Changing tubes affected how severe it was, but
> nothing cured the problem until I put DC on the filament.  Believe me, I
> tried every kind of isolation and bypassing imaginable.  The hum did not
> show up on an oscilloscope ... and I think  was probably was due to fm of
> the hf oscillator.  This kind of hum can be identified by the fact that
(in
> my experience anyway) the hum is much worse on higher frequency bands
where
> a greater frequency deviation occurs.
> ..........

I'm gonna postulate another cause:  The heater circuit is getting into the
act at RF.  There is some kind of diode action going on between heater and
cathode causing the impedance of the incidental RF circuit to be modulated
at 60 Hz.  Try bypassing the heater lead at the tube socket (if not already
done) or try isolating the heater from the rest of the world with a few
tens of microhenry RF choke.  See what happens and let us know.

Arden  Allen   KB6NAX   Vallejo, CA   gumbear@pacbell.net

------------------------------
Message-ID: <00ee01c02e75$2ecfde40$db1f29d8@tneltcds>
From: "Richard Brunner" <rbrunner@gis.net>
To: Old Tube Radios <boatanchors@theporch.com>
Subject: Re: GB> Hmmmmm....
Date: Wed, 4 Oct 2000 22:36:34 -0400
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

Re: Hum modulation of HF local oscillators.

It may be heater to cathode emission which is modulating the oscillator.
(Ref: Radiotron Designer's Handbook)  Try feeding the oscillator heater from
a separate transformer, with no ground connection, and lift it about 20
volts above ground with a high impedance voltage divider across the B+.
When the heater is positive with respect to the cathode, there can be no
emission and no modulation.  This worked fine with my SW-3; hum went WAY
down.

Richard Brunner, AA1P, rbrunner@gis.net

------------------------------
From: "Bill Hawkins" <bill@iaxs.net>
To: Old Tube Radios <boatanchors@theporch.com>
Subject: RE: My new web site
Date: Wed, 4 Oct 2000 22:04:13 -0500
Message-ID: <000601c02e78$f0a3e540$290aa8c0@darius>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

Mike,

For what it's worth, I am not a magpie. I am not attracted to
glittering things or other forms of dancing baloney. If you've
got something to say, say it simply. Omit the fancy backgrounds
that make text hard to read. The text contains your message. The
background is a distraction that took time to download.

Pictures are essential - they are each worth a thousand words
or more. But let me select the ones I want to see in detail,
instead of playing Solitaire while all of them download.

Never mind that certain feature-rich web page editors tempt you
with all kinds of distractions. Marketing people never did
understand that the idea is to convey information, not vaporous
things that do not condense into reality. It may work for the
folks who will buy anything on TV if it's under $20 (but wait,
there's more ...) but that's not who you're aiming at, is it?

OBBA (obligatory BA content) There's a discussion going on in
the R390 list about the differences in design of R-390 regulated
power supplies. Seems that later models regulate to closer
tolerances, but the manuals say the circuits are the same. I've
got an old manual that says they're different. Any others?

Regards,
Bill Hawkins

Any BA sites of interest in Amsterdam on the 13th and 14th?

------------------------------
Date: Wed, 4 Oct 2000 22:38:35 -0500 (CDT)
From: Don Reaves <dr@cei.net>
To: Old Tube Radios <boatanchors@theporch.com>
cc: Old Tube Radios <boatanchors@theporch.com>
Subject: Re: 75A-3 product detector????
Message-ID: <Pine.LNX.4.10.10010042230400.2847-100000@wa5bbs.radiohome.com>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

Al, Take a look at the Universal Services Product Detector, which was a
plug in for that NBFM socket, with minimal invasive surgery.  You can see
the full manual at www.militaryradio.com, including schematic.  Looks easy
enough to build in a minibox if you are handy with a hole punch and a
soldering iron.


Regards,

Don Reaves
W5OR

------------------------------
Message-Id: <3.0.5.32.20001004212202.007bb690@pop.igc.org>
Date: Wed, 04 Oct 2000 21:22:02 -0700
To: Old Tube Radios <boatanchors@theporch.com>
From: Dick Dillman <ddillman@igc.org>
Subject: Tool Box Needed
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"


I need a new tool box.  My faithful brown Kennedy box has served well over
many years.  But it's too small.  I could buy something new at Sears I
suppose but that would be too easy.  No, what I'm hoping for is something
classic, something along the lines of the tool boxes TV and radio service
people carried when they made house calls.  These were like the tube
caddies but had spaces mainly for a tools, a VOM, soldering stuff and so on.

Does anyone have one of htese they'd ben willing to part with or know where
one might be found?  All leads appreciated.

Regards,

Dick


                          Dick Dillman, W6AWO
          Member of the Maritime Radio Historical Society
                      Collector of Heavy Metal:
               Harleys, Willys and Radios Over 100lbs.

------------------------------
Message-Id: <4.2.0.58.20001005065022.00a64798@miavx1.muohio.edu>
Date: Thu, 05 Oct 2000 07:08:43 -0400
To: Old Tube Radios <boatanchors@theporch.com>
From: "James C. Garland" <4cx250b@miavx1.acs.muohio.edu>
Subject: Re: Replacement transistor in CU-5069 multicoupler
Cc: "boatanchors@theporch.com" <boatanchors@theporch.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; format=flowed

Hi Don,
I've also had the 2N5160 go dead in my CU-5069. Turns out the 2N5160 is a 
general purpose PNP low gain device, with thousands of adequate 
substitutions. I believe I replaced mine with a 2N2905 (might have been a 
2N2907) from my junkbox, but any general purpose PNP transistor in the same 
package (TO-5) should work. The amplifier stage is such low gain that the 
frequency response of the transistor isn't really important (as I recall 
the 2N5160 is rated mostly for audio work). Be sure you put heat sink 
compound on the case and use the supplied heatsink.

Speaking of heat, it's also not a bad idea to reduce the heat dissipation 
of the CU-5069. I run mine off of 110V and set the internal voltage down to 
about 24 Volts. The unit runs hot because all those transistors are biased 
for linear service. Some people cool the units with a muffin fan, but I've 
not bothered. Mine runs 24 hours/day.

73,

Jim Garland W8ZR




>Back to the RCA CU-5069 m/c unit - some time ago I found one of my units
>had gone very dead - the 2N5160 in the hi level driver stage was gone.
>This transistor doean't appear in any cross refs I have, or any of the
>parts houses either, and internet searchs haven't been too helpful either.
>Any ideas for a source or a good bet for a sub?
>
>
>73 Don
>VE6JY
>
>VE6JY  Don Moman               email: ve6jy@freenet.edmonton.ab.ca
>Box 127 Lamont, Alberta        email forwarding: ve6jy@rac.ca
>CANADA  T0B 2R0



******************************************************************
W8ZR Amateur Radio Website: http://www.muohio.edu/~4cx250b/web/
******************************************************************

------------------------------
Date: Thu, 5 Oct 2000 08:05:03 -0400
From: "ROBERT W. DOWNS" <RWDowns_WA5CAB@compuserve.com>
Subject: RE: BA Batteries info
To: Old Tube Radios <boatanchors@theporch.com>
Message-ID: <200010050805_MC2-B5C7-3BCD@compuserve.com>
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
	 charset=ISO-8859-1
Content-Disposition: inline

Larry,

BA-1288/U  1.3V flat contact mercury cell 1.20"dia 0.65" high
BA-1318/U  5.2V flat contact mercury bat 0.64" dia 1.045" high

Try S&G Electronic in Philadelphia. 215/474-7663.  They also have a web
site that's been posted here and/or on Milsurplus.

>    Does anyone have any military battery info for BA-1318/u and =

BA-1288/u? What the voltages are for these or where I can get some? I =

need them for a IM-108 Radiacmeter.
<

73,
Robert Downs
<RWDowns_WA5CAB@compuserve.com>
Houston

------------------------------
Message-ID: <39DC73D1.E62D8237@bw.webex.net>
Date: Thu, 05 Oct 2000 08:28:01 -0400
From: Al Klase <skywaves@bw.webex.net>
MIME-Version: 1.0
To: Old Tube Radios <boatanchors@theporch.com>
CC: Old Tube Radios <boatanchors@theporch.com>
Subject: Re: Replacement transistor in CU-5069 multicoupler
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

Jim, Don, and the Group,

	I respectfully wish to differ with Jim's suggestion.  The
2N5160 is a PNP 5-Watt RF power transistor with a
transistion frequency (F sub T) of 500Mhz minimum. 
Replacing it with a low frequency device will almost surely
degrade the LINEARITY of the system resulting in (possibly
subtle)intermodulation problems.  What to do?

	Use the Google search engine http://www.google.com/ to
search on 2N5160 .  This silly thing appears to search the
text of the ENTIRE WEB, and will find parts in individual
inventory lists. Saw one source offering them for less than
$2.00.

Best regards,
Al  

-- 
Al Klase - N3FRQ
skywaves@bw.webex.net
Flemington, NJ 08822
Web Page:  http://www.webex.net/~skywaves/home.htm

------------------------------
From: "Ed Sieb" <sieb@sympatico.ca>
To: Old Tube Radios <boatanchors@theporch.com>
Subject: RE: Six Metres, anyone?
Date: Thu, 5 Oct 2000 08:45:49 -0400
Message-ID: <LOBBJHOLOOHLIPLONIAFEENDDDAA.sieb@sympatico.ca>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

Hi Brien,

I've picked up a few 6M AM rigs, like the Lafayette HA-460, and a Polycomm
6.
The band opens up very few days, (sometimes every day,) for a few hours,
and
sometimes almost all day, depending on MUF.

The main AM calling freq is 50.4 and 50.125 for SSB.  Activity is somewhat
"modest" here in Canada, but the the ops are very enthusiastic. There is a
very
eager gang here in Ottawa who monitor the band all the time, (SSB 50.125,
etc.)
There are always guys listening on 50.4 AM.

Yes, grab one of those rigs, get it on the air and have fun.  BTW, with
atransverter, and
an IF rig that runs FM, you can work the several FM repeaters in the
Toronto area.

Some days, the MUF is high enough, and conditions good enough to work well
into Europe and UK.  Great band; love it.

73
Ed
VA3ES

> -----Original Message-----
> From:  Brien Pepperdine
> Sent: Wednesday, September 20, 2000 12:11 PM
>
>
> Anyone one here familiar with or doing any operation on Six Metres?
>

------------------------------
From: "Ed Sieb" <sieb@sympatico.ca>
To: Old Tube Radios <boatanchors@theporch.com>
Subject: RE: Shure Hand Mic
Date: Thu, 5 Oct 2000 09:29:31 -0400
Message-ID: <LOBBJHOLOOHLIPLONIAFMENDDDAA.sieb@sympatico.ca>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

The Shure 404 is a hand-held version of a 444. Basically, it's Hi-Z. 
If the TR-3 accepts Hi-Z mics, then this would be an excellent choice.

73
Ed
VA3ES


> -----Original Message-----
> From: David Jordan
> Sent: Tuesday, September 26, 2000 9:17 AM
>
> I've got a Shure 404C handmike...
> Would like to know what the impedance of the mic
> is...wondering if it will work with my TR3?
> 

------------------------------
Message-ID: <004401c02ed4$e698ec60$e958143f@default>
From: "w2tu" <w2tu@email.msn.com>
To: Old Tube Radios <boatanchors@theporch.com>
Subject: TR4 fs
Date: Thu, 5 Oct 2000 10:02:05 -0400

Gentlemen:

    Still have the Drake TR4 for sale. It is in nice, clean shape and does
work. Used it at the Shipboard stn. this summer. (USS THE SULLIVANS). Has
MS4 speaker-ps, swan mike,extra set of finals (used) and full manual (copy).
    Looking for $300 + shipping or Best offer+.

Tnx

Paul B. W2TU



------------------------------
Message-Id: <4.2.0.58.20001005074546.00bbbc80@pop3.eimac.cpii.com>
Date: Thu, 05 Oct 2000 07:57:14 -0700
To: Old Tube Radios <boatanchors@theporch.com>
From: Paul Thekan <Paul.Thekan@eimac.cpii.com>
Subject: Forest Service Radio Type KU-R
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; format=flowed

Hello to the group


  I have this receiver , and would like to know a little bit more about it. 
It is about 6 inches square and has a NC tuning dial  and  a volume , 
squelch , power on/off switch and a spot freq.? manual tune switch located 
on it's small front panel .The back of the radio has a plug for external 
power and control . The control I guess was to the matching xmtr??? The 
front panel has etched into it : U.S. Dept of Agriculture , Forest  Service 
Type KU-R model A receiver , made by Oregon Electronics in Portland.
  Any info appreciated.

Thank you

Paul

N6FEG

------------------------------
Message-ID: <00a201c02ee4$b813cb20$378abd18@n4fs>
From: "Mike Feher" <n4fs@monmouth.com>
To: Old Tube Radios <boatanchors@theporch.com>
Cc: <boatanchors@theporch.com>
Subject: Re: Replacement transistor in CU-5069 multicoupler
Date: Thu, 5 Oct 2000 11:55:40 -0400
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit

I was just going to make a post respectfully disagreeing with Jim's
assessment of the 2N5160 when I saw that Al Klase had already done so. I
recognized the number and knew that I used many of them in my youth. They
were the PNP equivalents for the 2N3866 and the 2N5109 and if any of you
built any RF stuff 20 or more years ago with SS devices you would certainly
recognize those numbers. In either case I support Al's comments. 73 - Mike



Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ, 07731
(732) 901-9193


----- Original Message -----
From: "James C. Garland" <4cx250b@miavx1.acs.muohio.edu>
To: "Old Tube Radios" <boatanchors@theporch.com>
Cc: <boatanchors@theporch.com>
Sent: Thursday, October 05, 2000 7:08 AM
Subject: Re: Replacement transistor in CU-5069 multicoupler


> Hi Don,
> I've also had the 2N5160 go dead in my CU-5069. Turns out the 2N5160 is a
> general purpose PNP low gain device, with thousands of adequate
> substitutions. I believe I replaced mine with a 2N2905 (might have been a
> 2N2907) from my junkbox, but any general purpose PNP transistor in the
same
> package (TO-5) should work. The amplifier stage is such low gain that the
> frequency response of the transistor isn't really important (as I recall
> the 2N5160 is rated mostly for audio work). Be sure you put heat sink
> compound on the case and use the supplied heatsink.
>
> Speaking of heat, it's also not a bad idea to reduce the heat dissipation
> of the CU-5069. I run mine off of 110V and set the internal voltage down
to
> about 24 Volts. The unit runs hot because all those transistors are biased
> for linear service. Some people cool the units with a muffin fan, but I've
> not bothered. Mine runs 24 hours/day.
>
> 73,
>
> Jim Garland W8ZR
>
>
>
>
> >Back to the RCA CU-5069 m/c unit - some time ago I found one of my units
> >had gone very dead - the 2N5160 in the hi level driver stage was gone.
> >This transistor doean't appear in any cross refs I have, or any of the
> >parts houses either, and internet searchs haven't been too helpful
either.
> >Any ideas for a source or a good bet for a sub?
> >
> >
> >73 Don
> >VE6JY
> >
> >VE6JY  Don Moman               email: ve6jy@freenet.edmonton.ab.ca
> >Box 127 Lamont, Alberta        email forwarding: ve6jy@rac.ca
> >CANADA  T0B 2R0
>
>
>
> ******************************************************************
> W8ZR Amateur Radio Website: http://www.muohio.edu/~4cx250b/web/
> ******************************************************************
>
>

------------------------------
Message-Id: <200010051615.e95GF1X23109@jackatak.theporch.com>
From: listown@jackatak.theporch.com (Mail List Owner)
To: Old Tube Radios <boatanchors@theporch.com>
Subject: ADMINISTRIVIA: Using The Archives
Date: Thu, 5 Oct 2000 11:15:01 CDT

Gang-

          !!!THIS INFORMATION HAS CHANGED!!!!

       !!!SAVE THIS FILE FOR FUTURE REFERENCE!!!!!

This periodic post is designed to help everyone gain more value from
their boatanchors subscription.

Often I receive an email request, or I read on the list, of someone
who is aware there is an archive available with some special files
with special information that is of a more permenant nature than a
post to the list, but who is unaware of how to retrieve these gems.

In the archives, there are cross-reference tables for Tubes, Military
Equipment Nomenclature, suggestions for restorations and modifications
to our beloved fire bottle rigs, and some wonderful stories of real
adventures and the people involved.

These files may be accessed by the Web... quickly and easily.
These files can also be accessed by email.

For WWW access:
     go to http://www.theporch.com
     select "Mailing List Web Interface"
     on your first time there, click "Register For Full Account"
     follow the instructions, and BE SURE you use the email address
        that you have your BoatAnchors mail addressed to -- this interface
        will work ONLY for members of the list!
     Once registered, you can:
        search the archives of previous posts (so far we haven't loaded
           all the previous posts online, but that is in the works;
        download the index of files;
        retrieve individual files
        manage your subscription via the web interface
AWESOME!

For email access:
Step One:
   send an email (leave the subject blank, or, if your mailer
        requires a subject, type a single character, like "a" in
        the subject box) to:
listproc@sco.theporch.com

Step Two:
   in the body type:
index boatanchors

NOTE: The index *includes* all the previous articles now available
      through the web interface, so the index is HUGE and difficult
      to search -- the web interface is much easier.

Step Three:
   after checking out the index for files of interest, and finding
        the one or more you want to have sent to you, send another
        email to:
listproc@sco.theporch.com

   and, in the body, type:
get boatanchors file.name

        where you substitute the name of the file from the index
        for "file.name"

This should get you off to a good start. If you encounter any problems,
please let me know at the address below.
--
73
Jack, W4KH/Mobile - - - Mailing List Archiver/Owner - - -
listown@jackatak.theporch.com - "Plus ca change, plus c'est la meme chose"
     "Il n'y a que les idiots qui ne changent jamais d'idee"
Thu Oct 5 11:15:01 CDT 2000

------------------------------
Message-Id: <v03007806b602533be9ba@[132.235.46.157]>
Mime-Version: 1.0
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Date: Thu, 5 Oct 2000 12:32:17 -0400
To: Old Tube Radios <boatanchors@theporch.com>
From: Richard Post <post@ouvaxa.cats.ohiou.edu>
Subject: Eico mpx adapter
Cc: russ dworakowski <wb3fau@hotmail.com>

Russ,


Believe that to be the Eico MX99.  Schematic source below.  


<<http://www.engr.uark.edu/~lar/mx99pg1.gif>


<<http://www.engr.uark.edu/~lar/mx99pg2.gif>


I believe it matches the ST-40 and your tuner.  I have the combo. 
There is no good reason why just about any tube mono FM tuner or
receiver cannot be adapted to feed one of these.  As I recall from
foggy (old fogy?) memory, you can tap the audio feed from the
discriminator or ratio detector just before the deemphasis circuit.  


This list is for tube stuff, not just ham stuff.  May have to
temporarily tap into my SX-42 and see how well it handles stereo  :-)  
 With some fresh caps and a deoxit of the bandswitch, loctal tube
contacts, etc, it handles FM quite well.  Should be able to handle at
least the more powerful stereo stations. 


73,

Rich

<fontfamily><param>Geneva</param>

<<http://oak.cats.ohiou.edu/~postr/bapix/>   </fontfamily>



my Eico

>HFT-90 tuner and how surprisingly well it still

>works for 1960 vintage.  It is mono, and I have

>never seen a multiplex adapter for it.  

>a tubed item].  Does anybody have one of these or info?



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Message-Id: <4.3.2.7.2.20001005132042.00ca4400@sdct-sunsrv1.ncsl.nist.gov>
Date: Thu, 05 Oct 2000 13:27:21 -0400
To: Old Tube Radios <boatanchors@theporch.com>
From: Roy Morgan <roy.morgan@nist.gov>
Subject: WTB Tek 543 Manual, for Museum.
Cc: Brian Belanger <bcbelanger@aol.com>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; format=flowed

Boatanchorites,

Wanted, for The Radio History Society museum workshop:
Manual for their Tektronix 543 Oscilloscope.  (Have scope, need manual!)

Tax deductible donations accepted (for all or part of fair value of manual.)

For info on the museum, see;
http://www.radiohistory.org/

Reply direct, or to Brian Belanger <bcbelanger@aol.com>

Thanks for your help!
Roy
-Keep em glowing!
Roy Morgan, K1LKY since 1959
7130 Panorama Drive
Derwood MD 20855
301-330-8828
roy.morgan@nist.gov

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Date: Thu, 5 Oct 2000 13:56:52 -0400 (EDT)
From: John Poulton <jp@cs.unc.edu>
To: Old Tube Radios <boatanchors@theporch.com>
Subject: Wrapping Power Tubes??wq
Message-ID: <Pine.GHP.4.10.10010051337240.25871-100000@mira.cs.unc.edu>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

Do any of you ladies/gents know what the heck that stuff
is that was used to wrap and protect larger tubes back in
the good old days?  This material has a brown paper backing
and a substantial thickness of brown spongy paper-like material 
attached to it.  It's just what you need to absorb the brutal
jolts the USPS applies to those delicate firebottles inside 
a package.

This isn't a completely idle question:  I've got to ship some
big tubes (they'll be on the way soon, Don!), and I'd really
like to find a source for this stuff, whatever it is.

Any ideas??

Thanks much!
John Poutlon KF4OZY

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End of BOATANCHORS Digest 3001
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