[Hallicrafters] FW: 22 Pin Card Extender

[Hunter Ellington]

R. Hunter Ellington, Esq.
Shareholder

Gorrell  Giles PC
1331 Seventeenth Street, Suite 1000
Denver, Colorado 80202
(303) 996-6585 Direct
(303) 996-2680 Fax
hunter.ellington at gorrellgiles.com
<mailto:hunter.ellington at gorrellgiles.com> 

 

________________________________

From: Hunter Ellington 
Sent: Friday, February 23, 2007 9:09 PM
To: hallicrafters at mailman.qth.net
Subject: FW: 22 Pin Card Extender


One and all,
 
Below is a dire request for a 22 point edge-contact extender board.  Tom
is trying to restore an FPM-300 I bought on eBait.  Does anyone have the
extender board or the IC mentioned below?  Hope springs eternal.  73  
 

R. Hunter Ellington, Esq.
Shareholder

Gorrell  Giles PC
1331 Seventeenth Street, Suite 1000
Denver, Colorado 80202
(303) 996-6585 Direct
(303) 996-2680 Fax
hunter.ellington at gorrellgiles.com
<mailto:hunter.ellington at gorrellgiles.com> 

 

________________________________

From: TC Dailey [mailto:daileyservices at qwest.net] 
Sent: Friday, February 23, 2007 9:01 PM
To: Hunter Ellington; Gregory Cook
Subject: 22 Pin Card Extender


The piece i'm speaking of, is to extend a PC board out to where you can
actually work on it.  It amounts to a 22 point edge-contact board, with
a 22 point edge-contact socket.  These boards were common in earlier
electronics, but you don't see 'em much anymore.
 
The sockets are still around, I think.  Worst case, we'd make one from a
22-point blank card, and just glue the socket onto it, then connect the
points with wire.
 
---
 
It's for that damned FPM-300.  I'm pretty sure that the audio input FET
speech-amp transistor is gone, but hopefully NOT the type 370 round-case
type IC... Sylvania (NTE) book shows it as "obsolete - unavailable"
 
The thing puts out about 50+ watts on "tune" position, but after that,
it's all dreaming.  Turns out that the microphone audio is what DRIVES
the balanced-modulator to produce the basis for mixed-source RF to the
driver.  The absence of a CW carrier is also indicative of this, as the
tone oscillator (to let you hear your own sending) is inputted to
unbalance the modulator, and THAT is what produces your CW signal...
thus - no audio section / no RF output.