[Hammarlund] PTT for the HX-50

[Dennis Petrich]

They my call it the dirty fifty but my HX-50A is solid as a rock....

When I was bringing my 50A I had a nagging problem in the VOX circuit.
After it was warmed up the VOX release would hold on very long.  Cold it
would work OK.  It turned out to be a very gassy tube.  When I checked it
later the tube tested gassy as confirmation....

Ciao, Dennis, k0eoo

-----Original Message-----
From: hammarlund-bounces at mailman.qth.net
[mailto:hammarlund-bounces at mailman.qth.net]On Behalf Of Robert Nickels
Sent: Sunday, March 05, 2006 12:51 PM
To: Duane Fischer, W8DBF
Cc: hammarlund at mailman.qth.net
Subject: Re: [Hammarlund] PTT for the HX-50


Duane, they may call it the Drifty 50 but just for the archives, I 
should report that the VOX circuit isn't as nifty as I thought 
yesterday.  Al's schematic is marked "Production Run 2" which evidently 
includes some changes in the VOX relay circuit as my HX-50 s/n 518 is 
wired differently.  My previous comments about wiring a PTT switch to 
terminal 2 on the rear panel is correct in both cases, but the version I 
have requires two separate wires to the switch, which precludes the use 
of a standard 3 wire mic plug.  Also there is 120 volts DC on the PTT 
circuit, not what I want to hold in my hand - so my advice to anyone 
playing with an HX-50 is to be aware of these differences to avoid a 
shock hazard.

73 Bob W9RAN

_______________________________________________
List Administrator: Duane Fischer W8DBF
** For Assistance: dfischer at usol.com **
----
http://mailman.qth.net/mailman/listinfo/hammarlund