[Heathkit] Marauder - technical question

[sbjohnston at aol.com]

That is an odd choice, isn't it?  I've had a couple other rigs that did 
not cut off the finals when in stand-by, and they made heavy white 
noise in the associated receiver!  Maybe with different tubes they 
wouldn't make noise?   I modified them to to change the bias to beyond 
cut-off when the rig was not transmitting...

Steve WD8DAS

sbjohnston at aol.com
http://www.wd8das.net/
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-----Original Message-----
From: Paul Baldock <pbaldock at verizon.net>
To: heathkit <heathkit at mailman.qth.net>
Sent: Fri, Jul 16, 2010 10:38 pm
Subject: Re: [Heathkit] Marauder - technical question



I'm in the process of bring a Marauder back to life.

I have a question:

When in SSB PTT/VOX, but not transmitting, the PA is biased to draw
50mA. Why is it not biased off, and then to 50mA when in transmit?
This how it works in CW and would be a simple mod to make it do it
this way in SSB. It seems the designer must have had reason.

Any ideas?

- Paul  KW7Y
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