[ARC5] Fw: Model 19 MKll

[Henry Mei'l's]

Hi Meyer and everyone else
I used the method of running the a keying (T/R) relay in series with the 
1625 cathodes of my ARC-5 xmtrs back in the 50's. It does gives you cathode 
bias-but you do lose some power because of the voltage drop, depending on 
the relay coil resistance- I suppose you could have a pair of contacts that 
short out the relay coil when it kicks in- wonder what that would do to the 
signal (a kind of burp?).

Of course, with the oscillator running, you wont be able to work QSK and you 
probably will have a readable backwave -- I do when keying the cathodes of 
my TCS final, with oscillator and multiplier stage unkeyed -- same with the 
ARC-5's  I keyed that way.
You all are probably  aware of all this-- so call it nostalgia.

73s, Henry

----- Original Message ----- 
From: "Meyer Gottesman" <wrecktech at yahoo.com>
To: "Discussion of AN/ARC-5 military radio equipment." 
<arc5 at mailman.qth.net>
Sent: Tuesday, February 23, 2010 12:52 AM
Subject: Re: [ARC5] Fw: Model 19 MKll


I stripped the usesless UHF out of my WS 19 also. The 80 and 40 CW 
performance is FB. As said before, the only nasty element is the CW keying 
being at +275 volts. The R/T relay can become the 807 cathode resistor. If 
the VFO runs all the time when transmitting and ONLY the 807 cathode is 
keyed, there should be little or no chirp and I do not recall the drift 
being too bad.

73,

Meyer Gottesman, W6GIV
Macon, GA



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