[Milsurplus] The TCS question

[Kenneth G. Gordon]

> I have been building up a new AC supply for my TCS transmitter, and  I know the
> B+ feed to the oscillator and doubler stages will be +250 like in the original
> installation but what I was thinking of playing around with the HV feed to the
> PA and modulator tubes. originally they were feed +400, was wondering what would
> happen if I use a higher plate voltage, maybe 450 or 500 volts with the idea of
> a couple watts more, or if I can make the second RF tube active in the voice
> mode?

Why? For about 1/2 "S" unit? Not worth either the effort or the danger to the 
components.

> with a little more plate voltage on the modulator for increased
> modulation. the real fear is that too much voltage on the plates will blow the
> modulation transformer, although looking at this transformer it looks just about
> as heavy as one in a ART-13 and they run at 100 watts with no issues. as a end
> result would like to get about twenty to twenty five watts of AM phone on a
> stock TCS transmitter. Has anyone else in the group worked with this? anyone
> have any ideas on what the modulation transformer is capable of? always
> remember, AME Ray Fantini KA3EKH

I would not do any of this. As others have mentioned, a TCS is a nice rig and 
they are getting harder to get. Please leave it alone.

BTW, I have worked 35 countries on 40 meters with a stock AN/GRC-109, 
crystal control and an end-fed "long-wire". The power output of the 
transmitter is AT MOST, 15 watts. Most of the time it is about 10 watts. I have 
no trouble working anyone I can hear.

1/2 "S" unit would never have made any difference at all.

Ken Gordon W7EKB