[AMRadio] TS430 as VFO on a KNIGHT T60

KA5MIR ars.ka5mir at gmail.com
Sun Oct 15 14:34:49 EDT 2006

Hello Jack,
  Controlled carrier has tradeoffs.  You are trading reduced linearity and 
tricker audio adjustment for greater PEP.  Not that it can't be done and 
sound reasonably good.

  Another point is that tubes with zirconium or titanium on the plate NEED to 
get red to getter properly.  I'd be more concerned about the power supply 
than the red plates.  But that's just SSB amps in general.  I don't have any 
experience with the SB200.

  It would probably be easier and more productive to just reduce the carrier 
power on the 430 until you're happy with the amp.  I doubt anyone on the 
other end would notice 20 or 50 watts difference and your audio would 
probably sound cleaner too.

  But the main thing is to have fun and enjoy your radios.  If you want to 
put the T60 on the air, by all means drive it with a little carrier from the 
430 until you get your crystals.  You won't have to worry about being on 
frequency.  :)


On Sunday 15 October 2006 11:42, Jack Schmidling wrote:
> My thoughts on an advantage of the T60 is that, as it has
> controlled/suppressed carrier, the idle power is a lot less than the
> TS430.  As a consequence, I could drive a linear (SB200) a bit harder
> and get more power out of it than when using the 430.
> When running the 430 at about 15 watts, and a plate current of 150 ma on
> the amp, the plates get redder than I like.  Seems like I should be able
> to increase the input significantly with the T60 before the plates got
> to the same temp.
> Is this correct reasoning?
> I think I will just get some xtals for the T60 as I am getting a Ranger
> soon.
> js

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