{Collins} KWS-1 Output Problem

[Vince Vielhaber <vev@xxxxxxxxxxx>]

Back around '77 I bought my Golddust Twins w/ accessories from the 
original owner.  Included were the original 4X150 finals.  He did all 
the updates to both the transmitter and receiver as they came out.

Sometime after I got it the 4X250s went out and when I replaced them 
with 2 new 4CX250Bs I had problems getting any output - even after 
alignment.  So I put the 4X150s in and it had worked fine.  I figured 
there was either something wrong with the tubes or CX weren't compatible.

The 4X150s worked fine for a number of years.  At some point, I my 
antenna came down (long story, babysitter, kite, ...) and I never got it 
back on the air.

Fast forward to now.  25-30 years went by and I didn't run the 
transmitter and only sparsely used the receiver.  Needless to say many 
caps had dried out in both.

Got the receiver working good now but the transmitter is giving me some 
grief.

After the power supply rebuild I have the all the supply voltages 
working right, loaded it up (with the 4X150s) and got around 700 watts 
on 80 meters  (CW).

Not wanting to keep the 150s in there, I put a fresh set of NOS 4CX250Bs 
in it.  At the time I had forgotten why the 150s were in it until after 
I went thru the alignment. I used the W8MAQ neutralizing method and when 
I was done with the alignment I loaded it up on 15 meters.

Loaded up nicely to 500ma, I looked at the wattmeter and it says 40 
watts.  Huh?   Tried a different wattmeter, also 40 watts.   Tuned up on 
80 meters, once again 500ma and once again 40 watts out (CW).

Supply voltages are good except the TUNE voltage is low.

I looked at the output of the transmitter on a spectrum analyzer and all 
it shows is the one signal.

I bypassed the TR relay, no difference.  Yes, I'm using a dummy load.

What am I missing?

Thanks!
Vince.
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