[Drake] T-4XB--no output

[Paul Ellis]

Hi, all--

Thanks again to all who helped me troubleshoot my R-4B a few weeks 
back.  Once I got that buttoned together, I started turning my attention to 
my T-4XB, which isn't working right.   The problem is that there's no 
output from the transmitter on the wattmeter.

I first suspected a bad driver tube and/or finals, so all three tubes had 
known good tubes substituted.  Voltages check out from both the power 
supply (bias is correctly set at -62V) and the filament fuse is just fine. 
Voltages seem to check out at each of the pins of  V4, V5 and V6, too.

With the R-4, I can detect a very low level of drive out. Adjusting the 
plate, preselector and load and drive does make a difference--I can hear a 
weak signal on the receiver, complete with audio, etc., and it's peakable 
using the transmitter controls.  I'm suspicious of components near and 
around the driver circuit, but need more ideas on where to look and what to 
look for.

As always, I appreciate all the thoughtful responses I get from all of 
you.  Thanks in advance!

73,
Paul
KA0JQF