[Boatanchors] T-827D?

[eugene at hertzmail.com]

Hello all,

I've been working on my URT-23 (harris rf-110A) set up. Last I wrote, I
had asked about the bias settings. Well, it seems I have been successful
in getting the bias set properly according to the manual, so that is
good! All operating parameters seem to be within range, except for the
driver plate voltage. It should be 450V-600V and its up around 700V. I
will have to look into this. I wonder what the effect is of having a
plate voltage 15% above recommended? 

I finally powered the whole unit up and tried to generate an amplified
signal but no dice using the T-827D exciter. So I tried to use my HP
8657A RF generator to substitute for the T-827D and lo and behold! At
around +15dbm input from the generator I got a whopping 500W output from
the amplifier! Wow! 42db of power gain!  I haven't tried any more than
that, but now I know some work still remains to be done on the T-827D.  

My manual is for the T-827B and T-827E but not the D. There are some
noticeable differences. Anyone have a navships manual to the D model?

For anyone familiar with these, I do have a question.  I am wondering if
my 5Mc oscillator might be set in the wrong position. The manual
indicates three positions. COMP, INTERNAL, EXTERNAL. Since I am not
using an external 5mc source, I would imagine I should be in the
"INTERNAL" position. However, on my unit, the three positions are
INT/COMP, EXT (NORMAL), EXT (OVEN STDBY). Mine is set on EXT(NORMAL). I
was just thinking that with no RF output on the T-827D, perhaps this
oscillator was oscillating and that could be causing my problem.

Anyone have a guess which is the position I should be using? Any
thoughts?

Thanks!
Eugene