[R-390] Latest update on the EAC R-390A

[Jim Green]

As I stated before, I think I cooked my crystal calibrator crystal  
plug-in unit whilst following the alignment procedures laid down in  
the Y2K R-390A manual. The instructions said to inject a signal into  
E210. and zero beat the signal by rocking the sig gen in. I was unable  
to hear any signal to zero beat and afterwords my Crystal calibrator  
wandered and sounded garbled.

I switched out the plug-in crystal unit and the problem was solved.

Thinking I may have done something wrong in the procedure, I carefully  
read the procedure and repeated the procedure. I still could hear no  
signal to zero beat to. I didn't increase the sig gen gain this time  
and discontinued the procedure.

After this my crystal calibrator seems to work, but I get a chirp as I  
switch to CAL. I hear this chirp with the BFO in either on or off  
position.

I pulled the RF deck and replaced all 3 paper caps with orange drops.  
I tested the the caps I removed and they were not leaky. Everything  
under the RF deck looks just like new. No burnt parts or any other  
signs of damage. I tested all the tubes on the RF deck with my Hickok  
533 tube tester and all the tubes test OK (one of the 5814's is a  
little weak, but no shorts).

I'm a little reluctant to re-install the RF deck right away. I would  
hate to have to pull it again & I really haven't fixed anything so I  
probably would have to do so.

Does any of this sound familiar?

Anything else I should do while the RF deck is out?

73

Jim