Hi Windsor
Your Email address no longer works. I hope you have sent the tek 475
fan. Let me know.
Richard
--- In TekScopes@y..., mongteen@e... wrote:
Hello,
I have a RM31a that has a 54x CRT that works reasonably well.
Thanks
Dean :) There is a slight horz. jitter about 2mm worth. So I check
the left deflection pin and see that there was no jitter. I check
the
right deflection pin and see jitter. So I go about measuring and
changing tubes associated with the right deflection pin. Then I
sleep on it for a while. It occured to me to check for jitter at
very
low sweep speeds. I connect my 7704a to the right deflection pin
set
the coupling to AC and volia I found that the jitter is 120 Hertz.
So
I measured the 500 V supply and found ripple of about 1 volt PP. So
I
added a small cap to help filter out the ripple and the jitter is
gone!
The moral of the story is that alway check the PS first! I fell in
to
the trap of seeing that everything else worked OK and assumed the PS
was OK.
Windsor
