I replaced the 6KV caps with the white ASC brand tubulars from Allied. I didn't use ceramics. I've checked and or replaced all the resistors on the HV board. I replaced the selenium rectifier with a 1 amp, 1000PIV diode. All electrolytics have been replaced. I have a copy of the schematic that I blieve is from Riders TV vol II. It shows B+ at 440V, I measure 392V at the main line. I've tried two different 25Z6's with the same voltage. Yesterday I changed the channel and horizontal deflection went to half the screen size! I finally located the problem in the hor. oscillator tube. Sometimes these things make you want to pull your hair out! Thanks again for any info! Al