05-31-2013, 06:40 PM
Ok, I rechecked the voltages with all tubes in chassis. Heres what I have.( 6A7 P to K =332v,SG to K=66v, K to Gnd = 1.8v,G2 to K=272v, G1 to K =16.67)
(42 tube P to K =423v , SG to K = 14.16v ???)
(75, P to K =201v) (78 1st IF, P to K =329v) (78 2nd IF, P to K =103.9v ??) I did change the variac to 115v before this test.
I had radio on for about half an hour while testing and the 42 tube did not start glowing blue. All filiments lit and tested at 6.5v and the 80 at 5.3v. I did try the grid touch test of the 75 and now I don't get any static as I did previously. I still need to retest tubes and plan to this eve. But I wanted to get these volt readings posted they seem too high. Any other advice on things to check greatly appreciated. Mike Sorry the 80 tube is 369v to gnd.each side and 738v v P to P.
(42 tube P to K =423v , SG to K = 14.16v ???)
(75, P to K =201v) (78 1st IF, P to K =329v) (78 2nd IF, P to K =103.9v ??) I did change the variac to 115v before this test.
I had radio on for about half an hour while testing and the 42 tube did not start glowing blue. All filiments lit and tested at 6.5v and the 80 at 5.3v. I did try the grid touch test of the 75 and now I don't get any static as I did previously. I still need to retest tubes and plan to this eve. But I wanted to get these volt readings posted they seem too high. Any other advice on things to check greatly appreciated. Mike Sorry the 80 tube is 369v to gnd.each side and 738v v P to P.
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