Quote:
Originally Posted by Electronic M
Once the tubes are confirmed good, caps are changed, and all relevant adjustments have been tried my default is to check every resistor in the circuitry that is potentially related to the symptoms...In sets I really care about I may even go through the resistors in some sections before first power up.
Some sets will have most resistors out of tolerance while others will have almost none. I'm restoring a Sylvania in the rectangular tube section that seems to have nearly ALL resistors in any given section I go over in detail out side their specified tolerance.  |
I think it's a descriptor of the environment the set was in. Those carbon ones deteriorate pretty quickly given the right conditions.
A couple borderline ones but they're still pretty close to within 10%... but I'll replace them anyway.
Will have to see what I do about the one in the yoke though... accessing it to check it is gonna be a PITA. Wouldn't be surprised if it was the culprit either since it's an asymmetric foldover - left side has it but not the right (and the poweroff dot is now centered)...
One of these days I'll have to try locating a tube tester. Haven't seen anything good locally that isn't exorbitantly priced though.