09-03-2016, 09:31 AM
Thanks for the tips. I was able to work on it last night for a little while.
Arran, the plates on the 80 never got to a glowing stage but I'll keep that in mind at the next power up.
Bob, thanks for the links to Ron's repair tips. I had seen the modification for the gimmick and the 2meg resistor change. I was going to wait on those until all other work was done. I missed the tip on resistors 9 and 11. That was timely advise. I'm currently in that section and was going to replace #11 the 16k and then noticed the wattage. Back when I first repaired this (22 years ago) I replaced that resistor with a 1 watt carbon composition, rookie mistake. Ron's recommendation was a three watt. I didn't have a three watt so I made a replica dogbone with 3 resistors in parallel. I have a 33k and two 56k 1 watt flameproof resistors inside a tube filled with epoxy. Is my theory correct that 3; 1 watt resistors can handle the same power as a single 3 watt? Actual resistance measurement was within 1% of rating called for. I still need to paint it though. I also missed there fact that cap block #10 was shown twice on the schematic, now it all makes sense. I don't know how many times I tried to trace this out and still missed that.
Arran, the plates on the 80 never got to a glowing stage but I'll keep that in mind at the next power up.
Bob, thanks for the links to Ron's repair tips. I had seen the modification for the gimmick and the 2meg resistor change. I was going to wait on those until all other work was done. I missed the tip on resistors 9 and 11. That was timely advise. I'm currently in that section and was going to replace #11 the 16k and then noticed the wattage. Back when I first repaired this (22 years ago) I replaced that resistor with a 1 watt carbon composition, rookie mistake. Ron's recommendation was a three watt. I didn't have a three watt so I made a replica dogbone with 3 resistors in parallel. I have a 33k and two 56k 1 watt flameproof resistors inside a tube filled with epoxy. Is my theory correct that 3; 1 watt resistors can handle the same power as a single 3 watt? Actual resistance measurement was within 1% of rating called for. I still need to paint it though. I also missed there fact that cap block #10 was shown twice on the schematic, now it all makes sense. I don't know how many times I tried to trace this out and still missed that.
