02-27-2015, 09:25 AM
Good morning everyone. After a brief hiatus, I've gotten back inside my "new" tube tester. After doing a little testing with my DMM, I decided to replace all the resistors in the unit. What made it a little difficult is the schematic for the precision resistors show values, but not wattage. They are all open air units consisting of resistor wire wrapped around pieces of phenolic board. I ordered 5 watt, 1 percent wirewounds from Mouser. I hope they will suffice. The unit has one Aerovox 0.1 MFD 400 WVDC capacitor in it. I'm replacing that with a 0.1 MFD 630V mylar film cap. The unit also has a copper oxide half-wave rectifier, which tested open when I put my meter to it. I'm going to replace that with a 1N4007 diode. I've always said that I know just enough about electronics to be dangerous, so I'm calling on my Phorum Phriends for input again. Do you think these replacement parts are correct for the unit, or am I missing something? Any and all input is appreciated. Take care, Gary
"Don't pity the dead, pity the living, above all, those living without love."
Professor Albus Dumbledore
Gary - Westland Michigan