[Phil]

Hello to all. I am trying to bring back to life a Heathkit GR-25. After replacing the CRT, which had black spots around the edge of the screen and wasn't in the best of shape with a 25ajp22 both of the thermistors in the power supply burned up. I can't see how this is related to the CRT replacement, but at any rate I have to find replacements. The schematic lists one of them as 120 ohms cold and either 1.5 or 4 ohms hot depending on which schematic you believe. It probably doesn't make any real difference. The one in series with the degaussing coil doesn't have any information at all and the parts list only gives Heath's part numbers and no specs. Was this set based on a Zenith or RCA design? I find several made or packaged by Workman on eBay, but they don't give any information except various manufacturers part numbers they were designed to replace. Does anyone know which FRT number is correct for this set?