4 Jun
2023
4 Jun
'23
1:08 p.m.
I've added some things to the For Sale Sheet.
Bill, the H88 on your sheet entry. Can you check the CRT to see if the neck is open? Or clean the CRT face? From the photo, it's hard to tell the issue. I don't recommend powering up the H88. The tantalum caps on the +12 /+18V line tend to short out and burn up traces. It's because 120V AC line voltage raises the 18 volts to more like 21V which exceeds the 20V rating of the caps. That, and age. The H88/89/19 expects 110VAC. Regards Herb -- Herbert R. Johnson, New Jersey USA https://www.retrotechnology.com OR .net preserve, recover, restore 1970's computing email: hjohnson AT retrotechnology DOT com or try later herbjohnson AT comcast DOT net