Quote:
Originally Posted by Penthode
Before you give up on this 8601a, could you run through a few checks? A blown fuse suggests perhaps a power supply failure.
The 1/8A fuse looks like it was for theb-75 volt supply. You should check to ensure it is -75v and while you are at it the +20v supply.
The good thing is that after you changed the fuse, you got a 12.5Mhz sine wave. The suggests the hybrid output amplifier is good and the internal fault may be minor.
Here is the link to the BAMA stiched schematics. The Power Supply is fig_8_26
https://bama.edebris.com/manuals/hp/8601a/ |
The -70 and +20 volt voltages are fine. It's the -6.3 volt line that's suspect. Reading only -3.7V