Heathkit SB104 , 1975


Day1, unpacked and cleaned.









Only really needed if card G needs to be aligned, some cards Oscillate madly extended, read the manual and warnings.

there next are all cards in my rig and some on the 104A.







I put some hot glue on the bottom right inductor to keep it solid and safer.


not used on the non "A" 104




here is what I do to clean up the 14vdc power line. It really needs a CM/DM LCR filter, but this works in most cases. C12 is missing on first 104s. was added with service bulletin. Any inductor filters added need to work at 20 amps. here. I'm putting in TVS now... not finished...

Page 1 of 2