Hi All,
I have a 652a (s.n. 826-01432) that has output level problems but
only at a very specific range of frequencies. On the x10 range from
~40Hz to ~75Hz, the output level seems to be modulated by another
signal. I thought it may have to do with ripple on one of the
supplies but everything looks clean. The level between 40Hz and 75Hz
will swing virtually full scale on the meter at some frequencies but
is relatively stable at 60Hz. On all of the other ranges, it's fine.
I've downloaded a manual from BAMA but it's for the newer model and
the boards are different. If someone has seen this problem and can
point me in the right direction or knows where I can get an older
service manual, I'd appreciate the help.
Thanks
PB
