Quick look inside the front end sweeper module. Quite a lot of discrete logic to decode the frequency dials.
Was curious what's in the shielded box.
Couldn't find any service data or schematics. But this doesn't look all that complicated at first glance.
Couldn't find any service data or schematics. But this doesn't look all that complicated at first glance.
The other module is much simpler. No decoding logic needed there. Just fixed frequencies for markers
Flip side of the chassis. Besides regulated +-15V rails there's also some electronics that's connected to the external control connection
Plugged it in, line filter didn't blow up. Filter caps are fine, <25mV RMS ripple on -15V, <5mV RMS on +15V. There is no RF output from the upper unit, and only a CW at around 11 Mhz from the lower. No sweep. Adjusting the sweep width adjusts the frequency a bit. Time to trouble shoot with no schematics
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