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As of now, the analyzer is working but the vertical output is low, good in center of screen, the MC1550G IC is a good replacement, confusion because of pin 1 and 10 being different, MC1550G is correct, ECG816 is not correct. good news is I had 3ea MC1550G's, 2.5 hours to replace
I need to...
As of now, the attenuator needs cleaning but my Boonton 102A, output died, dirty attenuator. The manual scan did not work , the section of the Manual / Auto switch open do I switched the failed connection to one not used.
The AL50M has a DBM scale (75ohm) and the VSM-1D has mv reference with neg...
I did get it working however the signal level needs calibrating, After getting the pin 1 / Pin 10 straight on the IF amplifier, I was able to identify the IC, it is a MC1550G, my analyzer has SK3242's. It took over two hours to replace them but it is alive now. I have a AL-50M that works but...
Hello,
I am looking for a VSM-1D also, someone applied 120Vac to the 12V dc input, I have most of it working except the IF input ckt? There are 4ea SK3242 Ic's which do not seem to be the same as the RCA replacements because of the pinout / DC voltages. This is somewhat difficult to work on and...
I am also looking for a schematic for VSM-1D or Texcan AL-50M
Someone applied 120Vac to the 12V dc input. I got the HV and sweep circuits but having no luck with RF , replaced 9ea IC's and 4ea transistors so far.
Only found a AL-51A block diagram
I will keep looking and post If I find anything
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