[Test-Equipment] Singer Spectrum Analyzer MF-5 and VR-4 Info Pse

[AB3L1 at aol.com]

Hello,
The subject line says it. I would like to find manuals or at least  
schematics for these units. I finally found the VR-4 after a few years of  looking and 
would like to get them cooking.
 
Thanks,
 
Bob AB3L