[amsat-bb] Spectrum Analyzer

[gi pi]

Hello everybody , i'm serching (desperately...  ) service manual for Spectrum Analyzer SYSTRON DONNER Tuning Unit Model 809-1 
I've some trouble but without electrical sketch or Service Man i can't resolve the problem..
Any informations are welcome!

73 from Giulio IZ4FVW 
Amsat-NA Member 36417




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