Re: Racal 9081 SSG No FM but he meter reads OK
Here are the two versions of the FM Board
The early one is a closed loop system, keeping the modulation depth constant over the tuning range. The newer version uses an open loop FM system, which must be constantly re-set, using the modulation meter, when changing frequency.
If it is the older version, I do have the complete scan of the manual, but it is typical Mauritron quality! (10MB)
The newer version is the file I uploaded to KO4BB some time ago.
Peter
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