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RE: Fisher FM-1000 Crystal Oscillator

128.48.7.107

In Reply to: RE: Fisher FM-1000 Crystal Oscillator posted by clelow on May 23, 2007 at 10:11:37

Hello, clelow:

Most typical examples of the FM-1000 only feature an optional provision for a "drop-in" module which was provisioned for a crystal-controlled front-end. Tuners of this ilk only have a flat piece of metal covering the opening. You will notice that on the front panel of the FM-1000, on the lower right, there is a knob which can be turned to select the "crystal controlled" portion of the circuit, which functions as a locked-in option, as opposed to straight tuning. The reason was simply for stability under prolonged, isolated monitoring conditions, hopefully without any drift in frequency, in a professional environment, hence the name "Professional FM Monitor Tuner".

I believe that most versions which featured the installed module were designated "FMR-1" and were genuinely intended to be used as professional FM broadcasting monitor tuners. Most came with equipped with gray panels, rack handles, as they were manufactured in standard 19" length to fit into relay racks. The knobs were not the ones with the spun brass cap pieces, but with the older style rim caps with "^" position markers.

You can see a nice image of an FMR-1 on the FisherDoc's web page, if you care to examine one.

I have a friend over in San Francisco, a former radio station chief engineer, who owns an FMR-1 and it has the module installed.

I own two FM-1000 tuners, one which works and one which came to me years ago in a trade but is rather messed up internally by the former owner, who I hope is now locked up and kept far away from soldering tools to protect the innocent.

When working properly, the FM-1000 is a nice instrument, but the meters are subject to all sorts of misbehavior, and were, as most Fisher meters, manufactured for Fisher in Japan. They often get sticky or just fail.

If you have an eye on an FM-1000, please be aware that there are some problems associated with keeping them running properly.

I know.

Richard Links
Berkeley, CA

Follow Ups:

RE: Fisher FM-1000 Crystal Oscillator - clelow 08:06:45 05/24/07 (0)

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