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Service / Tech needed for RFT MV/810 2
Old 13th February 2019
Gear Nut

Service / Tech needed for RFT MV/810 2

I have been having issues with the gain knobs on my RFT MV/810's for years now. A little scratchy, a bit intermittent. But lately the gain knobs on one of the units has gone completely south. Recently I had to kind of push/pull it get it to kick into to the appropriate gain setting. Kept popping into full gain mode. Lately it just won't work at all, and is in full gain mode regardless of the Gain knob setting, now with a little weird buzz introduced as well. The right channel is mostly working fine.

Anybody have suggestions about someone I might be able to send these units to to get them serviced? Thanks a lot! - Steve
Old 15th February 2019
Gear Head

The MV810/2's has open-frame brass switches, which means they can be cleaned with a good contact cleaner. However, the contact surfaces of the gain switch also have little tabs that might easily fall out and this might lead to dead gain steps etc. Lastly, the wires leading to these switches are fragile solid core wire that gets brittle with time. They, therefore, break easily and would be another thing to check. Any good tech should be able to give you a verdict, and help either clean the switches or wire up a new stepped gain switch (which is the same for every mic pre, just different resistor values). Good luck!
Old 4 weeks ago
Here for the gear

the rotary switches are made with silver plates. The best way is to dismantle the switches and clean them in a ultrasound bath.
Then seal them with Cramolin protection and special lubricant.

After this procedure you can use these switches over a long time without problems.

Best regards


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