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Author Topic: Gefell pm 750 conversion  (Read 437 times)

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Offline scrtaper

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Gefell pm 750 conversion
« on: November 04, 2018, 10:57:13 AM »
Does anyone know of a cable.or adapter to run the gefell pm750s on phantom power? If I have to get them modded suggestions on who does them is greatly appreciated
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Offline dactylus

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Re: Gefell pm 750 conversion
« Reply #1 on: November 04, 2018, 11:30:00 AM »
Peter Drefahl of Drefahl Audio in Germany converted several Gefell MV692's to 48V phantom powering for me 8-10 years ago.  The Gefell PM 750 is very similar to the MV 692, the PM 750 uses a large exterior housing to protect the microphone capsule which is not used on the MV692.

Peter also replaced some of the older, noisy "East German" electronic components in the Gefell MV692 amplifiers at the same time that he did the P48 conversion.  I think that you would want to replace those noisy components in the PM 750 too.

Peter is a well respected microphone technician and does excellent work!!  I can't recommend him highly enough.  The downside for you if you don't live in Germany is that you'll have to ship the microphones to Peter in Germany.

Peter speaks English and will be happy to provide you with an estimate for the 48V conversion for your mics.  Here is the ink to his web site.

http://www.drefahlaudio.com/

« Last Edit: November 04, 2018, 11:32:51 AM by dactylus »
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Offline DSatz

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Re: Gefell pm 750 conversion
« Reply #2 on: November 06, 2018, 05:09:34 AM »
Drefahl has an excellent reputation, but let me suggest that you [also] contact Microtech Gefell directly, and ask them if they will do what you need. I know that they have done modifications of this general kind before with other older models of theirs.
music > microphones > a recorder of some sort

Offline John Willett

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Re: Gefell pm 750 conversion
« Reply #3 on: November 10, 2018, 01:25:20 PM »
Drefahl has an excellent reputation, but let me suggest that you [also] contact Microtech Gefell directly, and ask them if they will do what you need. I know that they have done modifications of this general kind before with other older models of theirs.

Agreed - and any repair that Gefell do, they put the mic. back in the anechoic chamber to make sure it is fully up to spec. before they return it.  :coolguy:

 

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