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Author Topic: RFT Gefell 691/692 Power Question  (Read 19596 times)

hasbeen

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Re: RFT Gefell 691/692 Power Question
« Reply #15 on: October 25, 2012, 12:10:53 AM »

Thank you all for excellent documentations! The forum at its best!

KH

+1 on that! Yes Thanks!!
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Who Is John Galt?

panman

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Re: RFT Gefell 691/692 Power Question
« Reply #16 on: October 25, 2012, 02:26:04 AM »

Regarding PM750: it can be converted like MV692 ,its actually is a (kind of) MV692 without the pad and hi pass switches. The capsule in PM750 does indeed miss the internal resistor but the voltage drop is taken care of in the circuit (R2) as well as 10 dB pad (C1) and hi pass (C6). See attached schematic.

Yes, I have the schematics too and you are right again. However I am talking about this "straight wiring" and I once measured the voltage from a PM 750 and got that 52V on the capsule. I`ll try to attach the drawing again in a few days, because I am travelling and have no time because of that.
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Esa Tervala

hasbeen

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Re: RFT Gefell 691/692 Power Question
« Reply #17 on: October 30, 2012, 07:56:01 PM »

Any of you guys have the ability to build the adapter Sredna kindly posted? I unfortunately do not have the skills. Or the "inside the mic" mod? Of course I will pay for your services. Thanks!
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Who Is John Galt?

klaus

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Re: RFT Gefell 691/692 Power Question
« Reply #18 on: October 30, 2012, 08:16:12 PM »

Those who can assist with the mod:
Please contact 'hasbeen' privately.
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Klaus Heyne
German Masterworks®
www.GermanMasterworks.com
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