Musikelektronik Geithain TMV2 Preamp Pictures

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R

rodabod

Well-known member
Joined
May 12, 2005
Messages
2,896
Location
London
I picked one of these up for £12 a few days ago. It looked interesting so I thought why not. Just wondering if any of you guys maybe had one?

It looks like an East-German, semi-professional mic preamp with DIN input and output, gain control, input debalancing transformer, discrete amp stage and then unbalanced out.

I'm beginning to wonder if this is for high-impedance mics since it says at the input:

Re > 1KOhm sym.

At the output it states:

Rl > 600Ohm asym.


The components remind me of the ones you see in older RFT/Gefell mics and some older Oktavas.

The transistor models are SF122 D KK and C O7 DK. Not they they will exist any more.

Pictures below (click to enlarge) :





 
Cool - I had no idea they made a mic pre but they do make the most insane loudspeakers...awesome sounding devices.

Thought the beeb just bought hundreds of pairs of RL906 for OB trucks etc?

Have you tried powering her up?
-Tom
 
[quote author="TomWaterman"] they do make the most insane loudspeakers...[/quote]

And I didn't know they made speakers!

Thought the beeb just bought hundreds of pairs of RL906 for OB trucks etc?
Click to expand...

I haven't seen those before - I was in the main lorry used for classical recording last week and they were using B&W 803 Nautilus speakers as part of a surround setup. They were telling me how they mixed and broadcast a surround classical mix live.

Have you tried powering her up?
Click to expand...

To scared! I need to put a new mains cable and UK plug on the end. Then I may switch it on with a long cane whilst wearing wellington boots.
 
LOL nice vision!

I remember the ME-Geithain and B&Ws having a similar pin-point mid-range FWIW.

Pretty sure you guys just bought a load of these fine speakers...

BTW what made you think it was for high impedance mics? Isn't an input Z of 1k pretty typical for a micpre? Or is that source impedance listed?

-Tom
 
[quote author="TomWaterman"]
BTW what made you think it was for high impedance mics? Isn't an input Z of 1k pretty typical for a micpre? Or is that source impedance listed?
[/quote]

Well, that's what I thought at first.... But then I got worried. I'm not sure what the "e" in Re would be short for. Eingabe?

But then, you wouldn't generally get balanced high impedance mics, so maybe it is for low impedance. 1K to 2K is typical for mic pre inputs. Phew - i think you may be right.
 
Re is almost sure the Input-Impedance (E = Eingang).
And I agree with Tom: The Geithain Speakers are the best I have ever heard in my life. They also made some musicians stuff like PA-Amps and Organs. And as well they made a very famous HiFi-Box in the 80's: The BR25 - produced in East Germany and thousands of them sold in West-Germany wia Conrad-Electronic. The high-freq-speaker in this tiny system is the same one as in the huge RL900.
 
I reckon she could sound pretty cool roddy!

I'd also suggest asking them - the gent I met once was a really funny likeable chap - English wasn't the greatest but then neither is my German!

It never stopped us chatting about loudspeakers...

-T
 
Hiya all,

This is my maiden post on here so,firstly, thanks to all for this wonderful place!
Rod, did you have any joy with your wellies/stick with this piece of kit?

I have one also, which i'm checking over prior to powering up.
Did you have any issues with the voltage difference (220v kit on our higher voltage mains?)
All the best, Griff.
 
[quote author="griffmeister"]Hiya all,

This is my maiden post on here so,firstly, thanks to all for this wonderful place!
Rod, did you have any joy with your wellies/stick with this piece of kit?

I have one also, which i'm checking over prior to powering up.
Did you have any issues with the voltage difference (220v kit on our higher voltage mains?)
All the best, Griff.[/quote]

I have re-capped it (some of the 10uF caps measured aboput 15pF). It doesn't seem to pass signal yet though. If I have more time I will work on it.

I wouldn't worry about our mains voltage.

Roddy
 
[quote author="griffmeister"]Many thanks Chaps! :grin:
I'll try re-capping and take it from there.
Griff[/quote]

Let me know the pin-out for the 5-pin DINs if you do. Mine sounded a bit one-legged.
 
[quote="rodabod"

Let me know the pin-out for the 5-pin DINs if you do. Mine sounded a bit one-legged.[/quote]

Will do Rod, hoping to get around to it soon-ish. First stop- caps..! :thumb:
 
Hello there!

very nice and interesting group.
I became also a happy owner of a yet not working TMV2 and I would love to get it back to life.
The trouble I have is: no input signal - only noise at the output.

I tried a couple of connections at the input as I was thinking to have somehow completely failed in configurating a proper cable...maybe I did.

If it would help I can take some proper hi-res pictures and translate from german into english if needed!

Would be great to get this little box back to life and maybe somebody can help?

Maybe some basics ;) ?

How should I wire into the input? I am using a MD-21 and DM-622 as main mics - got a proper Din connector and a Tuchel - mics are working properly. I tried so far all kind of pin variations - which one is the right one?

Recapping? only the white caps or also the silver one?

thanks for any help and advices.
Greets from the alps


 

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