volker

FS: Tube microphone power transformer
« on: February 24, 2019, 01:07:36 PM »
Since I couldn't find an appropriate transformer for my microphone build, and after being disappointed with the offers for a custom one, I eventually decided to wind it myself. I have the laminations to do a couple more, so if anybody is interested let me know! I can do any HV/heater voltage combination, as long as the overall power is less than 10W. The one in the picture for example is wound for 160V/10mA and 12V/0,5A. AKG C12, ELA M 251 and similar stuff, no problem. The transformer will be properly vacuum impregnated.

18€ plus shipping.



okgb

Re: FS: Tube microphone power transformer
« Reply #1 on: February 24, 2019, 01:59:32 PM »
Nice work ! sounds like it could also do a single tube preamp ?
GKB Audio / Greg Boboski

volker

Re: FS: Tube microphone power transformer
« Reply #2 on: February 24, 2019, 02:52:29 PM »
Sure, that should work. I'll send you a mail, I think I still have your address.

duantro

Re: FS: Tube microphone power transformer
« Reply #3 on: March 03, 2019, 03:35:50 PM »
Hey Volker,
How large is the transformer? I’ve got an original psu for a Lomo 19a19 that has a dead power transformer, that I’d like to get working. Not sure if yours would fit? Here’s the specs:
input   voltage :    power  110VAC     
output voltage :    filament  5,9 V DC , 160 Ma 
 plate   100 V DC  ,   1 Ma   

tony hunt

Re: FS: Tube microphone power transformer
« Reply #4 on: March 04, 2019, 05:11:00 AM »
Excellent idea. PM sent.

Murdock

Re: FS: Tube microphone power transformer
« Reply #5 on: March 04, 2019, 05:32:01 AM »
Hey Volker,
How large is the transformer?


Yeah, would also be interested about the size.

volker

Re: FS: Tube microphone power transformer
« Reply #6 on: March 04, 2019, 06:35:34 AM »
Here is another one I just finished, fresh out of the bath. It will go into a AC701 equipped SELA T24.




duantro: those power requirements are perfectly fine.

tony hunt

Re: FS: Tube microphone power transformer
« Reply #7 on: March 17, 2019, 11:51:44 AM »
I really appreciate these three mic PT's that I ordered from Volker.
Turnaround was really quick.
One is for a "standard" D251 build.
The other two I specced with advice from Volker for home-brew builds of a 251 and a M49 where the PSU is to be close to the original. These both include a screens.
I hope the photo loads up because it is good clean work. 


volker

Re: FS: Tube microphone power transformer
« Reply #8 on: March 18, 2019, 08:59:04 AM »
You're welcome Tony! Hope to see more of your cool builds once you're finished!

panman

Re: FS: Tube microphone power transformer
« Reply #9 on: May 06, 2019, 06:14:11 AM »
I also ordered two trannies for Gefell N61. Excellent work from Volker! Just what I needed and he kindly taylored them for me.
Many thanks Volker!


 

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