• If you have bought, sold or gained information from our Classifieds, please donate to Group DIY and give back.

    You can become a Supporting Member which comes with a decal or just click here to donate.

Lomo germanium mic/line preamps + transformers

GroupDIY Audio Forum

Help Support GroupDIY Audio Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

sanjok

Member
Joined
Nov 3, 2013
Messages
10
Location
Moscow
For sale Lomo germanium mic preamp including original input step up transformer 1:3.
This preamps were a part of Lomo 4ch powered mono mixer. Preamp itself contain 3 germanium transistors. It can be used as mic preamp with step up transformers or preamp for line level signals.
This quite interesting schematics, small amount of current flows to the base of the first transistor through the transformer's secondary winding. Approximately 2 microamps. It is enough to open transistor but not enough to magnetize transformer core. Honestly, this preamp sound great. Overall gain with step up transformer approx. 38-40dB.
One card and one transformer including shipping 55€. 2 sets 100€. Free shipping worldwide.
Have 8 pcs for sale.
Let me know if you have any questions.
 

Attachments

  • hkxtpawzlzj34icsc68h[1].jpg
    hkxtpawzlzj34icsc68h[1].jpg
    151.9 KB
  • germanium card.jpg
    germanium card.jpg
    93.7 KB
  • ankxfk25vgct6qvvmuqn[1].jpg
    ankxfk25vgct6qvvmuqn[1].jpg
    124.1 KB
  • gsyjgpugkxifjoopvcfc[1].jpg
    gsyjgpugkxifjoopvcfc[1].jpg
    203.9 KB
  • ntbgwe3fzc9lz4wae6ab[1].jpg
    ntbgwe3fzc9lz4wae6ab[1].jpg
    131.5 KB
Last edited:
I wasn’t going to ask questions where shipped from…a couple sellers from there have found proxy locations, but yes it seems most over there have to sit tight for now.
Another reason to hope for peace.
 

Latest posts

Back
Top