I had got a German 19" case preamp in the last Millenium and It sounds amazing good as far as I can remember.
There was a double foot switch (1/4" stereo jack) for switching the bypass and to toogle between two gain values.
The Amp was createted as add-on for single channel amps to extend this to a two channel one.
I guess it was manufactured in the early eighties, but I sold it a long time ago.
I traced the Amp and redrawed later.
No I found the schematic in my schematic library.
Here is the schematic:
Baumgart - The Tubehammer Preamp [schematic]
- Manfred
- Tube Twister
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