With audio demo: 1960s Siemens V274 mic preamp: 16 .. 48dB gain - recapped, full plug & play!

1960s Siemens V274 mic preamp

The V274 was initially designed as a distribution amp for line level signals.
It features a very sturdy output section, capable of driving low Z loads.
All of the bigger Siemens "Sitral" broadcasting consoles were loaded with a plethora of these modules.

All discrete topology, with beautiful Siemens and Haufe made transformers on the input and output.
The same kind of iron you'd find in a V276 or a V272.

The following modifications have been done:

- Replaced the audio coupling capacitor C13 in front of the output transformer
- Wired the 3 individual output windings of the output transformer in series to add gain
- Wired the two input windings of the input transformer in parallel vs. in series to lower the input
impedance and to add another 6dB gain
- Added a gain knob to the front panel. Its range is 16 .. 48dB
=> Ideal for work with condenser mics or dynamic mics on louder sources.

The Siemens really has a beefy tone to it.
Lots of mojo from the transformers.
Check out my audio demo above (on the picture bar all the way to the right).

It comes with a matching harness with XLR I/O and power.
The PSU will run worldwide with 100 .. 250V mains.
I'm throwing in a mechanical adapter piece for US power sockets if needed.
Full plug & play!

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Overseas shipping via courier - UPS or DHL Express, depending on daily prices and destinations.
ETA to the US: 3-4 working days.
Postage to the US quoted here is a guestimate as it varies from state to state.
Please reach out for an exact quote.

Private sale