Microphone preamp ?

[Paul P]

Does anyone know of schematics for a nice tube-based microphone
preamp ? Preferably 2 channels with phantom power.

I've found this one so far :

http://www.tangible-technology.com/tubes/1566/1566.html

Any comments as to the suitability of running microphones through
tubes would also be appreciated.

Paul

[steve]

Does anyone know of schematics for a nice tube-based microphone
preamp ? Preferably 2 channels with phantom power.

I've found this one so far :

http://www.tangible-technology.com/tubes/1566/1566.html

Any comments as to the suitability of running microphones through
tubes would also be appreciated.

Paul

Not a schematic, but Hamptone sells this kit:

http://www.hamptone.com/HVTP2.htm

steve

[markbul]

http://www.frontiernet.net/~jff/pultec_mb1/Pultec_MB1_proto.html

[Enzo]

Here are a bunch of them:

http://www.waltzingbear.com/Schematics/Schematics.html

[Paul P]

Thanks for the links, lots of interesting stuff to read. I've found many
solid state circuits, which look easy enough to build, but not that many
tube circuits. The Pulteq is more or less what I was looking for, a simple
tube circuit to study.

I just found the following, which looks like it would be hard to beat. A
tube mic preamp (with ss power supply) that meets all my requirements :

http://www.gyraf.dk/gy_pd/g9/g9pd.htm (http://www.gyraf.dk/gy_pd/g9/g9pd.htm)

except that it uses European parts which might be a slight inconvenience,
my living in North America...

This should keep me busy for a while.

Paul

[Amp Kat]

Go to the jensen transformer website and check those out. One thing is if you build them go as close to the specs as you can. Whatever mic pre you build use an input transformer. The Cascodes are very nice.