• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Transformerless Tube Amp

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Tarzan

Tarzan

Member
Joined 2004
I recently stumbled accross some old magazines from the early sixties.
They had a small article on transformerless power amps.
I did a quick search on the net and found the following pattent extract:

http://www.google.com/patents?id=fo1sAAAAEBAJ&dq=3092783
E.H. Krohn Power amplifier US Pattent 3.092.783

Here I read that the load is 600 Ohms; a bit unpractical nowadays.
Outout Power is more then adequate.

I keep on searching further and like to know if any one had or has experiance with this kind of amplifiers.

The field of usage is mainly Musical Instrument amplification. No HiFi.
How will this amp behave under the harsh road and stage conditions?

Cheers,
Tarzan
 
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