• 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.

philips el6400 tubeamp

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#2
I have hooked the amp up on one of the mic inputs to the computer cd-rom unit as source nad i must say it sounds really good.

Heres some pics of the amp:

Crappy top view
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Front view
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Side view
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Underneath left
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Underneath right
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And the marking plate
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#5
I have the schemo but thanx anyway. What does irt take to turn this thing into a guitar amplifier ? About what plate to plate impedance is the OPT, around 5-10k ? The amp i have here uses EF86, not EF40 as in the schemo.
 
#7
Goodness, this amplifier was made before safety was invented!

Seriously, get rid of those selenium HT rectifiers. When they expire, they have a nasty habit of taking the mains transformer with them. Measure the HT before removing them, then replace them with silicon diodes (1N4007), and if necessary, add a little series resistance between the transformer and the rectifier to restore the correct HT voltage.
 
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