• 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.

Guyatone GA1100D

Hi

One of the 4 diodes that make up the bridge rectifier has blown. The part number is SR1K 16. I am unable to get this diode. According to the datasheet, it is rated 800v, 0.8A. It is a fast recovery diode which I think is a fast switching diode. Can I replace it within a 1N4007. I dont understand why this diode which is a fast switching diode is used when my mains frequency is only 50Hz. So can a 1N4007 be suitable. Please assist.

Thanks
 

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Guitar amplifier people . . .
When bringing a Guitar amplifier question to the Tubes / Valves threads, please announce "this is for a guitar amplifier".
That way, idiots like me will know it is not a Hi Fi or Stereo playback amplifier.
Thanks!
 
Carlosraj,

It is OK, to post on Tubes / Valves.

But I just ask that the original poster mentions that it is a guitar amplifier.
I have different answers for a guitar amplifier, versus answers for a Hi Fi Stereo amplifier; those are generally 2 distinctly different devices.
I need to know which thinking cap to put on . . . guitar amp; or Hi Fi Stereo amp.
 
The schematic says 6l6 GT this should be 6l6 GC. The latter can stand 450 V ( as used here) the 6l6 GT can stand only 300V on g2 and max 400V on the anodes. As Kay said It's an exact replica of the Fender amp ( I repaired many of those).
 
Not completely exact, see the PSU section (bridge rectifier here vs. full wave in the Fenders). Anyway, this doesn't matter that much imho.

Btw, there's a mistake in the Guytone schematics shown above: The reverberation amplifier triode must read ½12AX7 instead of 12AT7, see the other V4 half and the Fender schematics.

Best regards!