[sdiy] Possibly OT Tube Amplifier Question
sasami at blaze.net.au
sasami at blaze.net.au
Thu Apr 12 09:41:00 CEST 2001
Try triode electronics pages. Specifically:
Quick fixes for 7591A amps http://www.triodeel.com/7591.htm
Also look around other parts of their site because they
discuss Ampegs specifically, due to voltages used in the
Ampegs.
Ken
>Does it count as "on topic" if I want to use the amp
>with a synth? <grin>.
>
>Anyway, it's an Ampeg J12R Reverbojet. It's output stage
>is bad (uh, sockets are partially melted). I've thought
>about rebuilding it using matched 6L6 tubes (I have them),
>but I've been told that it may require resistor changes.
>I have the schematic, but I honestly don't know enough
>about tubes to re-engineer the circuit. The original
>output tubes are 7591. Both the 7591 and 6L6 are tetrode
>power types, the 6L6 being a little less powerful. I chose
>6L6 because I couldn't (at that time) find any type 7591.
>Perhaps I don't know where to look for replacement tubes.
>I wouldn't mind just putting it back to normal.
>
>-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
>-- Linux Rex | RedWebMail by RedStarWare
>-- FatMan: www.teklab.com/~chordman
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>
>
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