Bogen CHB-50 Rebuild

[physics]

Nice amp! The I'd suggest keeping one of the channel as grid-leaked baised because it is interesting sound but the main channel should be converted to cathode-bias since the grid-leak biased inputs cannot tolerate really high input signals that some pedal players may use.  The Aux inputs are meant as line ins so they may not be too useful.

These are not all that hi-fi.  They have character.  The overall build is rather tweed-like.  For a more modern player you probably will need to roll off some low end to keep it from being woofy and there are places to add gain if you want to.  You could also experiment with the negative feedback loop.

It looks like a fun project!

Thanks for the feedback! Especially regarding the grid-leaked bias stages. Was originally planning on just rewiring both of them, but if the sound is at all usable I'd say it's worth leaving at least one like that for my friend to try.