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Moving over to concertina is essentially what Fender did with it's "E" series Tweeds. All the previous iterations were see-saw inverters and most used the standard "Tweed Deluxe" type circuit that other manufacturers also used during that period.
To my ears the concertina amps sound different. Not better or worse but more refined and the breakup has a different voice. That said I have built those with the typical E series values so I might not be comparing apples to apples. Maybe using the higher plate resistors (250K v.s 100K) with higher value cathode resistors and a grid-leak input stage will bring it closer to sound I am wanting and ability to PS more easily? The mix tubes in the output stage would be easy to try as well. Thanks for the suggestion!
To my ears the concertina amps sound different. Not better or worse but more refined and the breakup has a different voice. That said I have built those with the typical E series values so I might not be comparing apples to apples. Maybe using the higher plate resistors (250K v.s 100K) with higher value cathode resistors and a grid-leak input stage will bring it closer to sound I am wanting and ability to PS more easily? The mix tubes in the output stage would be easy to try as well. Thanks for the suggestion!
