Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: jjschessmaster on May 02, 2024, 08:19:44 am
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Looking at purchasing a single ended amp that runs a 5e2 princeton preamp into the power amp. I'm looking at modding the amp to use a matchless spitfire preamp (parallel triodes) vs the cascade of the princeton. Question is ultimately the spitfire is a push pull amp with a phase inverter. Is there a "significant" impact of omitting phase inverter circuitry by splicing the spitfire preamp onto a single ended power amp? I know its all subjective, but curious if there are any gurus that have tried this or see a glaring "don't even try, without replicating PI". My real concern is gain difference between parallel and cascaded triodes wouldn't give enough juice to the power amp.
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You don't have to replicate the PI but you will need another gain stage. Otherwise, your amp will likely be very quiet and lifeless.