Solid State Guitar Amp Forum | DIY Guitar Amplifiers
Solid State Amplifiers => The Newcomer's Forum => Topic started by: saturated on August 12, 2026, 01:32:04 AM
I'm the proud owner of some now
Hopefully a situation arises where I need one or two xP
I thought the specs were somewhat intriguing :tu:
And the price $$ is nice :dbtu:
What's special about those?
They are high voltage: collector-emitter voltage can go to 200V. 300V for the MPSA43.
They are useful for low-current, high(er) voltage amplification and switching.
Everything is a compromise.
They get higher Vce, 200V, so useful in high power amplifiers which work with high voltage rails but pay for that with quite reduced current gain Hfe , so I wouldn´t build a preamp or pedal with them.
They are not your typical general purpose transistor.
Interestingly, I had some of these kicking around (no idea how I came to have them, but I've had them for YEARS) and am using them for an RGB controller. It's only running 9v, but I had no other use for them and they work well.