Thanks!bajaman wrote:
What do you think about to use the TL074 instead of the TL064?
The '74 is less noisy...
Thanks again
As far as I know, the BC547Bs behave as diodes when their collectors are disconnected. Hence you could sub these transistors easily with a priori any BJT, or even with regular silicon diodes. As for their role in the circuit, I'd say they introduce some hard clipping, but I'm no expert.rpc66 wrote:Could the BC547B's be replaced by 2N2222's? The hFE is min 200 for the BC547B and min100 for the 2N2222. Everything else looked to be in the ballpark. Please forgive my ignorance, but how would that affect the circuit?
Don't suppose there is a vero layout for the speaker load part knocking about to save me some time with the graph paper lolbajaman wrote: ↑18 Feb 2018, 03:45 Here you go - built it and verified - works very well - not a cabsim but an a speaker response load sim designed to duplicate the frequency response caused by the speaker load on a tube output stage.
Baja AC30 Top Boost amplifier overdrive 9v rev 1 with speaker response loading 170218.GIF
I had completely forgotten this design, so many thanks to HENK for pointing this one out
cheers
bajaman