Quote:
Originally Posted by maxhifi
Ok true, but the culture of the time was to use as much negative feedback as would make the amplifier unstable, and then back it off a bit. Given this sort of treatment, beam power tubes formed the basis of high fidelity amps from the early 50s until the end of the tube era. Triodes were still around but no longer mainstream territory.
|
This is the entire basis of the Williamson, which despite the beam power tube output valves, is in essence just another triode amplifier. If you're tying the screen grid to the plate, you have a triode.
I would say that post-1954, neither the straight beam power tube arrangement nor triode strapping was terribly popular in comparison to the distributed loading arrangement popularized by Hafler and Keros.
No matter what camp someone is in, commit to one and don't go the distributed loading route. It is quite simply a mixture of the worst characteristics of triodes with the worst characteristics of the beam power tube/pentode.