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Re: 4xEL34 cathode bias ZNFB - done before?

9/18/2000 2:34 PM
Ray Ivers	Re: 4xEL34 cathode bias ZNFB - done before? Lion, The Vox AC80/100 amp from the early/mid sixties uses this design, and is supposedly 'Class A' as well, although I never did the math on the one I worked on. Talk about heat! Sounded pretty good, though - loud and fairly clean, as you'd expect, with that Vox HF chime. It was real hard finding a set of new output tubes whose plates didn't glow red, as the owner wanted to keep it 100 percent original. Ray Ivers R.A.G.E. Electronics

9/18/2000 2:34 PM

Ray Ivers

Re: 4xEL34 cathode bias ZNFB - done before?

Lion,

The Vox AC80/100 amp from the early/mid sixties uses this design, and is supposedly 'Class A' as well, although I never did the math on the one I worked on. Talk about heat! Sounded pretty good, though - loud and fairly clean, as you'd expect, with that Vox HF chime. It was real hard finding a set of new output tubes whose plates didn't glow red, as the owner wanted to keep it 100 percent original.

Ray Ivers
R.A.G.E. Electronics

Replies:

lion Wild Bill. Thanks for the w... -- 9/18/2000 7:41 PM