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Old 27th Sep 2009, 5:51 pm   #3
YT2095UK
Retired Dormant Member
 
Join Date: Sep 2009
Posts: 487
Default Re: Pentode amp experiment.

absolutely, pin for pin and double checked as always before I powered up.
in fact your wiring is excatly the same as I used in the OP stage of my amp that I made a few weeks ago, only I used a 1K resistor to take g2 to Anode rather than directly wiring it.
so I know what you said works
as for Biasing, there is none, the Cathode is Hard to deck, no RC coupling at all.
the Control grid (g1) is pulled down to deck via a 3.9M ohm, and fed with a 0.05uF cap.

I`m using the EL34 because I know that worst comes to worst, it wouldn`t matter too much How I wired it, the power I`m using wouldn`t destroy it without me knowing about it in plenty of time before hand.

as for RF on an EL34, I can say that LW is easily amplifiable (is that even a word), I`ll have to get the sig-gen out and try that, noting the drop off (I`m keeping plenty of notes!).
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