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Author Topic: Triode Connected Cathode driven 807s  (Read 10028 times)
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WD5JKO
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WD5JKO


« Reply #25 on: October 08, 2011, 10:57:13 AM »



A variation here is the EL-34, a true Pentode with a separate suppressor pin at the base. One version, the E34L from Penta (Teslovak) boasts a 32.5 watt plate dissipation. I use one in grid driven service on a modified Central Electronics 20A that make ~ 55 PEP on 80m in linear mode. It has 700V plate, and 300v G2 on it.

http://www.pentalabs.com/pdfs/EL34S.pdf

If I were to try this as a GG amplifier, I would include the filament as being driven like is often done with the 8877. This minimizes any heater to cathode leakage problems. I bet this series of tubes would do well as a RF amp when cathode driven.

Jim
WD5JKO
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