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Chris55000 · 17th Jun 2021, 11:16 pm

Hi!

The booklet for the E2 on "Jon's Valve Page" looks to be a more modern booklet, that does make reference to an ECC91/6J6 valve in the RF oscillator box – the diagram incorrectly labels it as "ECC82!"

The ECC91 can be found all over the 1968 edition of the RSGB "Radio Communication Handbook", it was used for virtually almost anything!

It has an anode resistance of 7100 ohms and a gm of 5.5 mA/V at –1.5V GB.

This valve is plentiful and cheap n.o.s., typically £5 plus £3 p and p, so I wouldn't bother guessing about its condition or substituting it!

Chris Williams

17th Jun 2021, 11:16 pm	#6
Chris55000 Nonode Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 2,870	Re: Advance E2 Signal Generator fault Hi! The booklet for the E2 on "Jon's Valve Page" looks to be a more modern booklet, that does make reference to an ECC91/6J6 valve in the RF oscillator box – the diagram incorrectly labels it as "ECC82!" The ECC91 can be found all over the 1968 edition of the RSGB "Radio Communication Handbook", it was used for virtually almost anything! It has an anode resistance of 7100 ohms and a gm of 5.5 mA/V at –1.5V GB. This valve is plentiful and cheap n.o.s., typically £5 plus £3 p and p, so I wouldn't bother guessing about its condition or substituting it! Chris Williams __________________ It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed!