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Chris55000 · 22nd Jun 2021, 10:58 am

Hi!

Without going to "valvephoolery" prices, the OP can get a reasonably priced EC91/CV417/6AQ4 from this link:–

https://www.ebay.co.uk/itm/Mullard-K....m46890.l49286

The EC91/CV417 should work if the leads to pins 5 and 7 are swapped over, and any wiring to pins 1 or 2 transferred to pin 7, and anything on pin 5 transferred to pin 6!

ECC91 (original) base:–

1:– a', 2:– a", 3:– h, 4:– h, 5:– g' 6:– g", 7:- k

EC91/CV417 (suggested):–

1:– k, 2:– g, 3:– h, 4:– h, 5:– k, 6:– g, 7:– a

Chris Williams

22nd Jun 2021, 10:58 am	#11
Chris55000 Nonode Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 2,868	Re: Advance E2 Signal Generator fault Hi! Without going to "valvephoolery" prices, the OP can get a reasonably priced EC91/CV417/6AQ4 from this link:– https://www.ebay.co.uk/itm/Mullard-K....m46890.l49286 The EC91/CV417 should work if the leads to pins 5 and 7 are swapped over, and any wiring to pins 1 or 2 transferred to pin 7, and anything on pin 5 transferred to pin 6! ECC91 (original) base:– 1:– a', 2:– a", 3:– h, 4:– h, 5:– g' 6:– g", 7:- k EC91/CV417 (suggested):– 1:– k, 2:– g, 3:– h, 4:– h, 5:– k, 6:– g, 7:– a Chris Williams __________________ It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed! Last edited by Chris55000; 22nd Jun 2021 at 11:20 am.