Quote:
Originally Posted by woodchips
Some thinking around and found a circuit where a pentode would act as a two stable state divider, halving the number of heaters at a stroke.
Still need a lot of pentodes, hence the quick search for the unwanted Uxx valves, but none. Can get EF80, EF91 from places, at £8+ each, which seemed a bit much.
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Here you go, brand new B7G pentodes at 61 pence each!
Illustrative listing, there are plenty of others.
https://www.ebay.co.uk/itm/5PCS-6J2-...kAAOSwerdanVDs