On 10/11/17 09:32, Phil Allison wrote:


The AVO looked like a step up from our current 1950s tester...


** If you can find one, it will likely cost you an arm and a leg.

You're not wrong there...
https://www.ebay.co.uk/itm/AVO-VCM163-tube-valve-tester-/112634545228

--

Jeff