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G6Tanuki · 8th Oct 2019, 4:52 pm

Can't help with the diodes directly, but they look the same as the one used in the 'noise limiter' of my Eddystone 840A - which having lived for 60+ years had evolved from being a diode and was instead better described as an 'asymmetric resistor' - 70KOhms in one direction, 30KOhms the other - meaning it worked great as an attenuator but uselessly as a noise-limiter.

I replaced it by an OA47 Gold-Bonded diode.

8th Oct 2019, 4:52 pm	#57
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 14,007	Re: Moreton Cheyney Can't help with the diodes directly, but they look the same as the one used in the 'noise limiter' of my Eddystone 840A - which having lived for 60+ years had evolved from being a diode and was instead better described as an 'asymmetric resistor' - 70KOhms in one direction, 30KOhms the other - meaning it worked great as an attenuator but uselessly as a noise-limiter. I replaced it by an OA47 Gold-Bonded diode.