5AR4/GZ34/5U4/5Y3 SS conversion

Conversion using UF5407 800V 3Amp 2-Pin DO-2 Soft Recovery Ultrafast Plastic Rectifier Diodes in a standard octal plug with the cap off of a fabric conditioner bottle a perfect press fit to finish it off :D
https://cursorium.co.uk/images/ssr-1.jpeg
https://cursorium.co.uk/images/ssr-2.jpeg

chris_w_uk03-25-2021 5:56pm

jasonbourne52 Details Discussions Posts This discussion Message User 2,863 posts 03-26-2021 at 07:13am Copy Comment URL Report Comment Edit Delete I think you will still need some dropping resistors added to equal the voltage drop of those tube rectifiers!
chris_w_uk OP Details Discussions Posts This discussion Message User 52 posts 03-26-2021 at 08:58am Copy Comment URL Report Comment Edit Delete The B+ has gone from 300V to 325V and from 290V to 315V at the OP valve plates, so as it is cathode biased I'm not too concerned. I'll put the tester inline with one of the OP valves and see what the plate and cathode current is to see if it's within limits. The EL84s were only doing about 10.5 Watts before.
chris_w_uk OP Details Discussions Posts This discussion Message User 52 posts 03-26-2021 at 09:51am Copy Comment URL Report Comment Edit Delete Well it certainly looks different :^) https://cursorium.co.uk/images/ssr-3.jpg https://cursorium.co.uk/images/ssr-4.jpg
noromance Details Discussions Posts This discussion Message User 9,710 posts 03-26-2021 at 03:55pm Copy Comment URL Report Comment Edit Delete I did the opposite--albeit on a preamp. Added a massive tube regulated power supply to replace diodes! See photo here