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Switchable plate resistors.

Posted: Fri Aug 24, 2018 2:50 pm
by Metromonkey
Has anyone on here ever messed with switchable plate resistors to be able to choose the amount of compression?

Or would this not work in the way i would expect it to?

Re: Switchable plate resistors.

Posted: Fri Aug 31, 2018 3:24 am
by Roe
be careful, this is somewhat dangerous. USe a good switch and switch only with the power off. It is easier to switch the cathode resistor

Re: Switchable plate resistors.

Posted: Fri Aug 31, 2018 9:22 am
by Metromonkey
So, is this something that is done or not really?

If i would try this i would put two resistors in parallel and bypass one if i wanted to raise the resistance.

Re: Switchable plate resistors.

Posted: Fri Aug 31, 2018 8:38 pm
by danman
I don't believe that I have ever seen it done...at least not on the bigger brands. Like Roe mentioned, be sure to use a quality switch and it's probably best to only switch when powered down.

Re: Switchable plate resistors.

Posted: Thu Sep 06, 2018 4:14 pm
by FourT6and2
Maybe try a pot instead? One rated for big power. I don't see why it wouldn't work. I use a high-wattage pot to test B+ dropping resistor value. Should work for the V1a plate load resistor too.

Re: Switchable plate resistors.

Posted: Thu Oct 18, 2018 11:32 am
by D-Max
You could build a circuit with high voltage FETs with low internal resistance instead of a switch or relay.