Randall RM-100 Impedance switch

[JustMike]

Does anybody know where I can find one? I emailed Randall support. Hopefully they'll sell me one, but...

[JustMike]

OK, so I've decided to find a generic DP3T slide switch. Switchcraft makes them. Then I realized I need to know the current rating and I'm not sure how to calculate it. Is it as simple as A=W/V? But what would the output Voltage be? We're talking about the speaker output of a 100w amp.

[pdf64]

A 100W amp can put out up to 200W.
Power x resistance = voltage squared
Power / resistance = current squared

So 200W at 16ohms would require 56V and draw 3.5A

But as switching under load is an extremely bad idea, the switch contacts only need to be rated for ‘carry’, not ‘switching’, currents.

[EL34]

Does anybody know where I can find one? I emailed Randall support. Hopefully they'll sell me one, but...

I never trusted most impedance switches I saw on amps
That's why I used these monster rotary switches on all my amps


I sell them on this page
https://hoffmanamps.com/MyStore/catalog/Switches.htm

I have a shipment coming in on Friday