On/Off switch for RM_9 Mk1 does anyone know the voltage that isneeded for switch?

The switch should be rated 250VAC and at least 10 amps. I would expect these specs to be printed on the old part.

The switch should be bypassed with a .01uf 1000V capacitor to prevent arcing. Its not a bad idea to install a current inrush limiter if one is not already present.

Oops, sorry again Tony! I found the correct number which Roger gave me, the 415 Area Code one. I'll be in touch about the tubes---Eric.

Just last week I called Ram labs with a question about my RM9.  Got voicemail so (at their suggestion) I emailed them.  Roger answered in less than 24 hrs, with a suggestion that actually solved my problem!  Can't ask for much better customer support for a 20+ yr old product!  And manoman, did he ever build a keeper when he conceived of the RM9!!!

I have my answer thank you all for posting

Roger silk screens the tube biasing info on his amps top plates, so that in fifty or a hundred years they can still be optimized. Built to last, and sound real good long after more fashionable amps have been long dead, their many owners having finally gotten sick of repairing them when a bad tube blew them up or set them on fire.