Roger from Music Reference is Roger from Ramlabs. Seems like the right person to call.
14 responses Add your response
Yes they have to be matched. The plates should be matched between the tubes in the method specified by RAM, AB for V1 and BA for B2, meaning the outer plates of each tube and the inner plates of each tube.
Best to get the tubes from Roger. I use the stock tubes as supplied by RAM and they are very quiet. The sound is also more than acceptable. I believe Roger can supply some nice Sylvania NOS 12AX7 tubes in addition to the stock Yugo tubes.
The tubes are not special, the way they are measured and matched by Roger is, and they happen to be very good tubes, the Eis that is. That being said, I suspect you would do fine with a set of tubes matched by Jim McShane, or Andy at Vintage Tube Services for NOS. I stick with Roger's tubes because nobody matches better, and he voiced the amp around his tube - keeps tube neurosis from setting in:)