I recently purchased a Studiotone ST20-C amp. I love it! It sounds beautiful, and it is very well made.
I would like to purchase a spare set of tubes. I see in the Operating Instructions that the amp contains these tubes:
EL84 (2, matched, duet)
Does anyone know the manufacturer of the tubes used by Koch? I would like replacements to duplicate the sound. I don't want to take out the existing tubes to check, as I know they are fragile. I've tried to contact Koch, and had no response. They sell replacement tubes, but they are located in the Netherlands, and I'd like to find a local sources.
Any good suggestions on where to buy new tubes?
Thanks very much!