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Koch Studiotone Amp - Do you know what brand of tubes they use?


CLR4TKOFF

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Hello!

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:

Preamp:

  ECC83

  12AX7

  7025

 Power 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!

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