Re: [gsp-2101]
2011-06-19 by Dieter Waechter
> The tubes in a GSP-2101 are 2 x 12AX7. These are preamp tubes which do > not have to be "matched" or "balanced". There is nothing special about > the tubes that came "stock" with a new GSP-2101. I believe the stock > tubes in a 2101 Artist were from Groove Tube. No! GSP 2101 Studio tube: Penta tubes GSP 2101 Artist: Penta tubes GSP 2101 Limited Edition: Groove tubes GSP 2101 Artist Pro: Groove tubes But these are no tube manufacturers! only branders! So you can not tell what tubes you have in your unit (mostly Reflector or Shuguang in both cases) > There are several manufacturers making new 12AX7 tubes, each with a > slightly different construction and therefore a slightly different tone. ??? No. There are only a few - the most important: JJ Electronics, Svetlana, Reflector, Shuguang, Full-Music, Cetron, KRON, Emission Labs) > Where to buy 12AX7 tubes? I have bought several different kinds of 12AX7 > from Doug's Tubes. Example: http://www.dougstubes.com/brands/tung-sol-tubes/tung-sol-12ax7-re-issue.html is a Reflector brand. > Doug Preston has a good selection, competitively priced, and he ships > promptly: http://www.dougstubes.com//preamp-tubes/12ax7-ecc83-7025.html hmmm. well.... Example: http://www.dougstubes.com/preamp-tubes/12ax7-ecc83-7025/penta-12ax7.html Is a Shuguang Silver Dragon (China). Really the best on the market (of current produced tubes) Same I have at the moment here: http://cgi.ebay.com/Tubes-Digitech-GSP2101-Artist-2112-2120-12AX7-12AX7A-/330566860807?pt=Guitar_Accessories&hash=item4cf7520007 But you can not use it in the GSP2101 without recalibrating, except you buy a selected for mutual conductance of approx. 1500 \ufffdMHOS. Dieter