30 bucks at Musicians Friend. http://tinyurl.com/6pc3bb8 Tube Store has the JJ tube at 11 dollars for one. http://thetubestore.com/tesla12ax7.html On 2/7/2012 1:23 PM, wpio fm 89.3 wrote: > I use TubeMPAudio by ART. They're about $40 but come with a sorry > 12AX7. Get a JJ tube for about $10 and you've got a good warm sound > with a limiter if desired.