Amp tech Skip Simmons is once again fielding guitar tube amp questions from around the world.  Submit your question to Skip here: podcast@fretboardjournal.com or, better yet, leave us a voicemail or text at 509-557-0848.  2:39: Special Guest: Bill Krinard (Two-Rock Amplifiers): Troubleshooting a Fender Tonemaster that pops when turned off; Bodega red potatoes; Bill's current projects; flipping the pilot light) 34:45 This week's sponsor: Grez Guitars (link, get a behind-the-scenes Grez shop tour here) 35:39 Tips on buying a tube tester (Skip’s fave: B&K 700) 45:05 Speaker recommendations for a Champ 47:58 Troubleshooting an early '70s Fender Bassman 50 with hum 1:00:57 Choke talk 1:05:31 Cast iron cleaning 1:10:55 Vacuum Tube Valley online (link) 1:13:53 RIP Art Dudley (FJ and Stereophile contributor) 1:14:10 Skip’s hi-fi setup 1:18:14 A Garnet Pro with built-in Stinger fuzz that sounds worse as it warms up 1:22:49 Skip's book tips