Once again, guitar amp tech Skip Simmons is fielding your questions on all things tube amp. This week's sponsors: iZotope (use the discount code FRET10 to save 10% off your order), Amplified Parts and Grez Guitars. Want to support the show? Be a part of our Patreon page. Some of the topics discussed on this week's episode: 1:13 Three nightmares left 7:17 Sam's Wurlitzer 920 combo amp from Ep. 62, revisited 9:14 Special guest: Ian Moore (Austin, Vibroluxes, Deluxe Reverbs, Marshall mods and salsa dona!)   44:26 What to do with an unusual 1968 Gibson Falcon chassis missing a cabinet?  48:48 Building a clone of Ampeg R-12-R Reverberocket 56:21 A vintage Jenson P-15Q with a quarter inch jack mounted on the speaker frame 58:14 Mary Halvorson 59:31 A Dukane PA with a low B+ voltage 1:03:21 How did Skip accumulate a barn full of PAs? 1:09:09 "Historic" or "historical;" a Bogen Challenger CHA33 with pitting on the chassis 1:15:00 How to properly use an ESR Meter; the Anatek Blue ESR meter (link) 1:19:00 The dwell on a reverb tank 1:21:02 Where does distortion come from; author C.J. Box 1:23:12 Testing a vintage power transformer before you install it 1:26:46 Mathew Fitzwilliam's Goldentone Amp book, revisited (link) 1:27:15 Restoring a Goldentone 1761 Soloist; ozvalveamps.org 1:30:33 Chris from Deluxe Amplifications' amp chassis holder (YouTube, blueprint available on our Patreon) 1:33:39 Guitar Shorty 1:36:36 The smallest mountain range in the world 1:37:32 Installing a separate filtercap eyelet board in a BF Fender 1:41:19 Using a vintage Jensen C12S speaker in a Princeton Reverb clone; bean pasta 1:49:15 Shrunken model airplane tissue  Have a topic for a future episode? Email or send us a voice memo to: podcast@fretboardjournal.com or leave us a voicemail or text at 509-557-0848. Be sure to check out the ever-growing Big Index of Truth About Vintage Amp topics to see if your amp questions have already been covered.