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The Truth About Vintage Amps with Skip Simmons

May 7, 2021

The 69th installment of the Truth About Vintage Amps! Once again, amp tech Skip Simmons is fielding your questions on all-things-tube-amp.

Use the discount code TRUTHV150FF to save $15 off Caddis readers

As always, we're also sponsored by Amplified Parts and Grez Guitars

Some of the topics discussed this week: 

3:09 Skip gets his Caddis readers

5:52 Skip's $260 Ampeg Reverberocket 2; vintage mono hi-fi speakers

11:53 Skip's Champ mod, redux; radial caps instead of axial caps

16:37 A Gibson GA-5 reissue with extra stuff between the coupling capacitor and the second stage of the 12AX7

22:32 Wandering Boy Guitars (link)

29:00 Why velcro on the speaker grill cloth? John D. MacDonald's Travis McGee series

35:07 Jason's new podcast: Sweep the Floor (link)

35:42 Presence control versus top cut control

42:10 The Gibson Hawk's one-tube reverb circuit

46:29 Mismatching speaker impedance on a 1959 Gibsonette GA-8; Roald Dahl's 'Kiss Kiss'

51:37 Maximum efficiency speaker mismatching with a Supro 1610RT and a Dr. Z Maz 38 S; washing white rice

55:58 Music recommendations: Blackalicious' "Feel That Way;" Steve Wonder's 'Talking Book,' Sam Plecker's "Mr. Gray Cloud"

1:00:50 Using keyboards and synths with vintage tube amps

1:05:00 All-Clad's factory second website (

1:05:42 What to do with 100v line output transformers in old PA amps

1:09:49 Filter cap values in relation to power transformers; Arnica gel

1:15:44 The three pillars of BBQ sauce;

1:19:25 Bulging caps in a Bogen DB-130 amplifier; La Costena Salsa Taquera

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