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The Truth About Vintage Amps with Skip Simmons

Oct 8, 2021

It's the 80th episode of the Truth About Vintage Amps Podcast: reverb, goats, pickles from Australia and special call-in guest Sam Mollica!

Hosted by amp tech Skip Simmons.

This week's episode is sponsored by Jupiter Condenser Co.Amplified Parts and Grez Guitars

Some of the topics discussed this week: 

1:32: Skip says thanks, Woodinville Straight Bourbon Whiskey

2:44 John Bachigaluppi of Tape Op magazine

4:37 TAVA t-shirts! Pre-order yours here

5:33 Jupiter Condenser Co. discount: Use the discount code TAVA to get free domestic shipping on Jupiter speakers at!

7:03 Our listeners are amazing: Shawn's 3mg Filmosound resistor, Oystein gets a PA amp, Robert Knetzger's pencil resistor (YouTube link)

8:51 Hum on a modded 1979 Fender Musicmaster Bass amp

12:38 Getting more headroom out of a Silverface Fender Twin

18:02 A goat mule in a minivan

23:54 A speaker-driven reverb on a single, Champ-style amp

28:31 Pickled zucchini

32:32 A 1978 Fender Champ that runs too hot (Australian / import version); new tubes, DC voltages

40:36 An Australian amp tech chimes in

44:55 Dumble's Tweedle Dee circuit (5E3 variations); GZ34 rectifier tubes

50:56 Call-in guest: Sam Mollica (; the 12AX7 in Fender standalone 6G15 reverb units; the dry signal in an Ampeg Reverberocket

1:04:10 Output jacks on Gibson Falcons versus modern methods; speaker-driven line out revisited 

1:10:09 A '67 Fender Pro Reverb with a cracked screen grid resistor 
1:13:40 Converting a Conn Strobotuner into an effectless Princeton; pentode pre-amp tubes (5879 tubes)
1:19:11 How to replace the speaker and move the output transformer on a Kay Model 503A; cleaning typewriters 
1:27:48 A Silvertone Twin Twelve 1484 with a steady hum
1:31:54 Standalone reverb/trem unit projects; Gibson 1RVT 

Co-hosted by the Fretboard Journal's Jason Verlinde.

Email or send us a voice memo to: or leave us a voicemail or text at 509-557-0848. And don't forget to share the show with friends.