Solid-State Electronics

Transistors and diodes. Germanium and silicon. Semi-conductors and integrated circuits. Rugged, reliable, cool running, compact and lightweight. These discoveries and developments in electronics changed the world and ushered in the Space Age.

A quote from a 1967 VOX catalog: “A completely new situation emerges today, with the introduction of the SILICON TRANSISTOR. Developed for interplanetary flight, this is truly a space-age component.” Interplanetary flight? Laughable!

1979 Guyatone EX1

January 18, 2015

Share This:Just picked this great dealĀ today at Hum Strum and Drum in Multnomah Village. A vintage 1979 Guyatone EX1 guitar amp. Made in Japan. Solid-state, one channel, 20 watts, 12″ speaker, overdrive and reverb combo. Gain and volume controls, high and low EQ, reverb depth. Normal and overdrive inputs, headphone jack, pilot light. Excellent condition. […]

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eBay: 1966 Vox Viscount V115 Solid-State Amp

June 15, 2014

Share This:Currently on eBay: Vintage 1966 Vox V115 Viscount Super Reverb with Casters Solid State A transistorized version of the AC30? 35-watts RMS; 70-watts Peak Power Three Channels: Normal, Brilliant, Bass Top Boost (just like the AC30) Mid Range Boost (MRB) just like the AC30 Reverb Tremolo Fuzz? (maybe?) 2 x 12 Vox Bulldogs made […]

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Original Schematic Diagram and Parts List for Kay 704

June 3, 2012

Just uploaded and added the original factory diagram and parts list to my full review of the Kay 704 Vanguard amp.

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Video: Kalamazoo Model 1 Combo

November 27, 2011

Share This:New video posted… 1971 Kalamazoo Model 1. Not a bad sounding 5-watt practice amp with a nice 10″ Alnico speaker. This is as simple as pure analog can sound back in the 70’s.

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A Briefcase Full of Blues

March 28, 2011
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The Kay 704 Vanguard with Vibrato was the world’s first all transistor solid-state guitar amp, introduced by Kay Musical Instruments in 1962. Based on traditional tube amp design of that period, the vacuum tubes were replaced in the hand-wired circuits with seven germanium transistors and four diodes.

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Beatles Amp Re-Discovered

March 18, 2011
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Share This:The Vox UL730 amp played by George Harrison on the Revolver and Sgt. Pepper’s recordings The Northwich Guardian reported today that a man in Wicham England discovered that a guitar amplifier he’s owned for awhile actually belonged to George Harrison in the mid-60’s. Apparently that fact went unnoticed for decades until the man took […]

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First Solid-State Guitar Amplifier

March 13, 2011

Share This:1965 Kay Vanguard 704 with Vibrato Lucky me! I was looking for a vintage solid-state combo amp to use at practice, and to give my trusty tube Silvertones a rest. Just scored this one off ebay today for cheap! The very first solid-state guitar amp was introduced by Kay Musical Instruments in 1962. Can’t […]

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