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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Kay 704 Vanguard Reviewed

December 23, 2011
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Share This:As a follow-up to a previous post, we just posted a new review for a 1965 Kay Vanguard 704 amplifier. Check it out here! Kay 704 Vanguard with Vibrato

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1960’s Vintage Ads for Kay Electric Guitars & Amps

May 16, 2011
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Share This:Kay Musical Instruments of Chicago was the first company in 1962 to manufacture guitar amps that were 100% solid-state electronics. Here are some vintage advertisements from that time period. The first ad, Transistorized Amplifiers, I found as a JPEG somewhere on the Internet years ago. Unfortunately I can’t remember where I found it, and […]

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Kay 704 Photos Posted

May 15, 2011

Share This:Finally had a chance to upload some photos of the 1965 Kay 704 Vanguard amp we acquired last month! The photos are posted here: Gallery Photos – Kay 704.

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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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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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Roger McGuinn and the Regency TR-1

March 5, 2011

Share This:Long before iPods, CD’s and Walkmans there was the transistor radio. The advent of the transistor radio is integral to the history of rock and roll. The first transistor radio, the American-made Regency TR-1, arrived on the scene in 1954 about one year before the Sony transistor. In this video Roger McGuinn, founding member of The Byrds, tells […]

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