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Emerald Amplifiers

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Radio/Guitar Amplifiers

    Project Videos

    1965 Gibson Skylark GA-5

    A sound sample of the recently restored 1965 Gibson Skylark GA-5 12-watt tube amp.

    The Wasp. 5-Watt Amplifier Conversion

    This 1940’s Firestone radio has been converted into a hand-wired 5-watt tube guitar amplifier. It uses (1) 12AX7 preamp tube, (1) 6V6 output tube, and a 5Y3 rectifier tube. It can be connected to either a 4-ohm or 8-ohm external speaker. It has a volume control that also activates a boost/overdrive channel with a push-pull. It has an adjustable negative feedback loop. The video sample is the WASP played through a Jensen 10 inch speaker. Great tone amp that can be used as a practice amp or recording amp.

    1949 Admiral Radio 5 watt Guitar Amp

     This 1949 Admiral radio has been converted into a Fender Champ-style 5-watt tube guitar amplifier. It’s hand-wired and uses (1) 12AX7preamp tube, (1) 6V6 output tube, and a 5Y3 rectifier tube. It can be connected to either a 4-ohm or 8-ohm external speaker, Speaker Not Included. It has a volume control that also activates a boost/overdrive channel with a push-pull. It has an adjustable negative feedback loop. The video sample is the Admiral Champ played through a Jensen 10-inch speaker. Great tone amp that can be used as a practice amp or recording amp. 

    Service Gallery

    JCM overheating problem fixed

    1965 Gibson GA-5 Project...Complete rebuild in-process..   

    The 1965 Gibson GA-5 Skylark:

    Preamp: a single-12AX7

    Phase inverter: Transformer

    Output Tubes: a pair of 6P14P (6n14n) Russian (same as 6BQ5 and EL84)

    Controls: Loudness, Treble, Bass, off-on


    Back panel of a vintage Emerald Amplifiers model 1947 FC5 "The Wasp" with controls and power cable.

    Repurposed radios...Coming soon


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