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| Rising Star's VINTAGE Audio Euipment Decade of Accumulation Garage Sale |
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The original version of this page: |
Tube Instrument Amplifiers + Heads |
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| • Tube for the stage • Tube for the small stage or home • PA Amps • Stereo Tube Amps • Effects Processors and Pedals • Recording Equipment • Tube Spring Reverb • • Garage Sale Main Page • | ||
A clean precision all tube amplifier / head for guitar and other instruments |
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| Description: A small power (12W) high efficiency precision amp, aimed at reproducing detail and clarity of an instrument. This was originally an amplifier module from a tube organ that I modified by complete modification. Physically I added a power chord (instead of tits weird original jack), added input and output jacks and a volume and tone control knob (equipped with chicken head knobs) (Remark: tone control was added after the photo was taken and is not shown here). A main fuse was added and a fuse holder Electronically I pulled every capacitor possible and eliminated it or replaced it with European ones. A high capacity Power supply filter cap was added (200 uf), most of the wiring was replaced with low interference wire, Star ground was implemented. Just to mention it: Output tubes are used in triode mode and feedback loop is reduced to absolute minimum. |
The Result: A nicely transparent amp. A bit too noisy for recording at its current state, due to high impedance circuitry, but really clear and present in every detail. Not great for volume, but good for Jazz Guitar, Harp, or Fender Rhodes solo, Synth as solo instrument, etc. etc.. In my latest experiments I added a passive no feedback tone control which is directly bypassed and taken out of the circuit unless the tone control knob is pulled. The level is reduced when on, as the passive circuitry reduces the signal. Adjustment emphasizes bass and reduces highs when fully counterclockwise. It blends smoothly to emphasized highs and reduction in bass. Features: Input jack, Volume control, tone control, active if pulled - passive and out of circuit when pushed, a switching speaker output (switches amp into standby mode when no speaker is connected. this is: Only transformer is on, heater current off, High Voltage off) 12W output power. Tubes: 12AX7, 12AU7, 2 6AQ5, 6X4 Condition: works great! Cosmetics: 9/10, A few holes where original jacks and connectors used to be. |
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| Price: $175.00 | Lot: amplifier fully tubed (all 60s tubes that came in the amp). A 50s Newcomb cabinet with 12" speaker, covered with burgundy tolex is also available for an additional $25. Will not be sold without the amp. Will put up photo as time permits. | |||||
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