Audio Amplifiers

Product Details:
This one tube amplifier was built by Dan Churchill. The founder of Commercial Radio in Cavendish Vermont.
The transformer in the photo is a plate & filament transformer.

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Crown Laboratory power amplifier. 600 watts into 8 ohms DC to 45 KHz. Mono amplifier. Working condition. 19" x 19" x 9". Manual available online. Originally designed for industrial applications such as shaker tables but work well as audio amplifiers, in particular subwoofer amps. We have 3 on hand at this time and will guarantee them to be functional.

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National stereo class A B audio amp. 68w, 1 channel, 20 - 94v. DC: PM38AS.

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Monolythic linear 12 watt (51 dB gain) module, 4 ohm or 8 ohm output impedance, Vcc: 13.8 vdc nominal. Full specs and curves included with purchase. Kit of support components, add $4.

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Velodyne Servo FSR Series sub-woofer amplifier. Input: 230v @ 50 Hz.

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Velodyne CT Series sub-woofer amplifier. 230v @ 50 Hz only. New, unused.

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Velodyne CT Series sub-woofer amplifier. 230v @ 50 Hz only. New, unused.

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Velodyne CHT-8 Series sub-woofer amplifier. 230v @ 50 Hz only.

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Unisound SW120 powered sub-woofer amplifier. 110v @ 60 Hz.

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Velodyne VLF-1012 Series sub-woofer amplifer only. 230v @ 50 Hz only. 1 available.

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Sanyo power amplifier. Mono. ±57v DC max. 60 watts in 8 ohms with 0.008% distortion. THD = 0.4% max (200w).

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Westinghouse type FG-10 Audio Amplifier - 10 kw. Accepts 600 ohm input signal, 10 mW maximum and produces 10 kw output at impedances from 1.6 ohms up. Frequency response 30 - 10,000 Hz @ ±1.5%. Total harmonic distortion less than 5%. Reduced output available below 30 Hz and up to 20,000 Hz. Multiple tapped output transformer allows a wide range of output impedances.Uses a McIntosh K-1071, 200 watt amplifier as a driver, feeding four (4) WL-5736 triodes with plate dissipation of 2500 watts per tube and maximum DC input power of 4200 watts.Useful for driving vibration testing equipment or other industrial applications. Single channel, not stereo.Another feature of this unit is that it only requires 23 square feet of floor space in a 82-1/2" tall cabinet. Condition of unit is excellent. Probably never used, but 60 years of dust. Manufactured in 1953. Weighs 2,500 lbs. Manual is included. Sold as-is. No warranty expressed or implied.

• Input power: 230 or 460 vac, 3 phase @ 50 Hz or 60 Hz
• Dimensions: 34" x 44" x 82-1/2"H

Product Details:
Monolythic linear 12 watt (51 dB gain) module kit of support components.

Product Details:
Tortran vacuum tube amplifier transformer. Center epoxy potted with 3/8" mount hole. Dual primaries 115v (230v in series) 50/60Hz 740va. Five secondaries 390v C.T. at 1.5 amps, 195v at 0.5 amps, 14.8v at 2 amps, 6.3v at 3.6 amps, 64v at 0.1 amps. 6.1"DIA x 3"H, 14 lbs.

Product Details:
Western Electric audio amp from 20's with three 216A tubes. Filaments good. Photo denestrates glow and rilaments. Socket contacts. 9 3/4 x 12 1/2, 8h with tubes. Black top in excellent condition. EDGES and cabinet need refinished. Base wood excellent condition.

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Crest audio. Output 1400w @ 2 ¦ per channel. 19" rack x 17" deep x 5-1/4"H. 208v input. Used - excellent condition.

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BGW professional power amplifier. Individual front panel detentent gain controls, 25 watts per channel (8 ohms, 20Hz - 20k Hz, 0.10% max THD) 75 watts monaural, front panel headphone jack, easy access stereo/mono switch. Convertible 120v/240v or 100v / 220v AC power. 1-3/4"H x 11-1/2" deep.

Product Details:
This is a premium example of a Western Electric 25B audio amplifier. It is in excellent condition inside & out. Original brass patina intact. Two Western Electric brand 205D. Tubes are in excellent condition. AC cord is excellent. This specimen had been in a collection most of its life. Made in 1920's it is over 100 years old. We have not operated this piece so the over all function is unknown.