Vintage Tube Amp

Vintage 2A3 Electronic Tube Two – Vacuum Tube Dual Triode Audio Amplifier Radio. The operation has been checked before the sale! It is a used item and has some scratches and stains. Please check the pictures! Please check the pictures. Customer service and satisfaction are very important to us. Return is allowed when the condition does not match with description. Please keep in your mind that we take pictures of all the item’s details to avoid any problem. International Buyers – Please Note. Thank you for your understanding.

I WOULD NOT TOUCH THIS ONE OTHER THAN A LITTLE POLISHING. IT SHOULD BE A FUN EASY RESTORATION THOUGH. THE PLUG CONNECTOR HOWEVER IS THERE AND EASY TO REWIRE (THESE ARE ALMOST ALWAYS MISSING).

VINTAGE CHALLENGER AUDIO TUBE AMPLIFIER CHA20 very rare amp. This came from a local estate and I do not know anything about it. It appears in good condition, I would assume it may need some tubes or a possible rebuild. Feel free to ask any questions you may have.

Low noise RF amplification at VHF. New in Box (NOS).

For sale is an Audio Research Dual 75A factory upgraded from a Dual 51 Chassis. This upgrade must have been done back in the 70s as the tubes are all US made, not USSR/Russia like in most ARC gear. The cost of these tubes alone would be likely half the total cost of the amplifier if you were to replace them.

Since the late 1950′s, engineers at Audio Research have been aware of these problems. To achieve low distortion under the dynamics of music, Audio Research has investigated many approaches to amplifier design, including the conventional bipolar transistor, FET, V-FET, Class D (switching), tube and various combinations of each.

No other accessories included. Both units are in similar condition.

No other accessories included. Both units are in similar condition.

New in Box (NOS).

Vacuum tubes used: 12AX7: 4, 12AU7: 4. Input sensitivity: Phono MM: 2mV, Phono MC: 0.2mV. The appearance has small scratches, dullness, dirt, etc. Due to normal use. Distortion rate: 0.05% or less.