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VAC Vintage Williamson

STATUS - SOLD
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Description :
The VAC Vintage Williamson tube power amplifier is a single chassis wide-band low-feedback stereo amplifier conservatively rated at 35W per channel. The basic Williamson design was first published in England in 1947, and was the mainstay of the original high fidelity movement. Notable features of this circuit include: direct-coupled input amplifier and phase splitter resulting in low phase shift, inherent precise balance of the phase splitter at all frequencies and level, resulting in excellent push-pull balance and a low distortion and a unique bias/balance circuit that allows monitoring and precise adjustment of the output tubes for maximum power, minimum distortion and natural sound. In the refined form presented in this VAC, the circuit delivers true state-of-the-art performance, and repudiates the more complex designs seen even to this day. The output stage features independent cathode bias for each tube, which results in excellent sound and the most stable and maintenance free operation available anywhere. Premium parts are employed throughout, including 14 pound 22 section bifilar-wound ultra- wideband output transformers, polypropylene and polystyrene signal capacitors, high current rectifiers, low ESR power supply, and proprietary wiring. The quality of parts and careful layout allows the use of very little feedback for high sonic purity and low distortion.

Specifications :
Power Output...........................................37W/C
Frequency Response................................down 0.5dB at 6Hz and 55kHz
Distortion................................................ less than 0.2% THD at 1kHz 10W
S/N Ratio.................................................more than 84dB
Sensitivity................................................0.8V input for full power output
Negative Feedback...................................Loop feedback is fixed approximately at 8dB regardless of output tap selected
Absolute Polarity......................................Does not invert signal polarity
Fuse.......................................................Slo-Blow type, 3.15A for 100V and 200V configuration
Weight....................................................20kg
Dimensions(w x d x h)..............................46 x 36 x 16cm

Miscellaneous :
Made in...................................................USA
Condition.................................................8/10 (Decent Condition)

Product Information :
http://www.vac-amps.com/Manual_V35-35.pdf

 

 
 
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