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Valve amplifier Dynaco ST70 rebuilt ,upgraded

R 20,000

3 days ago62 views
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General Details
For Sale By:Owner
Condition:Used
Description

This amplifier , beautifully built by Cape Town EE John Gilmore is based on the famous Dynaco ST70 . John designed the top plate as per the Dynaco ST70 layout . Output transformers are the Dynaco A-470 (as in ST70). Tests performed at Emil yesterday , these offer incredible performance , -1dB @ 20hz to 0dB @ 30khz frequency response . Power transformers are upgraded double stack made for ST70 , offering much more power than the original . The amp tests for an incredibly low (for valve amplifiers) 0.4% at full power output . Distortion will then be much lower at reasonable listening levels . THD vs frequency tests virtually flat from 20hz to 30khz .

SDS labs psu board under the hood is a huge improvement on standard ST70 PSU setup , offering better smoothing and more capacitance .

Id Subtitle 1351092740
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Ari Marinos
Selling for 17+ years
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