Is it risky to use the KT120 tubes in my VTA 70 with upgraded transformer?
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Bob Latino wrote:
Mike Matthews of New Sensor has just announced that they will soon be carrying the new Tungsol KT120 tube. The tube is not as yet on their web site but a description of the tube sent to me by New Sensor is below. This tube is plug compatible with a KT88 or 6550 tube. They released some dealer prices to me but figure a retail price in the $45 price range per tube. (Retail prices are now posted on the New Sensor web site with a mid May delivery date)
[i]"March 25, 2010
This tube should work fine in any Dynaco Mark III or VTA ST-120. It could also be used with any Dynaco ST-70 or Mark IV as long as you have an upgraded power transformer.
Specifications for this tube > http://www.newsensor.com/releases/KT120TungSol.pdf
Curves for this tube > http://www.newsensor.com/releases/KT120TungSol-Curves.pdf
Bob Latino wrote:David,
I have had one customer use the Tung-Sol KT150 output tubes in a VTA ST-120. He reported that they worked fine and sounded good biased like a KT88. IMHO they will probably offer nothing more in sound quality over the Tung-Sol KT120. They also cost about double the price of KT120 tubes ($90 to $100 for EACH KT150) ..