Dynaco ST-70Dynaco  ST-70 Restored, Upgraded, Stunning!Here is a beautiful Dynaco ST-70 power amp. One of the most popular amps of all time, over 300,000 of them were sold. I have restored over 100 of these wonderful old jewels, and this one is my ow...799.00

Dynaco ST-70 Restored, Upgraded, Stunning! [Expired]


no longer for sale

Here is a beautiful Dynaco ST-70 power amp. One of the most popular amps of all time, over 300,000 of them were sold. I have restored over 100 of these wonderful old jewels, and this one is my own personal ST-70. I've had to scale back my restoration hobby as my wife is battling cancer. Moreover, my son is going on a mission trip to Rwanda, Africa this summer and so I have been selling much of my own personal gear to help fund the cost of that endeavor. So the buyer of this amp will have the satisfaction of not only owning a terrific amplifier, but will be supporting a wonderful cause as well. Ok, as for this ST-70, it was stripped, sanded, primed and painted; new tube sockets, new RCA's and binding posts installed. Power supply filtering was doubled; a new driver and bias setup - the VTA was used in place of the anemic 7199 circuit. I have experimented with all of the driver circuit mods out there - Van Alstine, SDS, Welborne, etc., and the VTA simply blows them all away by a country mile. It brings this amp to a whole new level, with a much more powerful bass, a warmer midrange, and a silky smooth high end. It has the original Dyna cloth lead transformers of course. The amp runs dead quiet and sounds simply amazing. Tubes are three Telefunken 12au7's, in the driver section, four NOS Groove Tube (9's)outputs and a Sylvania Fat Bottle 5ar4 rectifier. The amp looks terrific and wife approval should be no problem. Hate to part with this, but other things just take priority right now.
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cjkinpa 

Last 12 months
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Member since January 2006

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