lwhaples Posted November 20, 2005 Share Posted November 20, 2005 The new to me MK III's are here, so up for sale is a ST70 Dynaco amp. Rebuilt by Craig with just over a month of run time. Just enough to burn in the tubes. I bought this from a Forum member only because my ST 70 choked a power transformer.Sweet amp! Just no need for it.Price is $550.00 plus shipping. Craig can give the details. Hope the links work. Larry http://www.handquilt.com/larry/IMG_0565.jpg http://www.handquilt.com/larry/IMG_0566.jpg http://www.handquilt.com/larry/IMG_0567.jpg Quote Link to comment Share on other sites More sharing options...
Speedball Posted November 21, 2005 Share Posted November 21, 2005 Nice pictures..... Wish I were in the position to continue swapping gear again, I'd like to hear them with my Rf7's. Quote Link to comment Share on other sites More sharing options...
travisc Posted November 21, 2005 Share Posted November 21, 2005 sweet deal gentlemen!! Thats now $150 off the original price. Quote Link to comment Share on other sites More sharing options...
NOSValves Posted November 21, 2005 Share Posted November 21, 2005 Yup this is indeed a very good deal on a completely rebuilt and modified ST70. I used Roy's at tube4hifi.com front end board and reworked the design to utilize 12AU7's rather then 12AT7's. With the amp using the stock configuration of 12AT7's is just too darn sensitive at 1/2 volt to full power IMHO. I set it up for 1V to full power. Then it has all my standard fare in the rest of the amplifier beefed up power supply and full bias control with test points up front for easy access. Of course new gold RCA jacks mounted slightly further apart to allow larger barrelled interconnects then stock. All this without a single hole drilled in the chassis. This package alone retails out at $450+. This amp cosmetically was a real nice condition. Craig Quote Link to comment Share on other sites More sharing options...
lwhaples Posted November 21, 2005 Author Share Posted November 21, 2005 Thanks for the kind words, selling this will get me a step closer to a third channel set up. Larry Quote Link to comment Share on other sites More sharing options...
lwhaples Posted November 24, 2005 Author Share Posted November 24, 2005 If there's any intrest, I'll eat the shipping. Larry Quote Link to comment Share on other sites More sharing options...
lwhaples Posted November 30, 2005 Author Share Posted November 30, 2005 bump Quote Link to comment Share on other sites More sharing options...
paul cbc Posted November 30, 2005 Share Posted November 30, 2005 Nice deal for someone![H] Quote Link to comment Share on other sites More sharing options...
crazytubepower Posted November 30, 2005 Share Posted November 30, 2005 wish i could do it....!!! Quote Link to comment Share on other sites More sharing options...
Eboz Posted December 1, 2005 Share Posted December 1, 2005 I'm very interested in this amp. I couldn't get the pictures you linked to load though. I'd like to know more about the rebuild and how I can expect it to sound in my system. I use Bob Brines FT-1600 speakers (Fostex 167E MLTL), passive preamp, modded Art DI/O DAC, Nad 521i CDP. My amp is currently a Bryston 3BST and its very revealing and gives the system too much edginess. I'm hoping that the ST70 could relax things. Quote Link to comment Share on other sites More sharing options...
lwhaples Posted December 1, 2005 Author Share Posted December 1, 2005 Eboz, Welcome to the Forum! And Thanks for the intrest in the amp. I really can't say if it will work better with what you have.I bought it when my other died,and I didn't want to be without sound.I tried the links and they worked for me. If you want I can send pics direct. Larry Quote Link to comment Share on other sites More sharing options...
NOSValves Posted December 1, 2005 Share Posted December 1, 2005 Here are the other pictures Quote Link to comment Share on other sites More sharing options...
lwhaples Posted December 1, 2005 Author Share Posted December 1, 2005 Thanks Craig! Better you than me,I can't do more than type without the wifes help. Larry Quote Link to comment Share on other sites More sharing options...
Eboz Posted December 1, 2005 Share Posted December 1, 2005 Thanks for the welcome. I am mostly interested in what are used for the coupling caps, the condition of the transformers and the power cable. Is the chassis now safety grounded? Quote Link to comment Share on other sites More sharing options...
lwhaples Posted December 2, 2005 Author Share Posted December 2, 2005 Eboz, The cord is the original two prong. Maybe Craig can chime in on the other questions.Sorry I'm not much help. Larry Quote Link to comment Share on other sites More sharing options...
NOSValves Posted December 2, 2005 Share Posted December 2, 2005 Thanks for the welcome. I am mostly interested in what are used for the coupling caps, the condition of the transformers and the power cable. Is the chassis now safety grounded? The coupling caps are .33uf @ 600V Russian Mil spec films, The power cord is original, the transformer are original Dynaco cloth leads if I remember correctly. Larry why don't you take a under chassis shot for him. Craig Quote Link to comment Share on other sites More sharing options...
Piranha Posted December 2, 2005 Share Posted December 2, 2005 I see Van Halen II in the background. No wonder you wanted Mark III's. [] Quote Link to comment Share on other sites More sharing options...
lwhaples Posted December 2, 2005 Author Share Posted December 2, 2005 Piranha, You got me on the Van Halen. Good eye sight! Larry Quote Link to comment Share on other sites More sharing options...
Eboz Posted December 2, 2005 Share Posted December 2, 2005 I would like to see an under chassis shot, but I'm ready to buy this amp from you. I've read a lot of good things about Craig's work and could probably help me out if I had any problems with it. Quote Link to comment Share on other sites More sharing options...
lwhaples Posted December 2, 2005 Author Share Posted December 2, 2005 Eboz, Here's a link http://www.handquilt.com/larry/bottom/ cut and paste and it should work. Larry Quote Link to comment Share on other sites More sharing options...
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