Legendary Dynaco ST70 Has Been Relaunched

  • Thread starter Thread starter mauidan
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That is great news. I watched my brother build these amps on the kitchen table when I was a little tyke.

Any idea on cost?
 
Thanks Dan. Looking forward to seeing more about this amp. I could not find a website or any pricing information.
 
I never built a Dynaco but I did many Hafler amplifiers and pre-amplifiers a long while back. Very nice sounding equipment and a lot of pride in building your own. I know I always took my time in channeling the wiring to make sure that the amps looked good with the tops off also. Always wanted to build a glass cover for the amps :)....
 
Will be interesting if Dick Olsher or another reviewer who has had or still has the Ultravalve in house compares the two. Especially if Dynaco can prices theirs in Frank's general ballpark. I have been on the lookout for a used Ultravalve for a while just out of curiousity.
 
Jack said:
Will be interesting if Dick Olsher or another reviewer who has had or still has the Ultravalve in house compares the two. Especially if Dynaco can prices theirs in Frank's general ballpark. I have been on the lookout for a used Ultravalve for a while just out of curiousity.
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I am curious too. Looks like the new reissue could be a winner.
 
Franks has been working on and modding this amp for decades so it will be interesting to see what the "new guys' come up with and what resemblance it has if any to one of Frank's.
 
Jack said:
Franks has been working on and modding this amp for decades so it will be interesting to see what the "new guys' come up with and what resemblance it has if any to one of Frank's.
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The "new guys" are using solid state regulation, a user friendly tube bias function and better quality caps.

It took years, just to get uncle Frank to put IEC inputs on his products instead of captive PCs.
 
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At what point is the amp no longer an ST-70?? The original designers are dead and obviously have nothing to do with the reissue. The original circuit is no longer used. No 7199 tube driving a real pair of Mullard EL-34s through the original cloth lead Dynaco output transformers. No GZ-34 rectifier, now it's SS rectification. This doesn't mean the reissue won't sound good, but it's not a Dynaco ST-70.
 
I agree Mark. It's like the guy with 500,000 miles on his car. Everything has been replaced 8 times, but he's still driving the "same" car.
 
If it's slightly sweet and tubey, count me in. I'll give it a shot.
 
Joe

With the SS state instead of tube rectification and a different set of tubes involved, would be kind of hard to sound like the original. Frank's latest version has not been described as "sweet and tubey" that I've seen. That's why I have been waiting to find one used. Hopefully that $2500 price tag is in Canadian as that would be the companies native currency.
 
If you get to hear either one, please let me know how it sounds.

My JBL's seem to thrive on 30wpc and up and I would not mind playing around with a fun and easy to maintain tube amp with sweet mids.


Jack said:
Joe

With the SS state instead of tube rectification and a different set of tubes involved, would be kind of hard to sound like the original. Frank's latest version has not been described as "sweet and tubey" that I've seen. That's why I have been waiting to find one used. Hopefully that $2500 price tag is in Canadian as that would be the companies native currency.
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mep said:
At what point is the amp no longer an ST-70?? The original designers are dead and obviously have nothing to do with the reissue. The original circuit is no longer used. No 7199 tube driving a real pair of Mullard EL-34s through the original cloth lead Dynaco output transformers. No GZ-34 rectifier, now it's SS rectification. This doesn't mean the reissue won't sound good, but it's not a Dynaco ST-70.
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Mark.......The first Dynaco ST-70 wasn't called a Dynaco ST-70 Series 3. I'm guessing this one just might be a different amp, you think? The original wasn't that big a deal and the tube rectifier was trouble prone. I have listened to many ST-70's through the years, stock and modded, hooked up to a bunch of JBL, and Advent speakers. It's real claim to fame, it was cheap and every music loving hippie could afford one without giving up his weekly doobie stash. This amp was modified to death by practically anyone with soldering iron skills and every mod was claimed to be revolutionary.

I'm going to wait and see what this "new" ST-70 Series 3 has to offer. The boys who developed it are not beginners or the garage mod gang. The new preamp and power amp may surprise us all at what is certainly an attractive entry level price.
 
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