Dynaco amps

[laxx]

So there's a local guy selling his Dynaco ST-70 for a pretty fair price ($300) and a pair of Magnepan MMG's ($300) also. I was curious if you guys have any input on the Dynaco amps.

[Pars]

The ST-70 has a pretty good reputation, and IIRC was designed by David Hafler. I've never owned one, but did have some Hafler amps before and they were good. As for price, the $300 seems kinda steep for a Dynaco, but I have not looked at pricing on these in a long time. Is it stock, or has it been modified/upgraded? I seem to recall there being some modification kits and parts floating around; I'd take a look on audioasylum to see what you might find out.

[kevin gilmore]

35 watts per channel ultra linear. Modification board from van-alistine used to be

avaiable, may still be available. I remember when these were available new for $75.

[Knuckledragger]

The ST-70 is a storied amp, and rightfully so. From this article:

[David Hafler's] first company's "Dynakits"—preamps and power amplifiers in kit form—were assembled by hundreds of thousands of enthusiasts in the 1950s and '60s, a period when audio was primarily an engineering hobby and most good-sounding gear was built by its owners. Several Dynaco products from the period are still regarded as among the best ever made, including the ST-70, a 35Wpc stereo tube amplifier with a highly efficient push-pull output circuit. The ST-70 was the prototype for most similar designs that followed from other companies. The Dynaco Mk.II, a 50W amplifier, was featured in a media display in the Smithsonian's Museum of American History in Washington in the 1990s. (A detailed history of Dynaco can be seen here.) Hafler sold Dynaco to Tyco in 1968, but stayed on in an advisory capacity until 1971.

[Augsburger]

Welborne Labs

Wellborne Labs has other info and parts I believe and he is getting better at responding to email inquiries.

[n_maher]

I've actually had pretty good luck with Welborne lately, for whatever that's worth.

[Augsburger]

I have always had great experiences with Welbourne,limited as my purchases have been over the years. But I saw a number of posts around somewhere complaining about follow up on orders and all in the past so I thought I would update any info floating out there that my recent experiences have been good.

[zer010gic]

If its an original Dynaco you may need to look at getting it recapped/rebuilt but its worth it. Those Dynaco tube amps sound great. I have looked at doing one of the new kits several times because its a proven design.

You may want to look at

Triode Electronics Inc. Online

tubes4hifi home page

Corey

[Dreadhead]

dude this thread has been dead for over 5 months. Just let it die.