Dynaco/Dynakit ST-70 to rebuild

ViperZ

If anyone knows where I can get a rebuildable Dynaco ST-70 or if you have one for sale, please let me know!

I can't afford the new kit at this point in time .

micro74

ViperZ wrote: »

If anyone knows where I can get a rebuildable Dynaco ST-70 or if you have one for sale, please let me know!

I can't afford the new kit at this point in time .

micro74.com@live.com dynaco st70 for sale clean complete
email i will send info and pictures also have pre amp model pas-2

robert

micro74

will send pictures e mail address? i will quote on each or both units
phone call if needed number?

ViperZ

I'll pm you my contact info. I already have ST-70 and (funny) picking PAS-2 tomorrow morning, but I wouldn't mind another ST-70 if the price is right to get 70 Watts per channel of tube goodness.

george daniel

So are the ST 70's 70 watts per channel or 40? I know nothing about them,hence the question.

ViperZ

Hi George, ST-70 is originally 35 Watts per channel (hence 35x2 = 70 RMS total). I saw some upgrades, which would let you put different tubes and up the RMS power to 40 Watts per channel.

We (me and my dad) have just finished rebuilding the ST-70 yesterday. Replaced all electrolytic capacitors, selenium rectifier, can electrolytic capacitor, input and output connectors some parts, which were out of spec, some wires... balanced it again... it sings now!! It's so much better than when I bought it a few months ago - it ain't even funny.
I got a matching PAS2 preamp today. It's mostly upgraded, but needs some upgrading on the phono section, which we started today.

Right now I love the combination of ST-70 with Carver C-1 preamp (even better than with PAS2 in its current condition).

I would love to try to run two ST-70, since these amps are bridgeable (70 Watts RMS ) with my restored Maggies MG-II.

george daniel

Thanks for the input,, I have a friend who has one and he swears by it. His has been modded/upgraded by Tom Tutay and he powers some Spica's with it,he's had many amps come and go but his dynaco remains. I am very intrigued by these amps,,evidently, a few hundred thousand of these were built,,pretty impressive.

mhardy6647

or get a brand-new ST-70 (or, better yet, IMNSHO, ST-35) kit from www.dynakitparts.com and build it yourself from (more or less scratch)...

ViperZ

mhardy6647 wrote: »

or get a brand-new ST-70 (or, better yet, IMNSHO, ST-35) kit from www.dynakitparts.com and build it yourself from (more or less scratch)...

Ummm, did you see the prices on that "brand new" kit?

I got my ST-70 for cheap, spent quite a bit on upgrades and updates (from dynakitparts, lol), and I still paid way less than paying for the new kit.

If you really like to spend your time building, maybe buying a new kit is for new. Personally, I'd rather buy an older amp and restore/upgrade it myself.

Also, what do you mean 'st-35' - did you mean Mark III or Mark IV?

mhardy6647

Their prices are quite reasonable... if you were able to get a vintage ST-70 cheap, that's great. An inexpensive ST-70's eluded me for decades. Restoring a vintage amp is well and good... it's my preferred route, too... but a brand-spanking new one would be pretty nice to have, too!

By "ST-35", I meant the ST-35. push-pull EL84 stereo power amp (nominally 17.5 wpc; realitically probably in the 12 to 14 wpc neighborhood); basically an SCA-35 without the (passive) preamp section and phono preamp. The ST-35 is something of a sleeper... unfortunately, they weren't nearly as popular as the ST-70, so they're not easy to find (and definitely not easy to find inexpensively). I have been thinking about buying the Dynakit part ST-35 kit sans transformers and converting my SCA-35 into an ST-35 someday.


EDIT: I totally missed the comment "can't afford the new kit..." in your original post; sorry!