2. amps-preamps
  3. 1421954293

Refurbish a Dynaco St70

This is my 2nd attempt at getting this thread started. 1st attempt never posted. Please forgive should a duplicate arise.

I have a Dynaco ST-70 that has been in storage for several years and has few hours on it. I would like to have it refurbished and updated for electrical components, inputs, and outputs. After having searched this forum I thought it might serve me best to initiate a new thread. Looking for contacts for having this done. Thanks in advance for your suggestions. Mike
mesch
rodman99999
6,131 posts
 
"Pry- I meant with modifying Dynacos, not where he lived. :)" Actually: Mr Johnson began a company known as Electronic Industries, in Minneapolis, Mn, in 1951. He was building some amps back then. Another company assumed ownership, but- he stayed on as Research Director. He didn't start modding ST-70's until the late 60's. Started ARC, in 1970.
whart's avatar
whart
3,037 posts
 
Rodman, thanks for the additional, and corrected info. I remember Pelpoe Industries as well. My point was that modding that amp has some serious cred behind it, and if memory serves, some of the earliest ARC offerings were based on Dyna mods.
rodman99999
6,131 posts
 
YEP! ARC's first FM tuner was based on the Dynaco FM-3. The M-60 MkIII C3 amp was a redesign of the Dynaco MkIII. ARC offered kits, to remake the ST-70, using only the chassis and transformers. Imagine what we'd have had, back then, if Hafler and Johnson had formed a company. But, HEY- over 350,000 STOCK ST-70s were sold, making it the most popular tube amp ever. Hafler's design wasn't too shabby, on it's own merit(what an understatement)!
atmasphere's avatar
atmasphere
11,803 posts
 
ARC was a spin-off of Electronic Industries. EI is still in business today, but has switched over to making circuit boards.
hifigeek1
770 posts
 
And before Electronic Industries, Bill Johnson's company was known as Peplo. I don't know why or the significance of the name.
More to discover