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Dynaco ST70 OPTs | Audiokarma Home Audio Stereo Discussion ...
https://audiokarma.org/forums/index.php?threads/dynaco-st70-opts.985954/
18,593. Location: northern cal. If I remember right when building my ST-70, the feedback circuit was tied into the 16 ohm tap. So it will take a bit of math to figure it out for the 8 ohm tap on the new OPT's. Lavane, Wednesday at 1:30 PM.
Dynaco ST-70 | Audiokarma Home Audio Stereo Discussion Forums
https://audiokarma.org/forums/index.php?threads/dynaco-st-70.27355/
For the heck of it you could use a 5U4 tube in the ST-70. Uses 5 watts more for the filament, and will drop some B+, but is okay to use. I have no idea if you'd hear a drop in sonic performance, but easy to find out. tubino, Nov 27, 2004. #4.
Dynaco ST70 Blowing Fuses | Audiokarma Home Audio …
https://audiokarma.org/forums/index.php?threads/dynaco-st70-blowing-fuses.186054/
The power transformer in the ST-70 can handle a 5U4 tube (3 amp filament) so using a 5R4 with the additional 1/10th of a amp for the filament won't hurt it. Using the 5R4 will cause the B+ to be a little lower, I don't have the output current ratings on hand but that may be an issue if it is less than the 5AR4.
Dynaco ST-70: A Timeless Classic - Audiophile Nirvana
https://www.audiophilenirvana.com/audiophile-equipment-reviews/dynaco-st-70-timeless-classic/
Dynaco is best remembered for its highly regarded vacuum tube stereo amplifier, the Stereo 70 (ST-70). Introduced in 1959, the ST-70 was available as a kit (Dynakit) intended for assembly by the purchaser or as a complete factory-wired unit (Dynaco).
Refurbish a Dynaco St70 - Audiogon Discussion Forum
https://forum.audiogon.com/discussions/refurbish-a-dynaco-st70
A properly-working ST-70 is actually a respectable amplifier. They have distortion figures that gave their competition conniptions back in the day (Hafler was an excellent designer) and so rival much more revered amps like the Marantz 7B.
Will Vincent Dynaco ST 70 - Talkin' Tubes - The Klipsch ...
https://community.klipsch.com/index.php?/topic/175165-will-vincent-dynaco-st-70/
New to this Forum but would appreciate some feedback on anyones experience with the Dynaco ST 70's. More specifically the ones modified by Will Vincent. Talked to him for a bit this weekend. A very interesting man and his mods look quite impressive. My wife really likes the mid century look of hi...
ST-70 Baseline2 - Audio Regenesis
http://audioregenesis.com/documents/ST-70%20Base%20Line%20Testing.pdf
The Dynaco ST-70 surely must represent the greatest amplification paradox of all time: It was arguably the best selling power amplifier of all time, and is arguably the most maligned such device as well. For a generation who adored it, there have been those in following generations who are quite vocal about it, to the point that the only
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