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ARC ST70 Restoration - Analog Engineering Associates
http://aeaaudio.com/arc-st70-restoration/
Background. In their early years Audio Research built the ARC ST-70-C3 as a kit for the legendary Dynaco ST-70 and later as a factory mod. They completely did away with the factory Dynaco circuitry in the ST-70, using only the chassis and …
ARCDB
https://www.arcdb.ws/Database/ST70C3/ARC_ST70C3_manual.pdf
Audio Research Corporation ST-70-C3 Super Modification Kit Dynaco Stereo 70 Power Amplifier PRICE S4.W . NOISE L EFT ptop CHA smv p top 120 the Input S egent 830mv 175VDc for 22V Total a b3th POWER BANDWIDTH 25V RMS/'6n 2 ggw Ei +90uoc 90VDc Ei ther ovoc *IC5VDC +260VDc +100VDC +270voc +100VDC FREQ. RESPONSE AT 'WATT
Audio Research (Special Modified Dynakit) ST-70-C3 ...
https://www.audiogon.com/listings/lisaf240-audio-research-special-modified-dynakit-st-70-c3-vintage-tube-amplifier-w-vintage-g-amplifiers
Super cool and rare upgraded Dynakit ST-70 tube amplifier modified by Audio Research. Dynakit sold these tube amplifier kits back in the early 1970's. Back in 1974 you could bring your beloved ST-70 amplifier to Audio Research and for $375 they would hot-rod it to work at its full potential!
ARCDB
https://www.arcdb.ws/ST70C3/ST70C3.html
Description. The ST-70-C3 is a remake of Dynaco Stereo 70 reusing only the chassis and the transformers. The newsletter from July 29 1974 is announcing the release of the ST-70 factory rebuild, but that never actually happened. It was finally released as a kit through Old Colony Sound Lab (Audio Amateur's parts division) in 1977.
AUDIO RESEARCH ST-70-C3 stereo amplifier-RARE | Tube ...
https://www.audiogon.com/listings/tube-audio-research-st-70-c3-stereo-amplifier-rare-2014-03-26-amplifiers-20009-washington-dc
AUDIO RESEARCH ST-70-C3 stereo amplifier-RARE [Expired] Rare classic stereo amplifier by Audio Research. In current use. 35 wpc yet powerful, robust and warm sound on classical music, from soloist to full orchestra. Has been fitted with modern board, new electrolytics, speaker and terminals etc. two pair matched output tubes.
Audio Research ST-70 | Tube | Audiogon
https://www.audiogon.com/listings/lis8i8hh-audio-research-st-70-tube
Audio Research ST-70-C3 . Offered for sale: The Audio Research version of the famed Dynaco Stereo 70. Some history; back in 2004 I purchased this as an unassembled upgrade kit on eBay and then wrote Audio Research asking about modifications and upgrades to the original unit.
Audio Research ST-70 C3 Rare amp for sale | Tube | Audiogon
https://www.audiogon.com/listings/tube-audio-research-st-70-c3-rare-amp-for-sale-2013-04-24-amplifiers-12590
Audio Research ST-70 C3 Rare amp for sale [Expired] no longer for sale. Average. Research Pricing. These rare collectible amps don't come up for sale very often and I haven't seen one in this condition since I bought this one years ago. The chassis and cage are in perfect condition, the pcb has no burn marks on it, this in itself is rare.
The Audio Research versions of the Dynaco ST-70
https://dynacotubeaudio.forumotion.com/t2677-the-audio-research-versions-of-the-dynaco-st-70
Audio Research had 3 versions of the Dynaco ST-70 that they put out during the early '70's - the C1, C2 and C3 (photos of each and a schematic of the C3 below). C1 below > The C1 used a tube rectifier with two OA2 voltage regulator tubes. The driver circuit used SIX driver tubes (three for each channel).
Audio Research – High-end audio equipment
https://audioresearch.com/
Audio Research continues its dedication to unparalleled musical expression and crafting components of the highest quality and lasting value for its customers. Our long-term dedication to service is peerless in this industry (Audio Research, with few exceptions, can repair anything ever produced during its entire history).
The Dynaco ST-70 Series 3 Tube Amplifier is Now (Finally ...
https://www.audioshark.org/amplifiers-8/dynaco-st-70-series-3-tube-amplifier-now-finally-shipping-14307.html
The Dynaco ST-70 Series 3 Tube Amplifier is Now (Finally!) Shipping. Fleetwood Deville by Oswald Mills Audio, Vienna Acoustics Haydn Jubilee, Wharfedale Linton w/ stands, Klipsch RB-75, Klipsch RP-160M. Valvet E3, Job INTegrated. …
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