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dynaco st-70

  1. S

    TUNERSYS WS161: When an Internet Radio Finally Grew Its Own Voice

    TUNERSYS WS161: When an Internet Radio Finally Grew Its Own Voice I'm done. For the last few years, my little basement listening nook has turned into a graveyard of good intentions. A drawer full of Bluetooth dongles that squashed Nina Simone's upper register into fizzy digital confetti. A...
    • Sam_Whatart
    • Thread
    • album art free zone class d amplifier dynaco st-70 internet radio linear power supply long-term review network streamer rogers ls3/5a skytune tunersys ws161
    • Replies: 23
    • Forum: Tuners
  2. J

    THE Show (Total Hifi Experience) The Vintage Lounge

    The Vintage Lounge Steals the Spotlight at T.H.E. Show Las Vegas By James Plumb & Wayne Carter At this year’s T.H.E. Show in Las Vegas, where cutting‑edge audio technology dominated the halls, one room stood apart by looking back. The Vintage Lounge, curated by James Plumb and Wayne Carter...
  3. jsg1469

    Dynaco ST-70 bias resistors

    My 1962 stereo 70 is all original with the exception of recently replacing the circuit board (stayed with original 7199 circuit) the selenium rectifier to a 1N4007 and the two bias filter caps to 100uF 100v. My right bias pot is loose and not stable. My meter is all over the place if I touch...
  4. jefferylhenr

    Dynakit ST70 - No Output - No Bias

    I have repaired and restored just about everything under the sun solid state but have minimal exposure to tubes. I did have a set of Dynaco ST-70’s and PAS preamp in the 80’s but other than setting the bias it was trouble free. Fast forward to today and this one has no sound out right or left...
  5. codyrogers

    Need Help Making My Tube Amp "Family Friendly"

    Hey everyone! I tried searching the forum to see if anyone ever had my issue before but I really couldn't find a post that matched it exactly. I decided to post here in hopes someone may have an answer. Right now, my family television goes through my hifi system. My wife and family uses it with...
    • codyrogers
    • Thread
    • dynaco st-70 home theater mcintosh 6200 tube amp
    • Replies: 12
    • Forum: Tube Audio
  6. Nervous_Dude

    Can Dynaco ST-70 power ADS L710s?

    I'm currently shopping for my first nice receiver/amplifier and want to match it with a pair of ADS L710 speakers (89db, 4ohm) for phono, cassette, and tuner functions (not too interested in running anything else through them). A number of people have recommended a Dynaco ST-70 and I've found...
  7. Strgazr1967

    Welborne ST-70 has arrived w pics

    I just got back from picking it up. The owner had his younger son there. A little arrogant guy with an obvious Napoleon issue lol. Settled above what we talked about as I guess the son did a little research. It’s fine. It’s mine and it appears to be in damn near mint condition. Have to manual...
  8. Strgazr1967

    ST-70 ident. Never saw this before.....

    I have a chance to grab this ST-70 but was curious what mod has been done. I’ve never seen one w 4 tubes on the board. Waiting for an answer from the seller. Says it sounds amazing, all new tubes and will demo. Any thoughts? Thanks! Bobby
  9. H

    Dynaco Dynakit St-70 rebuild thread

    starting a thread to document an st-70 rebuild. I welcome all comments and advice. The intent is to generally refurb the unit to as close to stock as is cost effective and durable—I have read through the Gillespie baseline article and will most likely switch to SS rectifier per his...
  10. J

    Dynakit ST70 Complete restoration Project

    This is the beginning of what is the second phase of a greater project going back several years, that being the initial salvaging of this amplifier after being found stored in a Florida attic for over 40 years. For this effort a complete video series exists where the amplifier was brought to a...
    • JRUBIN
    • Thread
    • dyna dynaco dynaco st-70 dynakit st70 restoration st-70 st70
    • Replies: 15
    • Forum: Tube Audio
  11. BrianC7927

    Dynaco St-70 Voltage Question

    Hi All, First post and kinda new to tube audio so forgive any ignorance. I purchased about 6 months ago an original Dynaco St-70 amp, not the new ones but an early 60s model. Been enjoying it and it's all be working great, i have a Scott Type 130 pre-amp that it is plugged into. Just...
    • BrianC7927
    • Thread
    • dynaco st-70 potentiometer tube amp voltage
    • Replies: 8
    • Forum: Tube Audio
  12. Ron13a

    Has Anyone Tried the Sophia Electric EL34-ST Tubes on a Dynaco ST-70?

    The reviewer makes them sound like they'd be an improvement over my Soviet tubes. There's a nice article on them here: https://positive-feedback.com/audio-discourse/sexy-blue-tubes-the-sophia-electric-el34-st-and-aqua-274b-vacuum-tubes/ Anyone used these?
    • Ron13a
    • Thread
    • dynaco st-70 el34 sophia electric
    • Replies: 5
    • Forum: Tube Audio
  13. V

    Question about Dynaco ST-70 Original Tubes

    Hi, I'm new to audiokarma but have read a few articles related to vintage speakers and vintage Sansui amplifier. Recently, I pick up a used Dynaco ST-70. The seller claimed that he is the original owner and included the manual. Once I got home and take a closer look at the tubes, I notice the...
    • vtth
    • Thread
    • dynaco st-70 el34
    • Replies: 27
    • Forum: Tube Audio
  14. hogwylde09

    Dynaco ST-70 with Triode USA driver board problem

    I have upgraded one of my ST-70 with the Triode USA EF86 board. First mistake! The Triode page says it comes with 20 page installation manual LIES! No manual with board and parts. I now know I should have used the Tubes4hifi high gain 12AU7 board. There is tons of info and Bob Latino gets...
  15. BassKulcha

    Is five months a normal time to wait for tube amp restoration? (Analog Engineering Associates)

    It's going on almost five months waiting on a fairly straightforward restoration (not modification) of an ST-70 from a reputable & well-regarded tech outfit. I do understand that good work takes time, and I definitely don't want to be overly impatient, but is five months (and counting—) a normal...
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