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dynaco

  1. K

    Dynaco SCA-35 value

    D Years ago I got a Dynaco SCA-35 for a good deal because it was in rough shape. I replaced all the PC boards with new components and replaced the filter caps and also replaced the output tubes with a matched quad pair. After all that I still did not like the sound. I think it just doesn’t...
  2. caferacer59

    just curious ....

    Bought a PAS 3, worked great for about a week of heavy use, now I lose one channel about 80% gone after about an hour of play time, just slowly disappears. Any thoughts, with work I haven't even opened it up yet, but i did have time to write this lazy email.
  3. S

    Dynaco Mark III Removing Preamp Power

    Hey everyone, I’m attempting to assemble a set of Mark IIIs and want to skip installing the front octal socket and leave only bias test jacks. Is it as simple as ignoring anything that leads to the octal socket and leaving only one connection point plus a ground point to probe for bias...
  4. D

    Tube Preamp please help me choose

    Hi Everyone, Still new here and learning, the help from this site has been amazing! I am trying to choose between 3 Preamplifiers and could use some help again. My power amp's are original Dynaco MK3 monoblocks unmodded and speakers are Wilson Audio Watt2 puppy 3's. I use a Pro-Ject Pre Box...
    • DenverJW
    • Thread
    • dynaco dynaco mk3 mc225 mcintosh preamp preamplifier tube wilson audio
    • Replies: 18
    • Forum: Tube Audio
  5. onwardjames

    Dynaco A25 restoration complete

    Hello everybody! Back 5 years or so ago, @Pio1980 was kind enough to send a pair of Dynaco A25's my way, free of charge. He's like that, lol. Props, bro. They had a bad tweeter, and both woofers were suffering from very saggy spiders. So they had to sit for some time. 2 weeks ago, I...
  6. C

    Comparison: Pioneer HPM-100 vs. Dynaco A25 with Marantz 2230

    Currently have Dynaco A25's with my Marantz 2230, they sound great but i'd like a little more volume/bass clarity. I am curious if the HPM-100 would work well with the 2230, or if they will harm the receiver?
    • codyhale
    • Thread
    • 2230 a25 dynaco hpm100 marantz pioneer
    • Replies: 12
    • Forum: Speakers
  7. D

    Ok, Does this Dynaco MK 3 work with Wilson Audio Watt 3 / Puppy 2 ?

    First off thank you to everyone for helping a newbie many times, this site is amazing! I am looking for a high current tube amp or integrated for my Wilson Audio Watt 3 / Puppy 2's. Under $2K and thinking about pulling the trigger on a set of Dynaco MK 3's at 60 WPC. I have no idea if the...
  8. J

    Dynaco ST70 Abbreviated Restoration video

    Here is the non-technical artistic version of the ST-70 amplifier restoration video for all to enjoy edited from the several full length videos that made up the original restoration. I make several of such videos a year for larger projects.
    • JRUBIN
    • Thread
    • dyna dynaco restoration st70
    • Replies: 0
    • Forum: Tube Audio
  9. jerdobi

    Looking for Dynaco C-100 PC-49 Board Picture

    I'm working on a C-100 and need a really good high resolution photo of the resistors laid out on the PC-49 board to determine all of their values. I've seen the systematic on the internet and it's not accurate and need to see the color codes on each of these resistors. If you have a working...
    • jerdobi
    • Thread
    • c-100 capacitor bank dynaco pc-49
    • Replies: 1
    • Forum: Solid State
  10. Strgazr1967

    Van Alstine Super PAS3 questions....

    I am now the proud owner of a mint VA Super PAS3. It is in near mint condition. I have this currently paired with my ST-70 with the Welborne mods. I am sofar pleased with everything about it except for what seems to be a lack of bottom end to it and I'm wondering if this is due to the tube...
  11. G

    Driving AR3a’s With Dynaco ST-70

    Hey. Just wanted to get some insight on driving my AR3a’s with my Dynaco ST-70. I looked up specs on AR3a’s and saw that they are rated at 4ohms, but my repair guy says he always runs them at 8ohms. Can the speakers handle an 8ohm current? Is there a benefit to using the 8ohm tap with 4ohm...
    • GR3GRS
    • Thread
    • acoustic research ar3a dynaco ohms speakers st-70
    • Replies: 7
    • Forum: Speakers
  12. K

    Dynaco FM-5 Front-end Question

    Hi everyone, Could anyone tell me the identity of the FETs that are used in the Dynaco FM-5 RF front end? Thanks, Keith
    • kpmadden
    • Thread
    • dynaco fet fm-5 fm5 front end
    • Replies: 2
    • Forum: Tuners
  13. G

    PAS-2 Weak Left Channel Help

    Hello. I just got my first tube system set up. The left channel seems to be playing at a lower volume during phono playback. I have to turn the gain down pretty significantly on the right channel of my ST-70 to compensate. In turn I have to increase the volume on my PAS-2 to about the 1o’clock...
    • GR3GRS
    • Thread
    • dynaco dynakit pas-2 st 70
    • Replies: 59
    • Forum: Tube Audio
  14. Zack Sainz

    Vintage AVR And Vintage Speakers

    Hey Fam! I have a crazy late night idea for a small room. Currently I have a Sonos set up, I’m thinking about replacing the Sonos with some older tech such as a Denon AVR-2807 My idea, older AVR with pass through to go into my stereo amp, left and right channels that way I can listen to a...
  15. OldSubSailor

    Trying to ID a transformer

    I was working though a tote of HV transformers I've had around for a while and came across one that, per the note I'd taped to it years ago, was removed from an old HAM transceiver. It's a large, heavy beast whose leads are typical for a power supply transformer . On the case are the numbers...
    • OldSubSailor
    • Thread
    • a440 dynaco power transformer
    • Replies: 2
    • Forum: DIY
  16. jdsalinger

    Shawnee, KS Dynaco A-10, A-25, A-50

    https://kansascity.craigslist.org/ele/d/shawnee-dynaco-vintage-speakers/7047002133.html Not exactly GIVING them away, but rare. I've never even heard of A10's and A50's No affiliation.
  17. pfigueroa

    Dynaco A25 SEAS 25F-EW H336 Woofer problem / blown

    Hi everyone, This is my first post, so thank you all for your time solving doubts and questions from rookies like me. I recently bought a pair of Dynaco A25 speakers. When I was checking them, I noticed that one of the woofers was making a slight buzz. The next day, this woofer stopped...
    • pfigueroa
    • Thread
    • 25f-ew a25 dynaco h336 seas woofer
    • Replies: 5
    • Forum: Speakers
  18. Strgazr1967

    Welborne Labs ST70 bias, caps and tube questions

    I picked up this ST-70 a few weeks ago and have been cleaning it, going over it and deciding on tube choice for when I set it up after Christmas. The wife's decorations require I take my system out for the holidays. I have a few questions. While going over the amp I noticed that whoever did the...
    • Strgazr1967
    • Thread
    • bias adjustement capacitors dynaco gold lion st-70 tube amp bias issues tubes
    • Replies: 1
    • Forum: Tube Audio
  19. Zack Sainz

    Dynaco A25 - Dead Tweeter

    Hello all! I bought A25s 2 months ago for $175, and just last weekend one of the tweeters was going in and out. I took it into the shop and the tech said it was dead. RIP. I was reading about updating with the newer SEAS tweeter. Does anyone have any thoughts about the updated tweeter?
  20. 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...
  21. D

    Long time lurker first time member!

    I just want to say in advance... Thank you all. I have been collecting vinyl and vintage equipment for about 5 years. This website has been absolutely instrumental in my hobby. I don’t really have a good reason for not signing up sooner. I think maybe I did not feel I was worthy of joining in on...
    • Dzaruk
    • Thread
    • advent braun denon dynaco mci pioneer sansui sony thorens
    • Replies: 24
    • Forum: Introductions
  22. 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
  23. Stephen W

    I have a Dynaco Pat5 MOSFET...

    Currently I am using the Class A preamp section of an Onkyo amplifier with my Dynaco ST70 amplifier. I have a Pat5 that is a bit old and noisy. Am I better off cleaning up or restoring the PAT5 or staying with my current setup?
  24. M

    Dynaco st-70 repair in Brooklyn New York

    Hi, I am looking for a referral for someone who can handle some basic repairs on a Dynaco St-70 in Brooklyn New York. One of the RCA terminals needs to be repaired. Google searches have not turned up anything useful. thanks in advance, Mike
  25. David_NC

    Name That Tube!

    I've been running my Dynaco ST-70 on some cheap JJ EL34's while I was getting it sorted out, tested, etc. Last night, I traded them out for the ones that came with it. It looks like much of the printing on the tubes has been removed. The 7199's are Tung-Sol, and the GZ34 is labeled Dynaco, so...
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