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dynaco

  1. sabrefencer

    Dynaco MkIII restoration - join the ride

    I know I'm not the first, but I have started a restoration/"upgrade" of a pair of Dynakit MK IIIs and want my AK friends to join in on the fun. These were recently acquired from fellow NC AKer Nolasally, are completely original and they checked out OK on the bench, so there should be no big...
  2. bigcaps

    More Sound Valves gear..

    1996 SV, Rebuilt in 2018 M60 mono blocks.. Class A 30 watt OR class AB 60 watt via a deck mounted switch. 60 watt @ 0.05THD &N with SN 96db 50 Damping control.. 1996 dated SV VTP 101i pre amp..A last gen build of the Series 2 mk4 preamps from Dynaco fame.. SoundValves made some great changes...
    • bigcaps
    • Thread
    • dynaco mono blocks soundvalves usa madetube audio
    • Replies: 5
    • Forum: Tube Audio
  3. 8xlaxx

    Dynaco A50 Questions, part ID

    Recently acquired some A50s. Played music through them and one tweeter was not functioning. Rotation of the switch did not improve things. Pulled the woofers and found the following. What is the red wirewound part? What is its ratings? It is snapped in two and was resting on the cap...
    • 8xlaxx
    • Thread
    • a25 a50 dynaco scan speak seas
    • Replies: 37
    • Forum: Speakers
  4. M

    Dynaco ST70 low bias - help needed

    Recently purchased a dynaco st70 and everything appears to work - sound seems decent, but measurements from unit aren’t aligning with manual. Quad cap, bias knobs and caps and selenium rectifier appear to have been replaced. bias measurements are low also - ~0.36 images and measurements...
  5. zastin17

    Dynaco St-70 Running On a 83 Murcury Vapor Recitifer!!

    Now why did I do this? Is it for better sound? No absolutely not. Is it because i'ts beautiful and dangerous and wacky? Yea, probably!!! I made an adapter with a socket saver and 4Pin socket just soldering through the pins. 3A filament, very close to 5U4, but far better in voltage drop. If I...
    • zastin17
    • Thread
    • 83 adapter dynaco murcury rectifier st-70
    • Replies: 49
    • Forum: Tube Audio
  6. johnnytheg

    A question about biasing new tubes

    Hi all, I just replaced seven year old Svetlana EL34 tubes (one of the tubes shorted) with Mullard re-issues. When I hooked up the new tubes and let the amp warm up (twenty minutes) I hooked up my multi-meter. The previous older tubes had the bias set to 1.56 (dynaco specifications) but when I...
  7. David_NC

    Dynaco ST-70 - Upgrade Time?

    I bought this ST-70 about 2 years from a local GW. It came with good T-S 7199's and Philips EL34 / 6CA7's. It's in great shape and worked well, but I replaced the selenium rectifier, multi can cap, caps and resistors underneath, and the six caps on the driver board before putting it into use...
  8. S

    Dynaco Pat 4 hum troubleshooting

    Hi All, So I've got a Pat-4 that started to hum recently. I've had it for decades, and this just started happening. A few observations: - The hum is NOT dependent on the pre-amp volume channel, balance treble, hi filter, mono/stereo, or the loudness. - The hum gets worse when turning up the...
  9. W

    Dynaco 416 and C100 in SW Wisconsin

    Saw this on my local Clist and figure to share, looks like it's in pretty good shape: https://madison.craigslist.org/ele/d/cuba-city-vintage-dynaco-416-power-amp/7255492311.html
  10. zastin17

    Dynaco ST-70, What an Amazing Amp!!

    So I got myself an early Christmas present. And I am very happy I did!! What an incredible midrange, and beautifull highs. So diffrent from anything I've heared, but is so fun to listen too. Sooo holographic, so mutch coherent texture. The sound has a physical presence that is very, very real...
  11. phishterr

    New to tubes, looking for recommendations

    So I recently added tubes to my system for the first time and I’m pretty sure I wasted the first 32 years of my life with solid state. It’d always been a vintage amp guy and owned pioneer, marantz, technics and more marantz. This Dynaco st-35 makes them all look like a joke. I’ll never go...
  12. Homey4uk

    Mis-matched Dynaco purchase.......Help!

    Hello audio addicted friends and wise mentors. I made an embarrassing mistake I need advice on how to best remedy. I peruse the cesspool called Facebook almost daily, with 99% of the time spent to access the Marketplace and look at local gear for sale. Well, I saw a listing last week that didn't...
    • Homey4uk
    • Thread
    • diy help needed dynaco dynaco 25 dynaco a-25 speakers speakers - suggestion
    • Replies: 18
    • Forum: Speakers
  13. HowlerMonkey

    dynaco ST-70 w/ou bias sets

    I have this great ST-70 that i bought from a fellow Ak'er. It is a very clean kit with the only "non standard" difference that the front sockets to check the bias have not been wired. I am debating if i have the skills to wire them myself (i might need step by step instructions like the ones you...
  14. K

    Classic Story and a Question re KLH Model Six (6)

    Nearly 50 years ago, after hanging with a friend in his father's man cave (yes, they existed back then) with McIntosh Tube components and Klipsch Corner Speakers (the big ones) - I decided to build a Dynaco system and bought a pair of KLH Model 6 speakers with the proceeds from a few weeks...
    • KeithTr
    • Thread
    • dynaco klh klh model 6
    • Replies: 27
    • Forum: Speakers
  15. R

    Thoughts on restoring a Dynaco ST70

    Hi everyone, I recently came in possession of an ST70 factory wired, all original components. Other than a hum in one of the channels that I traced to the 7199 tube on one side, it's fully functional. I'm very comfortable around electronics but I am relatively new to tubes. I want to ask you...
    • radu_c
    • Thread
    • 7199 dynaco gz34 restoration st70 tubes
    • Replies: 62
    • Forum: Tube Audio
  16. TellMeWhy

    What are these Dynaco A25 lookalikes?

    These look very much like A25's in a nicer cabinet, without the treble attenuation pot. Dynaco 1 by Jon_Bawn posted Sep 6, 2020 at 1:00 PM Dynaco 2 by Jon_Bawn posted Sep 6, 2020 at 1:02 PM Dynaco 3 by Jon_Bawn posted Sep 6, 2020 at 1:03 PM Anyone got any thoughts? Cheers, Jon
  17. Benjib

    Nicely Updated Dynaco ST-35 or Stock Fisher SA-100?

    I need help. I am finally putting together my first tube-based system. I have initial budget of approximately $1000 CAD for an amp. In my area there are two amps that I like (but haven't heard). One is a nicely updated but mostly stock Dynaco ST-35 with new boards/components, new tubes, new...
    • Benjib
    • Thread
    • dyna dynaco fisher help opinion request st35 tube
    • Replies: 30
    • Forum: Tube Audio
  18. Isaac C.

    Dynaco A25s With 3.9 Ohm Resistors?

    Hello everyone, I just recapped my A25s and aftering looking over some of the pictures I took I noticed these have 3.9 ohm and 4.7 ohm resistors where others I've seen have 2.2 ohms. Any reason for this? From what I can tell these have never been opened.
    • Isaac C.
    • Thread
    • dynaco dynaco a25 resistors
    • Replies: 5
    • Forum: Speakers
  19. H

    Dual ST-70s dilemma

    Hey all, looking for some ideas from the braintrust here. I’ve recently acquired two, original, factory-wired Dynaco ST-70s. I have an Acoustat preamp with dual stereo outs that I originally thought I would just run to each ST-70. Now I’m thinking that I might need something in between that...
  20. HowlerMonkey

    Eico HF-85 for Dynaco ST-70, can they be a match?

    I have been looking for a tube preamplifer for a while but there is rarely anything below $500 in my area. And when there is one, I don't have the cash on hand and miss the opportunities lol (like the Audio Illusions 2A for $450) Anyways, I am ready to shoot above $500 now and I am going to...
  21. Chris Rush

    Dynaco ST-150 Recap

    I was thinking about recappng my ST-150, and I found these posted on ebay: https://www.ebay.com/itm/2x-HiFi-Audio-Filter-Capacitor-10000uF-100V-ELNA-Electrolytic-Capacitors-35x80/153461069387?hash=item23bafe164b:g:mPcAAOSwO-pcPsiL But then, I came across this video: While ALL the ebay...
    • Chris Rush
    • Thread
    • dynaco recap and restoration stereo amplifier
    • Replies: 19
    • Forum: Solid State
  22. Kingpin5

    Marantz 3200 into a Dynaco ST-150

    Having a brain freeze. Can a Marantz 3200 Stereo console preamp be jacked into a Dynamo ST-150 amp without fear of damage to either? Thanks
  23. T

    Dynakit ST70

    Hey everyone, I just purchased a Dynakit ST70 Amp along with a PAS-2 PreAmp, and FM-1 Tuner. I am looking to restore them to original condition and this is the thread tor the ST70. I am looking for tips, tricks, and help to bring it back to life. My intentions are to replace capacitors and keep...
  24. Chriswede

    Dynaco ST-400

    Hiya! Greetings from Sweden! Bought one of these and have been coaming the net for info. This is a EU 240v unit. Sitting on Mouser getting an order in. I will make an attempt to get this in working order, amateur as I am; stock, no serious mods or anything. Just upping some component voltage...
  25. T

    Dynakit Stereo 70, Dynaco PAS-2, Dynatuner FM-1

    Hello everyone, I need some opinions on some old Dynaco Stuff. I have the option to buy a Dynaco package consisting of a Stereo 70 Amp, PAS-2 Preamp, and FM-1 Tuner for $650 in unknown condition. They have been in storage for years and the guy said they worked before putting them there. I am...
    • Tucker_515
    • Thread
    • dynaco dynakit dynatuner fm-1 psa-2 stereo 70
    • Replies: 4
    • Forum: Tube Audio
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