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dynaco

  1. B

    Heathkit AA141 preamp 5 - 12AX7 version - anyone with experience

    I've had a Dynaco Pas 2 for a little while, and have been very happy with it. It has the tone controls out and a new rectifier and new caps and all the hoop-lah ... I use it with a Bob Latino ST70 and an original ST70. I just picked up a Heathkit AA141 and hope to emulate the mods/updates...
  2. Nemo bit

    Pics of my old school space

    I am Nemo This is pretty much what I do. I have several different systems. this is the one in my largest space and gets the most play. ( this or a variance of it) I fiqured I had better take a few shots while it was in a reasonable order! Cheers, Nemo
  3. C

    Dynaco A50 - help and information needed

    Hello all, I just procured a set of Dynaco A50s, they were less than ideal but I have been looking for a while now and these were what worked out to get so far. I hooked them up to two different amps and have been having problems with them. What I know from previous owner: Both tweeters were...
  4. ctjetta

    PAS "clone" help needed

    This has been a project that's been sitting on the shelf, as is often the case for me. I had purchased from Tube 4 Hi-FI (at the time) an Akido line and a PAS PC6 phono kit, among other items including a new copy of the chassis. I've yet to tackle any of it. I am currently looking for the...
  5. 45Lennie

    Acoustic Research 11

    I would like to start by saying, I messed up big time with unexpected positive results with my AR 11's. A while back I attempted to replace the deterating felt around the tweeters. While doing so, without thinking I used a razor blade and scraped away the wires to the dome. After punishing...
    • 45Lennie
    • Thread
    • ar bozak crown dynaco marantz sony thorens
    • Replies: 5
    • Forum: Speakers
  6. currituckco

    Squeals of displeasure from DIY Dynaco ST35 clone

    I previously discussed this amp here: http://www.audiokarma.org/forums/index.php?threads/problem-with-a-diy-dynaco-st-35-clone.820247/ But the problem persists - squeals & motorboating as soon as it warms up. I wondered if it was the driver tubes (new JJ 12DW7) but didn't have any others on...
  7. J

    DYNA ST-70 Harmonic Distortion Testing using all 1960's Heathkit Tube Technology

    In this video I will demonstrate harmonic distortion testing of my Dynaco ST 70 amplifier using all Heathkit tube gear from the 50's and 60's. This demonstration will show the THD produced from this amplifier at 2KHZ using three different power inputs. The equipment used includes: Heathkit...
    • JRUBIN
    • Thread
    • dyna dynaco heathkit ig-72 ig72 im-12 im12 st-70 st70
    • Replies: 15
    • Forum: Tube Audio
  8. paysonmark

    dynaco st-70 can capacitor replacement questions

    OK, I am re-capping my st70 and I bought a 80/40/30/20 525v can cap from AES in AZ. I have read that the 80uf lug needs to face the back of the chassis. I am not sure of the orientation of the symbols on the bottom. Do I install the same as the factory 30/20/20/20 or do I turn 90 degrees...
  9. currituckco

    Problem with a DIY Dynaco ST-35 clone

    Hi all, I'm building a Dyna SCA-35/ST-35 hybrid clone and having some trouble. I have the thing built right now as an ST-35, without the phono board built out (an SCA-35 is basically an ST-35 plus a phono stage and selector switch/volume/tone controls, plus a higher gain, worse sounding driver...
  10. 8xlaxx

    Let's look at a Dynaco PAS-3x

    Seeking expertise for my PAS-3x with some symptoms it's having and where I should start in resolving issues. This pre is new to me and I have no knowledge on the back history. For the most part it looks stock, powers up and plays but there are a couple changes on it. In using the phono...
    • 8xlaxx
    • Thread
    • 12ax7 dynaco pas-3x telefunkens
    • Replies: 16
    • Forum: Tube Audio
  11. cocovinyl176

    Dynaco A-150L?

    Hi Friends, Anyone know anything about the Dynaco a-150L speakers? I can not find much of anything online. I suspect they may be from the late 70's early 80's, walnut linear cabs, 2 way speaker? I can pick up a set for roughly 50.00 with stands. Any thoughts out there? thanks, and as always...
  12. cocovinyl176

    Trade MC250 SS for Dynaco st70 Tubes?

    Hello all, I know some of you will be bias in one way or another regarding SS vs Tube, but thought I'd throw this out to the AudioKarma world to gather some thoughts. A trade: Mcintosh MC250 for Dynaco st70 Both units are cosmetically 9/10 with zero rust or pitting Both units are in its...
  13. K

    Dynaco 6v6 Ultra Linear Tube Amplifier PCB Questions

    Hello, Another post seeking help wiring a nondescript Dynaco tube board from Ebay. This one is a Dynaco 6v6 ultra linear circuit. I have the power supply issue under control, but I'm looking for advice on how to properly wire the output transformers to the board. I've read that the OPT for...
    • KCharlemagne
    • Thread
    • 6v6 amplifier board diy dynaco tube ultralinear
    • Replies: 4
    • Forum: DIY
  14. H713

    A few more DIY Tube amp Questions

    After a bit of pondering after my last post, I've got two designs in mind. I'd prefer not to spend the $250 on a pair of ST-70 output transformers. I'd like to keep the output transformers under 200. I'm trying to decide between building an "ST-70" with Edcor transformers (probably have to be a...
    • H713
    • Thread
    • dynaco st-35 st-70 transformers tube amp
    • Replies: 1
    • Forum: DIY
  15. D

    Barzilay console with Dynaco componets

    Hi, New to the group and was just trying to find information on this console and the components. Got it from the original owner with the documents and boxes. Any ideas on the components and console? Thanks! DOUG
  16. Triglav427

    Dynaco Stereo 400 to Stereo 410 Conversion

    Hey everyone, new member, long time lurker that needs some opinions and direction. I recently did a light restoration on a Dynaco Stereo 410. Needed a refresh so put in new PC-28 boards and replaced the output transistors (old man had previously redid the two large caps which improved bass...
  17. W

    Dynaco - input compatibility

    Hello! I am the original owner (and builder) of a Dynaco PAS-3x, ST-70 and and solid state FM-5. Built them back in 1970 and loved that system dearly! ok, fast forward 50 years.. i recently pulled all of them out of mothballs and am firing the system back up again. I am currently trying to...
  18. pjrengineer

    Dynaco A10 Help potentially blown woofer

    Hello I recently had my turntable playing on my amp and was figeting with the turntable ground wire connection. A “pop” noise was heard through the speakers and one of the dynacos stopped working correctly and completely went out. I decided rather than try to fix them I want to upgrade them...
  19. W

    Dynaco Mystery Speakers Investigation

    I picked these speakers up from a thrift store, and they need some work but the origins seem very confusing. I have not been able to find the same model speakers anywhere. I understand that Dynaco is a popular brand, and I see a lot of talk about A-10s and A-25s etc. But these are labeled as...
  20. Tikkun

    Searching for a 14" driver...

    Hi all, new to this. I picked up a pair of Sansui SP-3500s over the weekend for $225 on craigslist. I have them paired with a rebuilt Dynaco ST-70 and I have to say I'm very happy with the purchase. I'm currently deciding on whether I should go with these or a pair of Audioengine HDP6 speakers...
    • Tikkun
    • Thread
    • audioengine cones drivers dynaco sansui size speakers vintage woofers
    • Replies: 5
    • Forum: DIY
  21. F

    Thinking about buying this Dynaco ST70, is it worth it for a beginner?

    Hey guys, I've never been on this forum before but I was refered here and thought you might have some good info. I can get my hands on a ST70 for around $350, but only until tomorrow. I've been really interested in getting into speaker set ups and especially tube amps as a fledgling headphone...
    • Fredark
    • Thread
    • beginner buying diy dynaco dynaco st70 fix st70 tube tube amp used
    • Replies: 4
    • Forum: Dollars and Sense
  22. Cabdiver

    Dynaco ST70 rebuild with Triode boards

    Hello everyone. I'm a newbie with more enthusiasm than good sense who bought the Triode E input (Driver) and capacitor (power) boards in an attempt to bring an ST70 back to life. I've completed the boards and placed them in position on the chassis, but have gotten stuck on the final stages of...
  23. D

    Dynaco Stereo 400 Fuse and Fuse Caps

    Might anyone know where I can buy or replace fuse and fuse caps for a Dynaco Stereo 400? Any help or points in the right direction are greatly appreciated. Attached is the current fuse/cap that needs to be matched.
    • ddcarmon
    • Thread
    • 400 dynaco fuse fusecap stereo
    • Replies: 12
    • Forum: DIY
  24. DanGuitarMan

    Dynaco ST-35 bias voltage skyrocket

    A few years ago I rebuilt a Dynaco ST-35 using Dave Gillespie's boards and I've encountered a problem that I haven't been able to figure out. I've reached out to Dave and he has been very helpful so far, but I thought it couldn't hurt asking the rest of the AK community. A few weeks ago a tube...
  25. RibbonAddict

    Complications of using 2c22/7193's on ST-70 Driver Board?

    Hey all, it's finally time to replace the 7199's on my ST-70, so I've been taking a look at just upgrading the entire driver board entirely. The 12AU7 and 6SN7 boards seem to be the common swaps, but I've been curious as to whether it would be more effective to simply create a board with two...
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