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dynaco

  1. dschulma

    McIntosh, Krell, Conrad Johnson -- High-End Vintage Audio Online Auction

    Jul 30 @ 7:00 pm – Aug 13 @ 7:00 pm Click HERE to view the catalog, register and bid This auction brings together one of the finest selections of vintage high-end audio components we’ve had the pleasure of offering. Whether your passion is classic American tube gear, high-end solid-state, or...
  2. bandtuber

    Mike LaFevre and the Peerless/Acrosound IP

    Several years ago, transformer guru Mike LaFevre passed away. If you didn't know, he was the owner of all of the intellectual property of Dynaco, Acrosound, and Peerless transformers and apparently knew the "secret sauce" on how to wind all of them (including some Western transformers like the...
    • bandtuber
    • Thread
    • acrosound dynaco magnequest peerless western electric
    • Replies: 7
    • Forum: Tube Audio
  3. R

    SCA-35 loses channel

    Hi, I have a Dynaco SCA-35 that drives me crazy. It works fine apart from one thing: occasionally the left channel goes quit. Turning the input selector back and forth a few times "solves" the problem. Until the next time it appears. I've tried the following, with no success: Using another...
  4. R

    Work on my Dynaco A25X's

    I recently picked up a pair of Dynaco A25X's the were in pretty good shape but needed some love. Since I find them pleasing to listen to I decided to do a little work on them. I picked up some Howard's Restore A Finish and also Howard's Feen N Wax. I am very pleased at the results I got.
  5. W

    Purchasing a Dynaco ST70 that I can't Test

    I recently got the opportunity to purchase a Dynakit ST70 from a friend. These belonged to his father who has now passed away. I don't have a way to test the amp and have limited knowledge about tube amps. From the photos he sent it seems it is missing the fuse in the rear side. Could this be an...
  6. T

    Restomod Dynaco Stereo 120 — high DC offset

    I am rebuilding a Dynaco Stereo 120, with UpdateMyDynaco power supply and replacement caps, and the eBay TIP-mod amplifier boards, and I am seeing two issues that I could use some help with. 1) High DC offset (~200mV), and 2) the #4 and #14 eyelets are reading 71.3V instead of 36 and 37V...
    • TXGardener
    • Thread
    • amplifer dc offset dynaco dynaco 120 upgrade
    • Replies: 5
    • Forum: Solid State
  7. tlann

    Dynaco SCA-35 Heat with Wood Case

    Hey everyone, I’d love to hear from anyone who has run a Dynaco SCA-35 with the Dynaco wood case that has the routed slots on top — that is, the Dynaco cab 1D. I’ve read some people speculating that the SCA-35 would get too hot in a wood case, but I would be curious to hear from anyone who has...
    • tlann
    • Thread
    • dynaco dynaco sca 35 overheat tube amp wood wood case
    • Replies: 22
    • Forum: Tube Audio
  8. D

    Dynaco A-250 any info are they Rare?

    Hi I picked up these Dynaco A-250's. Can't find a lot of info on them. Seem to be made around 79 or 80 I think after Dynaco sold to ESS. They don't have seas drivers no drivers are marked except for tweeters are polydax, 3" mid-range is just stamped Japan, woofers are stamped with date Oct 26...
  9. Walter R

    Dynaco PAS3 noise

    I recently acquired a Dynaco PAS3 preamp. It has a new pc board replacing the selenium rectifier and associated filter capacitors. There is a slight hiss or hum at low volume. It doesn’t sound like power supply hum. It doesn’t increase when I turn up the volume. In fact, with no input...
  10. ferran39

    Dynaco SCA 35, garbage find

    Hello guys, My very first post here in AK, some few weeks ago I found a Dynaco SCA-35 in the garbage (no joke), physically it looks quite ok for its age, I found that the volume pot was a bit stiff and the balance, bass and treble pots were completely stiff and not turning at all. I have to say...
    • ferran39
    • Thread
    • dynaco dynaco sca 35 garbage find
    • Replies: 37
    • Forum: Tube Audio
  11. albusark

    Chassis Corrosion - Dynaco SCA-35

    Hi all, I've become a Dynaco fanatic and have started buying and rebuilding various amps to gift to friends and family. I just received one off the bay and electronically it looks pretty good, was previously recapped and resistored. However, at some point prior to being sold off, someone got...
  12. Refugee

    Dynaco Pat 4 preamp hum - Replace multi-cap

    Quick project: My Dynaco Pat-4 preamp started humming. I decided to change out the main filter cap in the power supply. I did not want to spend much time/money on this so I did not obsess on the purchase of a multi-cap that matched well as I usually do. I also did not use a terminal strip for...
    • Refugee
    • Thread
    • dynaco dynaco pat-4 multi-cap replacement pat 4 repair
    • Replies: 1
    • Forum: Solid State
  13. B

    Replacement tweeters on B&W DM4s

    I have a chance to get these B&W DM4s. I went to the store selling them, listened to them and they sounded good, so I put down a small deposit. But when I showed this picture to a friend, he mentioned he thinks the super tweeter on top is not original. My research says this super tweeter should...
    • bjoseff44
    • Thread
    • b&w b&w dm4 dynaco dynaco 25 dynaco a-25 dynaco a25
    • Replies: 9
    • Forum: Speakers
  14. R

    Dynaco stereo 400 distorted channel repair

    Hello, left channel is distorted at any volume. Found the emitter resistors to be brittle and cracked. I have a mouser cart to be filled. Any other known 400 issues? For now I've ordered 2. New pc-28 boards but if I can fix with a few mouser parts, I'd save $170. Which I'd prefer. Thanks yall.
    • robc23
    • Thread
    • 400 channel distorted dynaco stereo
    • Replies: 8
    • Forum: Solid State
  15. Carbsandcaps

    Dynaco st-70 identification

    Just picked up this dynaco st-70 from a guy who got a bunch of dynaco stuff from an estate sale. It’s obviously a mk1 but it uses 6gh8a driver tubes. I’m sure the driver board has been replaced since it looks newer and definitely has new caps and resistors. Any info would be appreciated.
  16. bad_boo

    Dynaco A25 XL, Restoration Process

    I recently got a hold of a pair of Dynaco A25, for $20cad at my local thrift store. After reviewing them online, I realized I got the XL version. H086 tweeter with SEAS drivers. They are pretty beat up and I have started restoring them, and will go up to refinishing the cabinets and rebuilding...
  17. tlann

    Klipsch KG4 vs. JBL L26

    For the last three years I’ve been on the hunt for some Klipsch Heresys at a reasonable price point ($550 or below), and though I’ve come across a few possibilities, it has never panned out — someone always makes their way to the deal before I’m out of work or something like that. Pretty...
    • tlann
    • Thread
    • dynaco dynaco sca 35 heresy jbl jbl decade 26 jbl l26 klipsch klipsch heresy klipsch kg4 listening room
    • Replies: 17
    • Forum: Speakers
  18. Theabea

    Dynaco A-25 Restoration

    Hi all— This is my first time posting on the forum. I just bought a pair of used Dynaco A-25s at an auction. They sound great, but have light discoloration (pictured below) and are missing a grill cloth and frame. I found a great fabric match as well as the Dynaco name plates. This will be a...
    • Theabea
    • Thread
    • dynaco frame grill repair speaker restoration
    • Replies: 13
    • Forum: Speakers
  19. tlann

    Klipsch Tangent 50 Value

    Hi everyone, I'm wondering what a decent price would be for Klipsch Tangent 50s in good condition. I've found some numbers online elsewhere, but most of those posts are from more than a decade ago, when vintage audio was generally cheaper. I'm looking at a pair for $250 and am wondering if...
    • tlann
    • Thread
    • dynaco dynaco sca-35 klipsch klipsch heresy klipsch tangent klipsch tangent 50 value
    • Replies: 15
    • Forum: Dollars and Sense
  20. Dynaco30 - Mirror Finish

    Dynaco30 - Mirror Finish

    Restoring a pair of Dynaco Mark III mono block amplifiers.
    • cosme
    • Media item
    • dynaco mark 3 mark iii mk3
    • Comments: 0
    • Album: Dynaco Mark III - 2023 Restoration
  21. Dynaco29 - Replated Chassis

    Dynaco29 - Replated Chassis

    Restoring a pair of Dynaco Mark III mono block amplifiers.
    • cosme
    • Media item
    • dynaco mark 3 mark iii mk3
    • Comments: 0
    • Album: Dynaco Mark III - 2023 Restoration
  22. Refugee

    DYNACO ST-120 Restore to former glory

    Dynaco stereo120a Restoration I have had this unit for many years. The last time it was in service was about 15 years ago. As far as I can remember, it was working well. I did not test the unit before I began working because I was worried about causing damage by powering up before some...
    • Refugee
    • Thread
    • capacitor coupled dynaco dynaco 120 dynaco st-120 dynaco st120 parts list recap recap and restoration updatemydynaco
    • Replies: 35
    • Forum: Solid State
  23. Dynaco28

    Dynaco28

    2023 restoration of Dynaco Mark III mono block amplifiers.
    • cosme
    • Media item
    • dynaco mark 3 mark iii mk3 mkiii
    • Comments: 0
    • Album: Dynaco Mark III - 2023 Restoration
  24. cosme

    Dynaco Mark III Restoration (2023)

    I thought I'd let everyone follow along as I restore a set of Dynaco Mark III mono block amplifiers. I have benefited greatly from this community (general discussion, KLH Model 6 restore thread, etc.) and thought I'd create this thread for anyone else looking to do a full restoration this year...
    • cosme
    • Thread
    • dynaco mark 3 mark iii
    • Replies: 74
    • Forum: Tube Audio
  25. Dynaco 27 - Lid (After)

    Dynaco 27 - Lid (After)

    2023 restoration of Dynaco Mark III mono block amplifiers.
    • cosme
    • Media item
    • dynaco mark 3 mark iii
    • Comments: 0
    • Album: Dynaco Mark III - 2023 Restoration
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