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tube amp amplifier

  1. ibm3270

    Help identifying P.A. tube amp

    Hello! The Borough in Donora is planning on bringing their antique Public Address system online for it's 125th Quasiquicentennial celebration. Numerous hours searching online has returned zero results with the manufacturer of their historical amp. Historically there was a Montgomery Ward in...
    • ibm3270
    • Thread
    • identify tube amp tube amp amplifier tube amp chassis
    • Replies: 13
    • Forum: Tube Audio
  2. plbeard

    60s Hifi Tube Amp Repair in Northeast?

    I am looking for tube amp repair in the Northeast (although the location may be moot, as it made need to be shipped regardless). These are mid-60s amps by Dynaco (a stereo pre-amp) and Harman Kardon (A500) that work but need modest repair or rehab. No MacIntosh-type stuff, but good. I am near...
    • plbeard
    • Thread
    • dynacco harman kardon repair amplifier tube amp amplifier
    • Replies: 11
    • Forum: Tube Audio
  3. M

    Oldchen EL34 SE – Tubes light but totally silent. Pin 8 (rectifier socket) → first filter cap (+) reads “OL”. Safe to add a new lead?

    Hi all, my Oldchen EL34 single-ended amp heats up fine but there’s no sound at all (no hiss/hum). What I checked (power off, caps discharged): Heaters OK; all tubes glow. HV secondary looks OK (both rectifier anode leads show similar DC resistance; between them the sum). Key finding: Between...
    • MCR
    • Thread
    • single ended tube tube amp amplifier
    • Replies: 5
    • Forum: Tube Audio
  4. Subchannel

    LE Audio VM60 problems

    I bought a pair of LE Audio VM 60 tube monoblocks, and the previous owner have put one of the output tubes in the wrong way (broken tab on the tube socket). I have tried to measure it, and D159 measures different from the other three (one for each output tube. Three measures a bit over 3ohms...
    • Subchannel
    • Thread
    • tube amp tube amp amplifier tube amp help
    • Replies: 15
    • Forum: Tube Audio
  5. J

    My dad passed and I found a half assembled DIY preamp without schematics. Any help or advice would be great.

    My dad passed three years ago and I'm picking up the pieces. I didn't know that he left me with this in progress preamp until recently. He also has a phono stage (no pictures in this post), but it's even more incomplete. With a family friend (close friend with my dad), we determined that it is...
    • jwbcp
    • Thread
    • tube tube amp amplifier tube amp build tube amp help
    • Replies: 53
    • Forum: Tube Audio
  6. T

    WESTERN ELECTRIC TUBE AMP ID ??? ANYONE EVER SEEN THIS BEFORE ? NO INFO AT ALL !!

    Hello everyone - came across this over the weekend at estate - never seen it before or heard of Hollywood Electronics - Its licensed by Western Electric ( says this on the label i attached - very first thing in writing if you can see it with my photo) but i cant find any details ... it weird -...
    • tolemac
    • Thread
    • rare tube amp amplifier vintage audio western electric
    • Replies: 28
    • Forum: Tube Audio
  7. PierreClé

    Matrix to link audio equipements

    Hi! I am looking at some sort of matrix or switch box that give the ability to change the audio signal path through various Hi-Fi audio equipements without having the need to connect/ disconnect jumpers and other audio cables all the time. In my case and as an exemple, I would like to connect at...
  8. Oscarshock

    How much is the Tube Preamp Heathkit sp2 worth?

    Hi, I am a budget audiophile and I already have a complete SS stereo system but I always want to taste the tube stereo components. I found this preamp for sale in my local market and it was asked for 650 CAD (~520 USD), the owner claimed that this preamp was equipped with an upgrade kit from...
  9. Oscarshock

    What do you guys think about Scott LK79B integrated tube amp

    Hi, I saw this vintage amp for sale on my local market and according to what I read, it seems to have a good reputation, but just in case, I want to gather more advice before I pull the trigger. Here is the basic information about this unit, According to the seller, it will come with all the...
    • Oscarshock
    • Thread
    • pre amp tube tube amp amplifier tube pre-amplifier
    • Replies: 30
    • Forum: Tube Audio
  10. J

    New Member- First Tube Amplifier Acquired Dynco ST70 Custom Questions on Mods

    Hello, I am new to audio in general and tubes as of one week. The unit I got was made by Jim Fosgate and it works great. [I am running Klipsch quartets with redone insides and titanium tweeter, I have black ice dac coming soon (this weekend!) because it seemed fitting to get something else to...
    • Jordansky
    • Thread
    • dynaco st 70 new member tube amp amplifier
    • Replies: 12
    • Forum: Tube Audio
  11. D

    Marantz 8B Restoration

    Hello everyone, I recently picked up a Marantz 8B. It was sitting in a storage area in a church that had been shut down. The local diocese was trying to sell or get rid of whatever they could that was in the building, so I went to get some office furniture on the cheap. I didn't even know...
    • Derek Miller
    • Thread
    • marantz 8b restoration help restoration novice restoration project tube amp amplifier
    • Replies: 30
    • Forum: Tube Audio
  12. J

    Jolida SJ-502A

    I just bought a SJ-502A and trying to troubleshoot. The schematics I found don't exactly match up 100% and want to make sure the voltages are correct before shoving $500 + in tubes into it seeing how it is 20 years old or so. So at the moment B+ is 530v, -B is at -72v, +B1 is at 502v and +B2 is...
    • JMinardi
    • Thread
    • jolida sj-502a tube amp amplifier
    • Replies: 6
    • Forum: Tube Audio
  13. Solheim

    Tube Amp Mystery Failure

    I have an Audio Research VT 130 that is presenting odd symptoms. It has blown a small resistor (see pic) twice- once dramatically. Sometimes you can hear buzzing in the left channel. Here's the odd thing- The V5 and V7 tubes glow brighter and dimmer at random times. (the rest of the tubes are...
    • Solheim
    • Thread
    • amp failure red plating transformer problem tube amp amplifier
    • Replies: 31
    • Forum: Tube Audio
  14. M

    Proud New Member

    Thank you for accepting my request to join. I've actually used AK as a great reference guide and it's also a great source of comradery as seen by most of your long standing members. It nice to be included. My personal likes are: Panasonic (Are you still reading... If so thank you. It's...
    • Manaboutahor
    • Thread
    • help love at first ear love you guys main amp main driver board newbie tube amp amplifier wtf
    • Replies: 17
    • Forum: Introductions
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