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tube

  1. sean sweeney

    Question on 1959 Crown SXA tube amp power supply, switching noise from half wave rectifiers?? 120hz hum.

    So I got this amp in a trade deal a few weeks ago, and after one issue of basically building it back from scratch, from a blurry schematic from 1960, I still am getting some 120hz hum when the unit is idling, with the inputs shorted. I just replaced the selenium rectifier, and that seemed to...
    • sean sweeney
    • Thread
    • 1959 amp amplifier control crown gcr monitor studio sxa tube
    • Replies: 175
    • Forum: Tube Audio
  2. A

    Lafayette LR-400 Dial Glass

    I search of a Lafayette LR-400 dial glass or a parts unit with good glass. Hope someone can help. Purchased recently and was damage during shipping. My unit works and sounds great. Has a great tuner. Thanks in advance Tony Pennsylvania
  3. Wolfwood

    Vintage Jensen DIY open baffle towers

    Been working on these for the last month. Cabinet and baffles made from 3/4 inch MDF. Each tower has - 2 H223f Coaxial units 1 RP 103b Horn 1 P8UM Midrange 1 C12NF Low Range Woofer in cabinet. Sorry, lighting is crap in listening space.
    • Wolfwood
    • Thread
    • coaxial jensen speakers tube
    • Replies: 2
    • Forum: DIY
  4. Tonedeftup

    Harman Kardon A30k. Ihave no idea where to start! Actually I do have an idea, this post is it!

    Hey there Community, I have been stalking the forums here for some time. Just made my acct and this is my first post. I just acquired this hk tube amp. It was sitting in a garage cupboard for an indefinite amount of time , likely years, maybe decades. Now what do I do? I know very little...
  5. S

    Mcintosh C2700 + MC275v

    Hello folks, I've recently spent some time to revisit and refine my system again. I have collected a bunch of vintage tubes during the past 10-15 years. Mostly are German (sharper), French (sharp) and UK (smooth) tubes. Has anyone noticing if you put all the way German (TFK) tubes sound...
  6. C

    Modern Brimar tubes

    A simple search on Google shows up the UK Brimar website selling modern Brimar tubes. I know vintage Brimar 12au7 is a good alternative to Millard and maybe Telefunken ones, but what about modern Brimars? Do modern Brimar tubes live up to their glories in the past?
  7. S

    MAGI Stereo Amplifier

    What would a MAGI Stereo Amplifier go for?
  8. Stevenuggies

    Westinghouse H-1793A Stereophonic Record Cabinet Info/Repair Inquiry

    Hey All, This is my first post since I've started lurking in this forum and really appreciate the information I've come across so far. I've owned a Westinghouse H-1793A record cabinet for a while now but recently decided that I wanted to see if I could fix it up a little bit and improve the...
  9. S

    Melos CD-1

    This is a Melos CD-1 from the mid 1980s and it may be a clone(?) of a Philips CD 104. It has tubes in there supposedly. It doesn't have a remote as far as I know. Was this a special CD player in any way?
  10. Wolfwood

    Vintage Jensen coaxial question. What the heck is this thingy?

    I've had a pair of Jensen Coaxials (model h223f) for a decade now. They've mostly just sat around, not making much of a fuss. Minding their own business. These speakers sound quite good for their age and technology. The woofer is Jensen's 12" FLEXAIR woofer. Apparently these "flexair"...
    • Wolfwood
    • Thread
    • capacitor crossover gear messin around potentiometer tube
    • Replies: 3
    • Forum: DIY
  11. gregd

    What’s he building in there?

    I recently participated in an online auction estate sale near me. The auction included probably 500 vintage audio related items, tons of tube gear mostly dynaco, heath kit, Sherwood etc…. It was all untested some in various stages of repair and strewn about several outbuildings open to the...
  12. Oscarshock

    Has anyone heard of Shuguang s200mk before?

    I knew Shuguang was a manufacturer of vacuum tubes but I didn't know they even produced hifi components. I saw this tube preamp online and had only a little information about it so I sought more information from the Chinese website and here is what I got. . This is a tube preamp for the line...
  13. 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
  14. B

    Heathkit SP-2 Service manual

    Hello, I have recently acquired one of these awesome pre-amps and am searching everywhere for a service manual. Does anyone know of a source? I've only found one on ebay and they want $99 for it which I think is crazy. Hoping to find one (even if reasonably priced) online. All I can find is...
    • bboehm
    • Thread
    • heathkit sp-2 sp2 tube vintage
    • Replies: 2
    • Forum: Tube Audio
  15. Steve White

    Nobsound b100 tube or vintage Sansui 4000?

    So I have a Sansui 4000 classic and am trying a Chinese NobSound B100 tube amp From Amazo… i‘m in my 60s, not perfect hearing, and by the time I switch out the speaker wiring, I‘m not sure I can tell a difference. ??? Wow I’ve Klipsch Heresy II speakers so have the efficiency for either. I...
  16. Geek

    3A/109B/110B "B"-type British Socket Source?

    Howdy all, If this is the incorrect section, my apologies and move appropriately :) Anyone got a source for these ancient sockets? Thankees!
    • Geek
    • Thread
    • british socket tube
    • Replies: 2
    • Forum: Tube Audio
  17. Reyhifi

    Confess, is Saturday and you are!!

    Basic Amplifiers Watching a 1950s instructional video a amplifiers. So well explained, just found it. Army Tech
    • Reyhifi
    • Thread
    • amplifiers basics tube video
    • Replies: 3
    • Forum: DIY
  18. EvilHank94

    Help Identifying Vintage Tube Receiver

    Hello friends, I’m looking for some help in identifying this vintage tube amp I came across in my friends basement. He thinks it came out of a record player console cabinet from the 1950’s but is not sure. Just curious if anyone has seen one before, Thanks in advance
  19. J

    Looking for Advice w/ Tube Amplifier

    Hi all, I'm hoping to get some advice on a tube amplifier for my home audio set up. I've wanted to swap out my SS amp for a tube for years to play my record collection ever since a friend introduced me to his, and since one of the channels on my SS recently died, I thought now could be a good...
    • Jez Mur
    • Thread
    • advice reisong tube vienna acoustics speakers
    • Replies: 13
    • Forum: Tube Audio
  20. TunerLanding

    Amp and Preamp Separates (Mix or Match??)

    I'm looking to hear about other enthusiasts' experience with hooking up amps and preamps from different series or different manufacturers etc, as opposed to the matching designated pair. I've heard good things about putting a tube preamp with a powerful solid state amplifier for instance...
  21. M

    Carvin V3 Hissing Issue

    Hello, I have a Carvin V3 stack. For months now it has a problem where it starts hissing out of nowhere, and it will do this whenever it feels like it. I've opened up the amp and tried fiddling with wires to see if I can get it to stop when it happens, with no luck. The only way I can get it to...
  22. Moonwatcher

    1965 Calrad tube tuner (model 202M) signal cutting out

    Hello, all. This Calrad tuner has been working perfectly, but suddenly the sound is cutting in and out and then completely out. It usually sounds great for five or ten minutes, then it just goes silent and the signal strength meter shows no life. Most all of the tubes seem to be lit, but I was...
    • Moonwatcher
    • Thread
    • calrad fm intermittent tube tuner
    • Replies: 21
    • Forum: Tuners
  23. Ron Brown

    Tube Amp Project

    I found this tube amp project and thought I might build it or something very like it. Has anyone else experimented with this sort of thing? https://www.thingiverse.com/thing:3386380 Added the video:
  24. J

    Magnavox 8602 -10 se and poor man's set up

    I bought the magnavox 8602 for $99 on Facebook marketplace. I bought a broken outlaw rr2150 for $50 that's output wasn't working but The preamp works fine. Got a Technics m6 cassette player for $25. And a pair of Klipsch tangent theatre speakers in the garbage. 2 mids and a dome tweeter...
    • JohnKuz1
    • Thread
    • amp budget cell phone cheap klipsh magnavox tube tubes
    • Replies: 13
    • Forum: Tube Audio
  25. ceylon

    is this raytheon 12AX7A a hitachi?

    "raytheon registered"...is that hitachi? something else?
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