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tube amplifier

  1. oldschools

    Looking for a vintage tube stereo restoration shop in the San Jose area

    Hey everyone, I've been a member for years but not very active on posting…mainly reading. I was fortunate a few years back to pick up this handsome mid-century JBL system at an estate sale. Includes a pair of JBL C50 Olympus S7 speaker systems, a JBL C58 Delphi cabinet, housing a Scott Kit...
  2. M

    Hilarious lost in translation via AliEx

    Ultra-low noise floor, listen to music, restore HIFI High-fidelity sound quality, full of strength, whether it is symphony or HIFI music, it can express every detail and move people's hearts. Features a variety of digital audio inputs: Stereo RCA, compatible with most audio devices, such as...
  3. D

    Refurbishing Seeburg M100C MRA3-L6 amplifier. Need help with a few caps.

    Hello, I am new to the tube/jukebox world and am replacing all the capacitors on my Seeburg M100C MRA3-L6 amplifier. I have 4 capacitors that are in question. Can anyone help me figure out which caps these 4 are? I think one of them is C25? And maybe another is C15? Not sure what the other 2...
    • denimdan
    • Thread
    • capacitor jukebox m100c mra3-l6 seeburg tube amplifier
    • Replies: 5
    • Forum: Tube Audio
  4. happybear

    Manifesto SE ... a single ended tube amplifier project

    Manifesto SE ... a single ended tube amplifier project by HB. The physical layout is breadboard-minded, with exposed signal circuits connected to the power supply via umbilical connectors. The power supply is a LOW DCR "flywheel" type with 250VA Hammond ICT as the main B+ transformer. The...
    • happybear
    • Thread
    • 6aq5 6v6 7c5 low dcr se tube amplifier
    • Replies: 51
    • Forum: Tube Audio
  5. zxc

    just curious on this amplifier

    anyone know tube type and the brand of the tube?
    • zxc
    • Thread
    • tube amplifier
    • Replies: 12
    • Forum: Tube Audio
  6. kurorin

    Handmade in Japan LCR RIAA Phono Tube Pre Amplifier & 12AT7 Kind of Valves

    I´m starting this thread to share my experience about two topics: 1. A new valve RIAA Phono Pre Amplifier, working on LCR technology that we will explain. 2. Alternative valves for the popular 12AT7 that brought me a new sound (and aesthetic surprise). Disclaimer: Im writing this post as a...
    • kurorin
    • Thread
    • kenji mizushhima lcr phono preamplifier porco rosso riaa tube amplifier valve amplifier
    • Replies: 45
    • Forum: Tube Audio
  7. david winter

    Olson stereo amps & docs ?

    Hi, It looks like there's little technical information about Olson tube amplifiers. I'm trying to go through an unidentified model equiped with a 5AR4 rectifyer, four EL84 PP and 5 12AX7 (all testing good). There's some residual audible ripple after recaping the power supply whatever the...
  8. happybear

    SE Tube Amplifier : Project Preview ...

    This SE tube amplifier project is currently a work-in-process. The PT came from a Westinghouse phono console that supported (2) 6V6, a few 12AX7's and a 5Y3 rectifier. On order are (2) NOS AES PT-31 SE 5K/8 OPT's. No final decision has been made regarding the signal circuit on this project...
    • happybear
    • Thread
    • aes pt-31 dg se1 magnavox se tube amplifier
    • Replies: 17
    • Forum: Tube Audio
  9. Panpanculcul

    Help with mystery tube amp, , who made it?

    Hello guys, just got this tube amp in an estate sale but there is no name anywhere. This is the best place anywhere to ask that! you already helped me in the past and I am sure someone knows about this one. Thanks in advance!
  10. Panpanculcul

    Is this a Monoblock tube amplifier & who made it?

    Just got my hands on this nice piece, came from a collector estate but I do not know nothing about it. Went online but the only one who look's like is the Heathkit W-1 or W-2 or W-3M? I am sure someone knows about it on AudioKarma. Thanks in advance!
    • Panpanculcul
    • Thread
    • acrosound to-300 heathkit monoblock amplifier tube amplifier
    • Replies: 6
    • Forum: Tube Audio
  11. W

    Reisong Boyuu MT-88 MKII KT88 Push Pull Tube Amplifier

    I was hoping that someone that owns one of these could comment on whether it uses a circuit board or if it is point to point wired. The description of the MT-88 says: Hand welding point to point. Features: Handmade scaffolding welding, there is concise and easy process, traces short, simple...
    • wag12
    • Thread
    • boyuu chinese kt88 reisong tube amplifier
    • Replies: 31
    • Forum: Tube Audio
  12. N

    Mysterious Ambassador Console. Is it Fisher? Need help.

    Hi My guess was that this is Fisher Ambassador IV. Picked up, but didn't found no one word Fisher nowhere :(. What is it? Anybody can help? Schematics? Tuner/preamp - Chassis 9058-A MX4 FM adapter Chassis - EIA code 1035 Power amp Chassis - not sure 12" AlNiCo Carbonneau woofers Oxford metal...
  13. H

    DYI tube amplifier

    HI all. I'm interested in building a tube amplifier and a preamplifier. I have experience soldering but that's about it. I'm wondering if there is any good quality dyi kits that I could purchase and put together myself. Thanks in advance.
    • Hifimex
    • Thread
    • dyi tube amplifier tube preamplifier
    • Replies: 16
    • Forum: DIY
  14. txc500

    Stromberg Carlson Stereo 6 / ASP-60

    I got a console stereo that I am retrieving the Stromberg Carlson components from, tuner, ASE-6 preamplifier, ASP-60 power amplifier. Currently still in the console, the preamplifier master gain / on - off switch controls the power to the amplifier but the volume is loud at any setting, it...
    • txc500
    • Thread
    • ase-6 asp-60 stromberg carlson tube amplifier
    • Replies: 20
    • Forum: Tube Audio
  15. Brice

    The beastly beast Allen Organ C-3

    Hi All, I've just finished to restore another beast: The Allen Organ C-3, AKA Allen Organ 60. I found one, and then it took me some time to get a second one to be able to make an identical pair. Here is how they look like: Very little info on that beastly beast. Date: unknown...
    • Brice
    • Thread
    • 6au6 6l6 allen monobloc organ tube amplifier
    • Replies: 84
    • Forum: Tube Audio
  16. lopezluna

    Need help identifying the value of this resistor please.

    Hello fellow AK'ers. I need help with this resistor value please. My eyes cant distinguish the color on one of the bands therefore I cant order the resistor. Any help would be greatly appreciated. I do have a picture of how to look up resistor values but I the problem is my eyes wont cooperate...
  17. S

    Voice of Music VM 804 Console / 1223 Turntable / 20037 Amp Rehab

    Hey All, I picked up the VM 804 console a few years back from Audio Archaeology in Chicago (https://www.audioarchaeology.com/vintage-audio) as a gift for my wife. I fully expected that it wouldn't work and I'd have to do some work on it, but I was pleasantly surprised to find out that it...
    • sruncorn
    • Thread
    • console tube amplifier turntable voice of music
    • Replies: 4
    • Forum: Tube Audio
  18. Gary Mattis

    Bogen CBH 100 Mono blocks, update !

    I posted it a few month's ago and I had a few problems with one of the the amplifiers after a couple of weeks. And I changed V1 in both to a 12AU7 instead of the 12AX7 that I first used to replace the 6EU7 that it comes with originally. The tape player needed more gain than the aux 1 or 2 had...
  19. Kreshna

    Why are chip amps often described as having "tube sound"? What are the similarities between them??

    Alright, I often read chip amps being described as having sound similar to that of tube amps. Why? Are there really similar characteristics between chip amplifiers and tube amplifiers? And if there are, what are they? This one is an example: I have -- deliberately I might add -- refrained from...
    • Kreshna
    • Thread
    • chip amplifier gainclone kreshna aryaguna nurzaman set single-ended triode tripath tube amplifier
    • Replies: 66
    • Forum: General Audio Discussion
  20. T

    How to restore an old tube amplifier ?

    So I have quite a few old tube amps (mostly philips) however they are all mostly original (inside) and while most of them do work I feel like I should try and get them to sound as good as possible. So what should I do ?
  21. M

    Chinese 6J1 Fever

    so I ordered a cheap tube amp and built it. I get sound but it is distorted. Any ideas as to why?
    • Miketubes
    • Thread
    • chinese chinese diy kit tube amplifier tube amps tube preamplifier tube preamps
    • Replies: 13
    • Forum: Tube Audio
  22. I

    Please help!

    So I am extremely new to building tube amplifiers. I've never done this before, but this concept intrigued me alot, therefore I decided to build one. I followed a schematic of a 20W pc tube amplifer. To my knowledge, and to checking my work multiple times, I have followed the schematic...
    • ilya__
    • Thread
    • amplifier noise preamp noise tube tube amp distortion tube amplifier valve
    • Replies: 22
    • Forum: Tube Audio
  23. ETQuall

    Bogen PAs to home stereo

    Uh, long time listener, first time caller... Bought two of the Bogen CHB-35a PAs off of a popular auction site (schematic attached). Took awhile to get two of the same at decent prices, but I DO love when churches decide to upgrade their audio systems. End-goal is to have a nice home stereo for...
    • ETQuall
    • Thread
    • bogen hi-fi monoblock amplifier parallel triode tube amplifier
    • Replies: 4
    • Forum: Tube Audio
  24. bikingbuddha

    How good is this tube...?

    About a month back i came across a little tube hybrid made in china called Sherwood DT-555. I call it the "Tube amp from another dimension" because it's existence is completely unknown to this world. I have even posted about it on Headfi & Audiokarma and i still couldn't find anyone who has seen...
    • bikingbuddha
    • Thread
    • 6n3 6n3 compatible sherwood sherwood china sherwood dt-555 tube amplifier tube amplifier from another dimension tunsol 2c51 warm sound
    • Replies: 3
    • Forum: Tube Audio
  25. rene grondin

    Angella amp 2 rect.tubes

    I found this and i was wondering if it is worth to put 2 rectifiers in paralel?
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