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tube

  1. chchyong89

    Greetings from Malaysia!

    Hello everyone! Thank you for letting me in. I would like to showcase my latest mini 6.5W SET amp that I am loving it very much:jump: I am still learning and figuring how to improve it bit by bit everyday. :beerchug: .
  2. david winter

    Heathkit AA-40 - strange voltages at 6AN8A plates

    Hi, I have been working on a Heathkit AA-40 amp for which I did the following works: - Set to 230V mode (powered at 240Vac). - Surgistor replaced with CL-90 varistor - Tubes: two NOS Sylvania 6AN8A + four good EL34 - All electrolytics and coupling caps replaced - Most resistors replaced (out of...
  3. HawaiianLei

    Fender Schumacher Transformer Identification

    Hello All, I'm not sure if this is the correct forum to post this on so I do apologize in advance. A while ago I acquired a hoard of used Fender cloth wire transformers and have been able to identify most of them. I am having difficulty with is a with a Schumacher EIA code 606-320 PT1114-240B...
  4. VonKuhn

    Solid State Replacement for Hytron 6x5 gt/g tube & Super Slivertone 6v6 G Tube

    Hello, recently I received a Mantola floor radio (Model r-658) And two of the tubes in the circuit have gone bad. I was wondering if there was a solid-state replacement for these two tubes (Hytron 6x5 gt/g tube & Super Slivertone 6v6 G), so I don't have to replace them as often. Thanks.
    • VonKuhn
    • Thread
    • mantola solid state replacment tube
    • Replies: 10
    • Forum: Tube Audio
  5. lattiboy

    Recommendations for a mid-priced tube preamp

    Hello, I’m looking for something a few steps up from one of those FX Audio $50 tube preamps, but still under $500 (new or used). Two outputs would be nice; but not necessary. Also, the ability to run in passive mode. Totally fine with Chinese brands as I’ve generally had great luck with their...
  6. lattiboy

    Tube amp conundrum

    Hi all, I’m looking to bi-amp (had bi-wire there at first!) my Vandersteen Treo CTs and need some help. 1) I have this tube amp, which I think is very good! I upgraded the 6n2 with some gold lion tubes and was quite happy with the performance. However, one of the stock 6P1 tubes gave out and I...
    • lattiboy
    • Thread
    • amp appj appj tube amp treo ct tube vandersteen
    • Replies: 27
    • Forum: Tube Audio
  7. tcdriver

    Power Supply Model C-4PS01 For Use with a McIntosh C-4 Preamp

    McIntosh C-4 Power Supply Design Idea This post presents a Design Idea for an inexpensive power supply to power a McIntosh C-4 Audio Compensator. Early versions of this preamplifier used 6.3VAC to power the filaments. Later versions used an internal voltage doubler to provide a nominal 12VDC...
    • tcdriver
    • Thread
    • c-4 c-4ps01 mcintosh mcintosh c-8 mono power supply preamp tube
    • Replies: 5
    • Forum: McIntosh Audio
  8. ceylon

    bottlehead reduction help

    anyone have PDF manual?
    • ceylon
    • Thread
    • bottlehead diy kit phono tube
    • Replies: 4
    • Forum: Tube Audio
  9. Fausto Danni

    New setup advice – 2240

    I was hoping to drop in for some advice on a good vintage setup. Current "beginner" setup for the last ~10 years: Marantz 2000 Klipsch KG 2.2 Phillips 212 Electronic turn table I have a lead on a Marantz 2240. I'm wondering where I should go from here? How can I mature my setup? Thoughts... 1...
  10. cabsodyinblu

    Fisher 500c Output Transformers

    Hello AK’ers I’ve been on the hunt for months for an original output transformer for my wonderful 500c but no luck on the auction site. Can anybody recommend where I could find a replacement or a rewinding/rebuild service? I’ve tried to reach out to Transcendar but he replied back that he’s...
    • cabsodyinblu
    • Thread
    • fisher fisher 500c fisher 500c 800c output transformer tube
    • Replies: 44
    • Forum: Fisher
  11. James Cox

    Pioneer sx-2000 mode switch

    Hey I'm currently restoring a pioneer sx-2000 tube receiver for a friend and I've ran into a small problem. The mode selector switch is broken and also missing the knob. Not having much luck finding a replacement. Anyone know where I can find one of these and possibly a knob? The switch goes...
  12. tcdriver

    Do Television Damper Diode Tubes Have Any Use In Audio Equipment?

    Do Television Damper Diode Tubes Have Any Use In Audio Equipment? I imagine they could be used as low power rectifiers in a tube amp or preamp power supply. Has anyone used them for such a purpose? I would like to know. Examples: 6AX4GT 6AU4GTA 6W4G
  13. S

    What a find!

    A work colleague of mine unfortunately recently divorced and so has just moved into his own place not too far from me. He's an audio nut as well, and once he's settled wants to build a system with a good record player and valve amp. His father and grandfather were both big amateur audio people...
  14. tcdriver

    Interelectronics Model 85 Consolette Preamp Information Request

    I have an Interelectronics One Hundred amplifier and I am interested in finding out information on the Model 85 Consolette preamp. The preamp was designed to draw its power from either the power amplifier or a stand alone power supply. What I would like to know is: What are the B+ Voltage and...
    • tcdriver
    • Thread
    • consolette interelectronics preamp tube
    • Replies: 19
    • Forum: Tube Audio
  15. David Weaver

    Sansui Model 500: My First Tube Amp

    I've refurbished several solid state Sansui's (AU-555a's AU-888's, QS-1, QS100, 350 to date) but I never had a tube amp to refurbish; until now. Recently, I acquired a Sansui Model 500 that is in pretty darn good shape at least visually. The only thing I can see that is broken is the AM antenna...
  16. C

    Vincent SV-237 Hybrid Integrated Amp. Thoughts on a matching DAC?

    Just got my first tube amp...the Vincent sv-237. It had a tung-sol 12ax7 on the front and two mismatched 61NP on the rears, I think both Russian but the labels were a bit faded so not sure exactly what the rears are. I read the rears should be matched so I'm thinking of getting these...
    • chmsalman
    • Thread
    • 240i dac hybrid integrated moon simaudio sv-237 tube valvo vincent
    • Replies: 0
    • Forum: Tube Audio
  17. Benz

    What was done to this Dyna PAS (1)?

    Greetings, I just picked up a nice Dyna PAS + Dynakit ST-70 combo (my first tube gear, finally). Both units have been restored but I was wondering if the experts here could help me figure out what was done to the PAS as the previous owner wasn't a tech guy and only knew it had been restored when...
    • Benz
    • Thread
    • dynaco dynakit preamp tube
    • Replies: 41
    • Forum: Tube Audio
  18. S

    Marantz 7t with model 8

    Hey all, I'm new to this forum and I hope I'm doing this right! I have recently acquired a marantz model 8(NOT 8b) tube amp. I have never used a tube amp before, so I am in the market for a pre amp. I've done some research and I've found that it is suggested that if one of your units are tube...
  19. RustyShak51

    Heathkit w5m Pros and Cons

    Heathkit w5m 25 watt tube mono amp from 1957 what's the ins and outs and what's to know.
  20. J

    Help reading Amplitrex Tube Testing Data

    Hello all, I've found some of my dream tubes, very hard to find but I have no idea how to read the tube testing data. Can someone help me with this to see if they are matched and good tubes? I know one will "burn out" before the other, but Im not worried about that, I just want to make sure...
  21. REeeericB

    What is this?

    I'm trying to restore a Magnavox 185 stereo tube amp, and I can't identify a capacitor (I think it's a capacitor), anymore because it is charred at one terminal and all the text on it can't be read anymore. I have a Magnavox 175, and am able to see the numbers on it. They are: 240071-6 125...
  22. teddyfreddy

    Update on my Calbest amplifier project

    I ordered some components off of Tubedepot, two capacitors are on backorder as of right now but I have most of what II need. I also found 2 NOS 5AR4 Toshiba tubes on Ebay.
  23. mrk229

    EICO HF-89 Power Supply Modifications?

    Greetings. As noted in many places the EICO power supplies were mostly built to a just adequate specification. I am currently rebuilding an HF-89 and want to upgrade the power supply. Looking at various threads here at AK and other places has given me some ideas and they are presented in the...
    • mrk229
    • Thread
    • eico hf-89 power supply tube
    • Replies: 10
    • Forum: Tube Audio
  24. sheiku

    noob question: mixing tube preamp + ss amp

    Hi to all, and glad i am part of this wonderful forum. Dan here, After many year of using only ss amps i want to enter with timidity in the word of tube: I own only ss amplifiers and very big and inefficient speakers i cannot drive them only with tube amplifiers - as Quadral Vulkan mk2 (8 ohm...
    • sheiku
    • Thread
    • buffer preamplifier tube
    • Replies: 11
    • Forum: Tube Audio
  25. artsybob

    Westie Console Right Channel Issue

    Lately the right channel of my Westinghouse tube console stopped working right. It was fully serviced a little while back (new caps, some new resistors, bad tubes replaced). It was working fine for awhile but now the right channel has cut out, sometimes I get some intermittent staticky noise...
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