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tube

  1. NewRetro

    My sincere apologies to my KG 5.5s

    "I would like to publically apologize to my 5.5s. I had fallen out of love with them. I spoke ill of them for what I perceived to be their lack of midrange and lackluster performance at low volumes. This week a friend gave me my first ever tube amp - a modified Magnavox console amp. I was...
  2. Ashutosh

    Help in restoring Philips Prestige vintage tube radio.

    Dear All, I have this Philips Prestige Vintage Radio model no 15RB 525/11z. It is in working condition but it has some loose connection as it stops working frequently if it is moved a little bit. I am planning to repair it. If any of our forum members have the service manual/schematic of the...
  3. angelaudio

    Yard Sale Find - Zenith TPS47C

    Hello AK’ers I came across this beauty today at a yard sale. I’ll discuss price and all that in the dollars and sense section and you all can state your opinions on it’s value there but I just wanted to discuss function and beauty here. It’s a 1964 Tube powered model and it works surprisingly...
  4. cocovinyl176

    PrimaLuna Premium HP or Music reference RM-200

    Torn between purchasing one of these two amps. I’ve read great things about both. Anyone have any experiences with both or either? Placing aside (which may Be hard to do) the applications you’re running themnwith, what do you guys prefer? Understand the MR is hybrid, the PL runs triode and...
  5. amirnir

    Akai 1700

    Hi! I tried to turn on my Akai 1700 reel to reel deck, and it doesn't seem to produce any sound (mechanically it obviously works, and the tubes are on). This unit has been in storage for almost 5 years. I found the service manual and one of the options for failure there refer to a 250K 1/2 P...
    • amirnir
    • Thread
    • akai 1700 akai reel player reel-to-reel tube tube reel-to-reel
    • Replies: 0
    • Forum: Tape
  6. MKG

    What is this?

    I won this lovely rust bucket and a variety of rusty tubes in an auction for AK. Now I need to figure out what it’s purpose is, as well as manufacturer and model number, and find a schematic. There’s only one transformer so with my limited knowledge I’m thinking preamp? Under the rust I can see...
    • MKG
    • Thread
    • rusty tube unknown
    • Replies: 14
    • Forum: Tube Audio
  7. C

    Fisher 70rt Tuner Preamp Selenium Rectifier

    I have a nicely working fisher 70rt but I’m concerned about the selenium rectifier overheating. It plays fine so don’t want to mess with it if I don’t have to. I’ve replaced a selenium rectifier in a Dumont am fm tabletop radio with great success. However looking at the diagram for the fisher -...
    • Chris J
    • Thread
    • 70rt diode fisher preamp rectifier selenuim tube
    • Replies: 17
    • Forum: Tube Audio
  8. L

    Grundig SO 240 U/S

    i have this console that I don’t know what to do with. I tried getting it fixed (I’ll post everything from the shop) and no luck. I’m thinking of retrofitting it, but I don’t know what components I should put in it. From the shop Here is what the shop tried to fix on it. 1- Cut out wood...
  9. Beeb

    Worth of McIntosh 1500

    What is a fair price for a McIntosh 1500 that sounds good, has been totally recapped, is all but mint cosmetically (in a wood case), and has both three of its original tubes and a spare set of four later era tubes for a total of 8. (Sorry, don’t know the strength of any of these aside from the...
    • Beeb
    • Thread
    • mac mac 1500 mcintonsh mcintosh 1500 receiver tube
    • Replies: 12
    • Forum: Dollars and Sense
  10. kcline

    RCA Engineers Test Telefunken 12AX7 Tubes against Their 12AX7

    From Dowd AWA Holding from TCA from Ludwell Sibley. In 1962 H. W. McCord Tube Engineer wrote an eight page " Coded Engineering Letter 653-#806" titled "Flicker Noise Test". Flicker noise is a very low frequency type noise. RCA was getting complaints about this. RCA compared RCA 12AX7 to the...
  11. yardlad

    Vintage Magnavox - REDUX - Help?

    Hey Everyone, I have a 1950's Magnavox 477P (I think) entertainment console - TV, radio, turntable. My mom told me it died before JFK due to a lightning strike near her parents' house. I pulled the chassis out and cleaned it up a bit.. There are a lot of different tubes. The only ones...
    • yardlad
    • Thread
    • 6l6 6l6 gb tubes amp custom custom tube amps electronics guitar magnavox 477p tube vintage
    • Replies: 3
    • Forum: Tube Audio
  12. WillRobinson

    Kenwood KW-60 - Reclaiming the Mouse House

    Good evening! I recently saw an ad on CL for a group of stereo components, mostly Sony gear from the '90s, but among the pictures was an intriguing looking receiver peeking out from a wooden console. I could tell Immediately that it was an early tube Kenwood, although unsure of the exact model...
  13. Mike Sweeney

    Has anyone built one of these?

    I found this and it is really, really appealing for a spring project. I have a real vintage untouched Fender Champ but this looks like will be a better match for what I want. Not to mention I think it would be a ton of fun to build vs my normal restro work...
  14. ssouci

    crackling/static noise in one channel (X-202)

    I've suddenly started hearing a crackling/static noise in one channel of my Fisher X-202 integrated amplifier Description: - sound is an uneven "crackling/static" noise, NOT smooth white noise - in the right channel only - not too loud, however loud enough to be heard in a quiet room once music...
    • ssouci
    • Thread
    • channel crackling noise noisy one channel static tube tube amp distortion x-202 x202
    • Replies: 5
    • Forum: Fisher
  15. noiselectro

    Can someone identify this mistery... ¿amp?

    Hello. I' just got this component, and I'm not sure if it's a radio, a preamp, or and amplifier. No brand name or model. Can someone identify it please? Thanks in advance for your replies.
  16. TheWolf82

    Sony TC-200 Reel To Reel Concerns - HELP

    I just purchased a Sony TC-200 Reel to Reel. It is in great shape however it didnt come with the speakers. There is actually a speaker built into the unit itself. I powered it up and it seemed fine however it has a slight smell to it...I'm not sure if its just because it hasnt been used for a...
    • TheWolf82
    • Thread
    • hybrid amp issues loud reel to reel sony tape tube
    • Replies: 2
    • Forum: Tape
  17. Tubeglowpio

    Kegger/blueglow kt88 project

    Happy new year everyone! I've been really busy but have wanted to build the Kegger se kt88 for awhile now and after seeing blueglows youtube videos I'm sold. I enjoy my 5 watt se builds but have a party coming up this spring and need more power so am ready to get started but have a few...
    • Tubeglowpio
    • Thread
    • amp blueglow kegger kt88 se single ended stereo tube
    • Replies: 1,852
    • Forum: Tube Audio
  18. trainbuftony

    The "Members Only" Riaa Tube preamp. Gets a walnut cabinet)

    Preamps, a controversial subject, where does a person start? Well suffice to say I'm not convinced that I own the best, and i'm not convinced I ever will. After several experiences building and modifying preamp stages I feel like I have a grasp on what sounds good and what I like. Please bear...
    • trainbuftony
    • Thread
    • diyaudio point2point. preamp riaa tube tube amp tubepreamp turn table vinyl
    • Replies: 61
    • Forum: Tube Audio
  19. kcline

    Just in Restored Fisher 500-C and a Surprise!!!

    The surprise is Two!! restored 500-C. I gave the two 500-C to my good tech friend told him to restore the pretty one and if needed use the butchered one for parts. Both 500-C came from the same collection bought years apart. The nice one SER # 74006X was the NC Fisher distributors personal unit...
    • kcline
    • Thread
    • fisher telefunken tube
    • Replies: 8
    • Forum: Fisher
  20. artsybob

    TFM-300 Suddenly Stopped Working

    Last Spring I fixed up a TFM-300 tuner (replaced all electrolytic caps, had everything else tested) and for several months it worked perfectly with no incident. A couple of days ago while tuned into a station playing Christmas music the signal faded out and now I just get static. It doesn't pick...
    • artsybob
    • Thread
    • fisher hybrid solid state tfm-300 tube
    • Replies: 6
    • Forum: Fisher
  21. funhungryman

    NOS Gold Lion KT88s

    I bought a truckload of tube gear about a decade ago and in the lot were 6 Gold lion KT88s made in England....I have some nice gear but I am not sure I should use these, rather passing them on to a shop or other more “skilled” user and reinvesting the proceeds in my system. I am in pretty...
  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. kcline

    Picked up two new pairs Yamaha NS-344 & KEF 102 Ref.

    Both sets came from work {Auction House} in the last few weeks. Both work well with tubes amps I have played them with. The KEF needs more power and they are 4 ohm rated but still played well connected to my HH Scott 299-C amp 4 ohm tap. On a few CDs I played I had to turn Vol. up to about 2:00...
    • kcline
    • Thread
    • kef tube yamaha
    • Replies: 2
    • Forum: Speakers
  24. B

    Bell Sound 2418 - bringing it back.... Advice?

    I was asked to take a look at a Bell Sound 2418 integrated amp to see what it would take to get it back into service. A little background -- over the past 30 years I've taken care of the care and feeding of a Dynaco ST70 and PAS3X. Also brought 2 other ST70's and PAS's and a SCA35 back, but...
  25. zim bida

    What Fisher Case Did I get accidentally?

    Hi Everyone, I hope folks can help me out with this. Recently I purchased a Scott 355 preamp/tuner and it came in a case that wasn't it's own. I posted a picture of this in the Scott facebook group and received a message from another user that his 355 had come in the exact same case, which he...
    • zim bida
    • Thread
    • cases fisher scott 340 scott 355 tube
    • Replies: 8
    • Forum: Tube Audio
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