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tubes

  1. RogerMod

    Burning Amp 2018, Fort Mason, CA

    We had a nice turnout this October in San Francisco. Thanks to all the DIYers who brought their work to show off. Thanks to Linear Systems, makers of really low noise FETs and other SS devices, for hosting the event. Here is a link to their site. All the presentations can be seen there. See...
    • RogerMod
    • Thread
    • bias class a class ab idle current power output tubes
    • Replies: 5
    • Forum: Tube Audio
  2. lopezluna

    Fisher model FM 200-c tube tuner anyone know anything about them?

    • lopezluna
    • Thread
    • fisher fm 200-c tubes tuner
    • Replies: 12
    • Forum: Fisher
  3. RogerMod

    Burning Amp 2018 is at Fort Mason , SF, CA 9/30

    http://www.burningamp.org/ Nelson Pass will be speaking on his latest Solid State efforts, as always. I will be speaking on tube applications in preamps and and "not in the book" power tube applications like the RM-10. Have a look at the webside and join us. Thats Sunday 9/30th
  4. Kingsin7

    Mcintosh MA230 Bias Voltage

    I've begun to notice a slightly louder than usual hum coming from my Mac MA230 that I use daily in my office setup. It has been about a year since I last reset the bias, so I decided to take it out of it's wood case today to make adjustments. After reviewing the manual, a voltage of 0.7v is...
    • Kingsin7
    • Thread
    • bias bias adjustement mcintosh tubes
    • Replies: 20
    • Forum: Tube Audio
  5. caferacer59

    new to tubes, heck new to hi fidelity.

    So, after being depressed about being a 55 year old guy who loves music and was listening to a crappy play 3 sonos speaker I finally manned up and perused craiglists for a few weeks, I ended up buying a Pioneer SX-750, and then a pair of Klipsch KG-4's. Its a rocking combination, that could...
  6. friedtwinkie

    Fisher 800c original tubes

    Hey all- I’m new here. I got lucky and scored a fisher 800c at an estate sale last weekend. I’m thrilled. I just removed it from the wood cabinet and already have a couple of questions. 1) looks like it has all original tubes. If no issues with tubes should I look to replace anyways? 2) I’m...
  7. R

    Adding tube influence to a solid state Phono

    Hi so I want a tube preamp I have a great sounding Yamaha CR420 I use my turntable more than any other source. I think I have narrowed my selection to an Phono preamp (tube) ...or a preamp buffer (tube) that has knobs for EQ I want to know which is preferred and where to put it in the...
    • Ryan Case
    • Thread
    • phono pre amp pre amp help preamp tube tubes
    • Replies: 3
    • Forum: Tube Audio
  8. markshan

    Pittsburgh "Mini Swap" - July 7

    Some of you may have attended the swap meet/sale in Natrona Heights for the last couple years. A great time was had by all and lots of really nice equipment changed hands. The garage is not available this year, but one local audiophile will be hosting a slightly scaled back version of the...
  9. Tubeglowpio

    Rh84 built, first impressions

    So I got around to finishing the rh84 build, it was built as the circuit describes besides some power supply tweaks and plate voltage ended up around 276 volts. Cathode current ended up being around 34 ma so only dissipating about a little over 9 watts. I also added a 100k pot on the input and...
  10. axel340band

    Best indoor antenna for suburban area

    Hi, I live just outside Philadelphia(less than 10 miles), and am looking for a good indoor antenna. My apartment is on the second floor of an old brick house, so a lot of stations aren't the strongest, even though they come through perfectly in the car. In particular, I tend to listen to 90.1...
  11. kcline

    Space-Tech Lab. Line stage pre-amps QA-001 & QA-111-U

    PleaseSee pictures. Had these for a long time. Have a great story that came with these. Gentlemen I got these from told me he was a professional tube listener for Conrad Johnson and other companies he had all CJ equipment said it was top of the line. He needed 7 Telefunken 12AU7 used tested...
  12. nickdinatale

    Looking for help testing a Western Electric 306A

    I recently picked up a box of assorted tubes at a flea market and had a pretty exciting find in it - a US Navy branded Western Electric 306A that looks pretty promising. With the value of the tube, I'm not willing to take a chance at testing it with the wrong settings, so I'm coming here for...
  13. cocovinyl176

    What tubes are you running with your Dynaco ST70

    Hi-Curious what some of you with (stock) ST70's are using for tubes. Are there specific Tubes any of you find deliver best sound quality? Does having the Original transformers without it upgraded somewhat limit options? Look forward your replies.
  14. cocovinyl176

    Trade MC250 SS for Dynaco st70 Tubes?

    Hello all, I know some of you will be bias in one way or another regarding SS vs Tube, but thought I'd throw this out to the AudioKarma world to gather some thoughts. A trade: Mcintosh MC250 for Dynaco st70 Both units are cosmetically 9/10 with zero rust or pitting Both units are in its...
  15. F

    Tubes for Unison Research's Simply Italy?

    Hello there. I own a Unison Research Simply Italy, which I adore. It uses two EL34 and two ECC82 (12au7) as rectifiers. So recently I decided to upgrade the 12au7's. After doing a lot of research, I went with the Psvanes. Right out of the box the sound was clearly more open and detailed than...
    • fedocable
    • Thread
    • 12au7 biasing ecc82 psvane simply italy tube amp tubes unison research valves
    • Replies: 2
    • Forum: Tube Audio
  16. R_F

    Things you should know about tubes — Robert Tomer

    Something may have changed since 1960. If so, please correct anything that has with direct sourced evidence. I made screen captures from parts of the book to try to focus mainly on the most relevant bits to audio. I edited out extraneous stuff like references to figures not shown. I did this...
    • R_F
    • Thread
    • bias cathode fixed longevity tips tomer tubes
    • Replies: 33
    • Forum: Tube Audio
  17. NCSU_Pi

    Advice on Value of RCA Victor 3VF516

    Hi folks, We have an old RCA console stereo from my grandparents' house that we've been using as furniture and media storage. From what I've read, the amp in this thing is well regarded. However, I'm not sure it's functional, as we haven't even had it plugged in. Here's a photo gallery in...
  18. cocovinyl176

    Mcintosh p153 & p155

    Happy new yr. I have been trying to find information on the McIntosh pre/amp p153 & p155...but have come up empty. Can any of your shed a bit of information regarding the two? much appreciated.
  19. fink lever

    Valve Amplifier valve identification

    Hi all and merry christmas!!! I currently have an unusual custom vintage hi fi cabinet that i would love to get up and running. Looking at the unit it seems to be a 'Main Amplifier, an AM Radio Amplifier and FM Amplifier.' Lots of valves and transformers and not built for power but detail as it...
    • fink lever
    • Thread
    • 1940s homebrew push pull radio single ended tubes valve amplifier valves vintage wireless
    • Replies: 117
    • Forum: Tube Audio
  20. JPJ

    fell into a crazy tube system but can't keep everything, looking for advice on best way to upgrade

    Kind of a long story and wasn't sure where to post. I'm new to posting on the forum (have used it as a resource plenty) and have always used a low budget setup at home. I've had and really enjoyed an HK 730 paired with kef Carlton iii's. Audio is either coming from my technics 1200 mkII or...
    • JPJ
    • Thread
    • harman kardon hk730 kef mcintosh technics 1200 tubes upgrade
    • Replies: 7
    • Forum: Members' Systems
  21. B

    Pye PF91 Tube/Valve Amp

    First post and looking for some direction. I just came across a Pye PF91. My research points to a 1954 era unit. It came with the PF91A unit as well as a Gerrard phono player. I'm looking for help on the amp. As this is my first venture into vintage, I'd like to know more about the unit. It...
  22. lattiboy

    Leslie (Tung Sol) 5660 matched tubes

    Hi all, Was messing about with a Leslie 145 cabinet speaker the other day and I noticed the tubes in the amp were in ridiculously nice condition. Apparently organ amps are very easy on tubes, and it looks like this amp had very little use. Now, I know NOTHING about tubes except for my...
  23. ScooterMcTav

    Tube Pre vs. Tube Power amp - my experience

    So as a relative newcomer to tubes, I was thrilled with the Jolida JD-302brc integrated I received in trade from another local enthusiast. Compared to every piece of SS gear I had ever owned, I could not believe the clarity of sound my system now delivered. Vocals had an immediacy I had never...
  24. ScooterMcTav

    Emerson Consoles - Yes, No, Maybe?

    Hi All, A Console recently came available locally, and the seller states it is tube. I don't see the words solid-state anywhere, so will make the assumption he has it right. Looking at the item, it's not especially visually appealing, and the TT doesn't appear branded, so I'm not sure that...
  25. PaulFerrell

    Early 1950's RCA console

    Just found and bought an early 1950's radio, Phonograph, and Tape player. My profile picture. My problem is that I like the way it looks and I want to be able to hear the sounds she still has but I don't know where to start. The phonograph and tape player of course are missing. The radio is...
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