tubes

  1. Matt The Cat

    MA2275 Phono Stage Interference Help - Stumped!

    Hi, I'm stumped and I really could use some advice on how to fix possible RF, EMF or grounding issues on the phono stage of my MA2275. It was just in the shop for 2 blown transistors controlling the bias of one of the KT88s. That issue was fixed, but as soon as I hooked it up, I noticed a...
  2. TubieNewbie

    Conrad-Johnson MV55 Triode Mod

    I was reading the manual for my MV55 amplifier and it mentioned that my amp can be modified for triode operation. The following is an excerpt from the manual: Optionally, the MV55 may be reconnected internally for triode operation of the output stage, for exceptionally musical performance, but...
  3. kcline

    CC-AWA Jamestown NC Tail Gate Meet 11-2-2019

    At City Lake Park Jamestown NC Gate opens around 7:00AM meet over around 11:00AM there be some audio and tubes and radio and ham and more, at this meet not a big meet but the weather looks good. PM me if you need more info.
  4. AlexHempel

    Compiling a list of tube amp kits

    I'm interested in building a tube amp kit but finding good information is quite a slog, since mentions of the various kits are scattered across many threads, and there's no way of knowing when you've discovered all the kits that are out there. I strongly prefer to compare every possible option...
  5. kcline

    Early Version Fisher 400-C Preamp Owners Manual

    I have a Manual for the 400-C that is for the version that has dual-tone controls and shows the "Output Selector" as stereo reverse, stereo standard, channel a+b, channel b+a, channel a, channel b. Mine has single tone controls, then the output selector goes the same on the first two then...
  6. Tubeglowpio

    Magnavox 8601 back on bench questions

    Hey guys, so the Maggie 8601 was the first tube amp I ever rebuilt with only the original iron and all new parts. This was about 3 or 4 years ago now and I quickly moved to building other audio gear but I always felt that the Magnavox should have sounded a little bit better, I did modify the...
  7. kcline

    New to me Klipsch Cornwall Speakers

    I owned of pair of these back in 1980 in Birch sold them around 1985, I have always wanted another pair and here they are. I was glad to find out that my Fisher 400-C pre. and SA-100 amp are quiet, never had a horn system connected up to these.
  8. MotherSauce1

    Small Footprint Low Watt System

    Howdy, I've always liked the sound of efficient speakers and low watt tube amps. A few years back I sold my long-enjoyed pair of Klipsch Heresy (haters please refrain from posting). I admit, I miss the system but parted with it mostly due to size. I live in the city, in an apartment. I've been...
  9. UncleBingo

    This is kind of cool. Glassworks at the new WE plant

    No Affiliation.
  10. HiMcDunnough

    grounding issue with "Pro-ject tube box se ii" phono stage

    hi all Here's the setup that I'm having problems with Pro-ject phono stage (12ax7a) Lector ZOE preamp (no phono stage), (Telefunken 12au7 tubes) Adcom GSA-555. - I've been using a Cambridge 651p (budget ss phono stage) with zero problems. - the pro-ject works as it should for five minutes...
  11. kcline

    New to me another Fisher 500-B Ser. number 12154-C

    This came from work, auction house two weeks ago. From a antique radio estate I told the family you would have wished Jim collected audio instead of radios when this sells. Seems to have all fisher tubes the fisher marked 7591-A tested good on my matcher. Has a pair of Made in Holland 12AX7...
  12. kcline

    Using Fisher 500-C Bi-Wired Driving Infinity Kappa 7.1 speakers

    These speakers like more power then the 500-C has, however connected bi-wired sound great played Kate Wolf what a great voice then played Bauhaus bela lugosi dead had to turn it up about 3/4,s but had good bass and played it well. I like this setup so much I may make a better set of cables and...
  13. Squidward

    Kegger Schematics Mega Thread

    I'm going to start this thread with a specific aim: To preserve the knowledge that Kegger freely gave our community. This thread is for posting schematics that Kegger created. He designed some very popular amps (KT-88 SEUL, for one), but he also has some lesser known designs that shouldn't...
  14. thorpej

    A message from The Electron Tube Information Council

    Just leaving this here for your enjoyment. http://www.rcaselectron.com/TNT.html (Oh how I would love to find an original copy of this.)
  15. Matt The Cat

    Tube Issue on MA2275

    Hi all, I noticed the other night as I was going to turn my MA2275 integrated tube amp off that the tube cage was WAAAAY too hot. I determined that the front, left KT88 was extremely hotter than the other 3 KT88s and also smelled bad. I immediately shut the amp off. Next day, I turned it on...
  16. kcline

    Tube oddies from the Dowd-RCA Archive AWA Museum from the TCA

    I am a member of the Tube Collectors Association. I am also a member of the board. Our President Ludwell Sibley had these archives in his possession for many years for study, as I have time I will post some audio related items. First up is the RCA list of Private Brands that RCA marked on tubes...
  17. kcline

    United Electronic Co. JAN CUE 845 VT-43 Tubes

    I was helping out an old friends estate for the family, he was a big radio, test eq. and ham radio collector. His tube collection was almost all radio tubes, but in the bottom of box were these. First 845,s I have found in about 20 years Nice to see these and they have good filaments I cannot...
  18. kcline

    New Preamp for Main Systems

    Just in last weekend PrimaLuna DiaLogue Premium Pre-amp, replacing in this room my ARC SP-9 MK-2 and Jolida Pre. Much better sound then either pre Deeper and wider soundstage with more detail. Still need to connect to Polk Audio SRS speaker thru the Harry Gates Mem. amp, but have to move the...
  19. 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...
  20. lopezluna

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

  21. 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
  22. 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...
  23. 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...
  24. 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...
  25. 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...
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