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  1. #871

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    A voice matched center chan for the 3 ways no?:D

  2. #872

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    LOL! :D

    I may gut it, sand it down, refinish it, then put a chip amp in there with some spare drivers and use it for background music in another room.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche

  3. #873

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    Oh no...you have TONE Control in there.
    Trying out Different Audio Cables is a Religious Affair. You don't discuss it with anyone.

  4. #874

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    it's toots!
    Tell us of its amplifier...
    all the best,
    mrh

  5. #875

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    Has a decent tranny, 2 Raytheon 6V6GT's, a Sylvania 6AN8, and a no name 6X4. Haven't attempted to fire it up, AFAIK, it hasn't been used in years.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche

  6. #876

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    This fine Asian lady is a Nakamichi Stasis i'm working on (she has lost half of her voice!). Looks brand new on the inside, not a speck of dust. Nelson Pass design, i'm rather impressed with the build

    e: btw if anyone has a schematic for this let me know
    Last edited by sm88; 10-22-2010 at 08:16 PM.

  7. #877

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    That STASIS gear is solid....always a winner and fairly unique.

  8. #878
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    Hello,
    I just finished a pretty thorough sprucing up of my home brew preamp that I made a few years ago. I hadn't done this in quite a while, lots of the power supply connections needed taking apart and "Flitzing". I replaced the three tubes in the high level stage and checked the adjustable filament supply. It was very close to being right where it should be. I polished all of the RCA inputs and outputs and the faceplate and knobs. I also checked all of the caps in the power supply and none were showing any problems on the ESR meter.
    Enjoy, Ken
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    Last edited by Kenneth Swauger; 10-28-2010 at 01:08 PM.

  9. #879

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    Quote Originally Posted by sm88 View Post


    This fine Asian lady is a Nakamichi Stasis i'm working on (she has lost half of her voice!). Looks brand new on the inside, not a speck of dust. Nelson Pass design, i'm rather impressed with the build

    e: btw if anyone has a schematic for this let me know
    Lots of talk over in both the Pass Labs forum and Soild State forum at DIYAUDIO.com

    They can help w/schematics, advice, etc.

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

  10. #880

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    Quote Originally Posted by Kenneth Swauger View Post
    Hello,
    I just finished a pretty thorough sprucing up of my home brew preamp that I made a few years ago. I hadn't done this in quite a while, lots of the power supply connections needed taking apart and "Flitzing". I replaced the three tubes in the high level stage and checked the adjustable filament supply. It was very close to being right where it should be. I polished all of the RCA inputs and outputs and the faceplate and knobs. I also checked all of the caps in the power supply and none were showing any problems on the ESR meter.
    Enjoy, Ken
    Looks good to me, sir!

    Ken, did you see the Mark Deneen-designed ADC preamp that passed through my quarters a few years back? Your preamp's internals reminded me of it (the ADC was sheer overkill, with constant-current active loads on all the signal-handling tubes).

    http://www.polkaudio.com/forums/show...&postcount=139

    sorry the photo's so big (and the innards were so dusty)...

    all the best,
    mrh

  11. #881
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    Thanks, Mark.
    I built this about 20 years ago and outside of the normal tube changes there's not been a moment's problem. Of course, now that I say that it'll blow up. The power supply is based upon a 1981 article in Audio Amateur by Brian Clark. There are no series resistors, each of the three B+ are individually regulated with pass transistors and zener diode references. He raises the current flowing through each zener to reduce it's dynamic impedance. The result is a highly regulated low impedance power supply. I couldn't measure any ripple on it, pure DC.
    I paid a lot of attention to the filament supply, which I turn on first to avoid stripping. It gradually comes up to full level in about a minute then the B+ is turned on. I've never had a 12AX7AX fail, I change them just to have something to change. The preamp circuit is based on the SP6 with cathode followers on both phono and high level. I only use the high level now
    I want to build a tube power supply for it, maybe a hybrid with SS and tube rectification and a choke?
    That preamp you had looks very interesting, do you still have it? I've not heard the Jucy Audio gear, but it gets good comments.
    Ken

  12. #882

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    No, it had one bad channel and I actually passed it along to its designer... who didn't have one and was pleased and surprised to have the opportunity. The punchline of the story: It was a $13 eBAY acquisition. It's a funny old world.

    Mark is a fine fellow and as far as I can tell a talented designer. He, unfortunately, folded Juicy Music. I don't know whether he's restored the ADC preamp or not.

    Back to yours - I know that it's hard to get vacuum tube preamps (with even modest gain) quiet! No mean feat in the case of the one you described and built!
    all the best,
    mrh

  13. #883

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    Ken, that looks beautiful, and that Juicy Music looks Gorgeous. OMG How I coming a Tube lover.

    Speakers
    Carver Amazing Fronts
    CS400i Center
    RT800i's Rears
    Sub Paradigm Servo 15

    Electronics
    Conrad Johnson PV-5 pre-amp
    Parasound Halo A23
    Pioneer 84TXSi AVR
    Pioneer 79Avi DVD
    Sony CX400 CD changer
    Panasonic 42-PX60U Plasma
    WMC Win7 32bit HD DVR



  14. #884

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    Quote Originally Posted by mhardy6647 View Post
    Looks good to me, sir!

    Ken, did you see the Mark Deneen-designed ADC preamp that passed through my quarters a few years back? Your preamp's internals reminded me of it (the ADC was sheer overkill, with constant-current active loads on all the signal-handling tubes).

    http://www.polkaudio.com/forums/show...&postcount=139

    sorry the photo's so big (and the innards were so dusty)...

    Thats a busy chassis for a preamp.What vintage mid 80's ish?

  15. #885

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    Ken,

    Very Cool. Now the real thing is........

    I bet the brew in that green cup has got to be awesome!!!!!

    ManRule--Never touch a guy's WorkBench Joe cup.

    RT1
    REEL TIME THEATRE
    Onkyo-TX-NR5007
    B&K 7270 amplifier
    Polk SWA-500 Subwoofer amplifier
    OppO BDP-83
    Pioneer Elite 50"
    Polk LCi-RTS-105;LCi-RTS-C;LCi-RTSFx;LCi80Fx
    Subs-Twin Polk CSW200
    HTS5000


    RABBIT HOLE RIG
    BAT VK-31SE
    VTL MB-450 Signature monoblock
    Wolcott Presence monoblock
    Musical Fidelity kW SACD
    Rega P25/RB600/Clearaudio Aurum Beta
    Acoustech Phono-Pre
    Sound Lab Millenium ELS
    BillyBags Rack
    MIT S1/3 cables
    Shunyata/PS Audio/Virtual Dynamics Power Cords


    Everthing Matters...Tubes Rule...and It's Over until it's Not Over

  16. #886
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    Wow that's some preamp Ken. How would you go about getting that 20 year accumulation of dust off the components? I have a couple of pieces that need a good cleaning and compressed air just didn't do the job. I thought about some Q-tips and a mild solvent but I think that would take forever.

  17. #887

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    I bought a set of inexpensive but not lousy-quality artist's soft bristle brushes. That's one of my main tools for heavy-duty dusting. A can of air (or dried compressed air if you've got it) can also be very useful (with care). Q-tips for those hard to reach areas, too.
    all the best,
    mrh

  18. #888
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    Hello,
    I'm pretty much a Flitz, Q-tip and Goo Gone and pure alcohol kind of cleaner-up guy. Here's a shot of the preamp back on duty.
    Cheers, Ken
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  19. #889
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    Quote Originally Posted by Kenneth Swauger View Post
    Hello,
    I'm pretty much a Flitz, Q-tip and Goo Gone and pure alcohol kind of cleaner-up guy. Here's a shot of the preamp back on duty.
    Cheers, Ken
    That seemed like quite a job Ken but the results at least the facia is beautiful.

  20. #890

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    I need some learning...please...

    what , where , who
    is a KWS-1 ??


    Quote Originally Posted by Kenneth Swauger View Post
    Hello,
    I'm pretty much a Flitz, Q-tip and Goo Gone and pure alcohol kind of cleaner-up guy. Here's a shot of the preamp back on duty.
    Cheers, Ken

  21. #891

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    Quote Originally Posted by jvc View Post
    I need some learning...please...

    what , where , who
    is a KWS-1 ??
    It's Ken's Initials.

  22. #892

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    Quote Originally Posted by mmadden28 View Post
    It's Ken's Initials.
    how much for the KWS - 2 ??

  23. #893

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    Default Parasound D/AC 2000 Ultra

    Here are some pics of my newly aquired Parasound D/AC 2000 Ultra DAC.

    Digital inputs include Toslink, Coaxial, ST, and AES/EBU; I'm not familiar with the latter two.

    I've mainly seen amps and preamps in this thread, so I thought I's throw in a DAC...
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    2-Channel:

    Source 1: PC
    Source 2: Rega Apollo CDP
    USB > SPDIF Converter: Stello U3
    DAC: Audio GD NFB-7
    Preamp: Audio Research LS-15
    Power Amp: BAT VK-500
    Speakers: Magnepan 3.7's

    HT:

    Source 1: HTPC
    Source 2: Oppo 103
    Pre/Pro: Marantz av8003
    Power Amp: Rotel RMB-1095
    Fronts: LSiM-705's
    Center: LSiM-704c
    Surrounds: LSiM-702's
    Subs: Dual SVS PC12-NSD's

  24. #894
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    I have the Audio-gd NFB-7 DAC being shipped to me on Wednesday.


  25. #895

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    Accuphase C-290V with it's famous $1200 Alps Potentiometer! Supposed to be the BEST of the BEST POT ever!

    C-290V has enough filter caps to shame most amplifiers. :D




    Last edited by megasat16; 03-05-2011 at 01:31 PM.
    Trying out Different Audio Cables is a Religious Affair. You don't discuss it with anyone.

  26. #896

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    Check out these crossovers...and I thought mine were ridiculous.



    Those are a pair of one off Nagra speakers.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche

  27. #897
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    Mike, do you think with that much circuitry there would be higher distortion levels and noise?

    In any case THAT!!!! is impressive.

  28. #898

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    Quote Originally Posted by hearingimpared View Post
    Mike, do you think with that much circuitry there would be higher distortion levels and noise?
    I used to believe that more parts=less musical, less dynamics, etc... I don't believe that to be the case anymore. As long as the circuits are well engineered and quality parts are used, there should be no degradation of sound quality.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche

  29. #899

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    Just go active. That XO is ridiculous.
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  30. #900

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    Active, with all Nagra gear? Passive would be MUCH cheaper. It's just under 40 parts, it's not THAT bad. :)

    My current speakers have 27 per cabinet due to the ceramic drivers.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche

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