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Thread: Tube rolling on EAT E-glo petite phono stage? Glued heat sinks

  1. #1
    Join Date: Aug 2018

    Location: Santa Barbara

    Posts: 77
    I'm Daniel.

    Default Tube rolling on EAT E-glo petite phono stage? Glued heat sinks

    Just got an EAT E-glo petite phono stage, an upgrade from a Vincent PHO701 with upgraded Telefunken ribbed plate 12AU7. The new one has a couple of 12AX7 tubes, and I was looking forward to experimenting with different tubes. I tried to find out what the stock tubes are, but my retailer did not know, and EAT has not replied yet (only a couple of days).

    After opening it up, I notice that the tubes have heat sinks glued to them, they are cylindrical metal profiles with protruding lamellae. I cannot see any markings on the tubes, so have no idea what they might be. Additionally, I wonder how important those heat sinks are, and how to remove them safely without destroying the original tube.

    It sounds quite a bit better right out of the box, more detailed, more defined soundstage. I got it with an upgraded power supply (Sbooster), so don't know how much that affects sound compared to standard wall wart. Adjustments of resistance and gain are easy and quick. I use it with a Soundsmith Zephyr MIMC* on a VPI Super Prime Scout and it sounds best so far with 65 db gain and 600 or 1200 Ohm. Looking forward to burning in the tubes a bit more. So far so very good. Just curious about the tube rolling aspect.
    Rotel 1572 - B&W CM6 S2 - REL T9/I & arrow wireless | VPI Super Prime Scout, ADS - Soundsmith Zephyr MIMC* - E.A.T. E-glo petite | Marantz CD player | TEAC V7000 | Tisbury passive preamp | Woo WA6 SE w/13EM7 & WE422- Grado RS2e, Dan Clark Ether 2 | iPhone 10 w/Flacbox - Audioquest Dragonfly Cobalt - Etymotics ER4SR ER4XR

  2. #2
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 5,690
    I'm Alan.

    Default

    Valves don't need heatsinks, they run perfectly well without. Have you any picture of the valve and internals of the stage?

    Just fit alternative 12AX7/ECC83 without heatsinks.

  3. #3
    Join Date: May 2014

    Location: Solihull

    Posts: 681
    I'm Martin.

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    Don't the EAT have some overly priced tube dampers fitted to their stuff?
    Tangerine LP12,Naim Aro, Benz Wood
    Voyd Valdi AN Arm 1 V2 and Denon MC
    Audiomeca Talisman Highly Modded
    Audiomeca Kreatura &,SW1X DAC1
    Hovland HP100 MC
    Hovland Radia
    Quad FM4,RWA Cassabria + LCD 3
    Wilson Benesch Actors
    Cables by Cardas, Hovland G3 and Yter

  4. #4
    Join Date: Aug 2018

    Location: Santa Barbara

    Posts: 77
    I'm Daniel.

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    Thanks for the quick replies. First image is the opened chassis, one tube in place, the other removed.

    IMG_3584.jpg

    These two pictures show the top and side view of the 12AX7 tube with the metal sleeve-y-thingy. In the top view, you can see the peach colored tacky stuff that holds the sleeve to the tube.
    IMG_3586.jpgIMG_3588.jpg

    Could well be that this is a dampener to eliminate any microphonics. As it is made of metal and has all those fins, I thought it might be a heat sink. I agree, I have never heard of heat sinks with tubes, but I am certainly not a tube expert, so ask here. I thought that tube dampeners were more of a plastic thingy that easily slides on/off the tube.

    Any idea how to safely remove the dampener from the tube so that I can see what tube is used in the stock configuration?
    Rotel 1572 - B&W CM6 S2 - REL T9/I & arrow wireless | VPI Super Prime Scout, ADS - Soundsmith Zephyr MIMC* - E.A.T. E-glo petite | Marantz CD player | TEAC V7000 | Tisbury passive preamp | Woo WA6 SE w/13EM7 & WE422- Grado RS2e, Dan Clark Ether 2 | iPhone 10 w/Flacbox - Audioquest Dragonfly Cobalt - Etymotics ER4SR ER4XR

  5. #5
    Join Date: Dec 2010

    Location: North Lincs

    Posts: 178
    I'm Keith.


  6. #6
    Join Date: Aug 2018

    Location: Santa Barbara

    Posts: 77
    I'm Daniel.

    Default

    Thanks for the link. No mention of glue in that document. Looks a bit on the snakier side of accessories. Still wonder what the stock tubes are, and I a bit worried of breaking the tube while trying to remove the dampener/cooler-thingy. Hopefully EAT will reply to my direct emails.
    Rotel 1572 - B&W CM6 S2 - REL T9/I & arrow wireless | VPI Super Prime Scout, ADS - Soundsmith Zephyr MIMC* - E.A.T. E-glo petite | Marantz CD player | TEAC V7000 | Tisbury passive preamp | Woo WA6 SE w/13EM7 & WE422- Grado RS2e, Dan Clark Ether 2 | iPhone 10 w/Flacbox - Audioquest Dragonfly Cobalt - Etymotics ER4SR ER4XR

  7. #7
    Join Date: May 2018

    Location: Somerset

    Posts: 70
    I'm Paul.

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    I have the all tube E-Glow Phono which is probably due a tube replacement. I assumed it was easy to remove the heat sinks? I ordered a set of four heatsinks a few weeks back for another amplifier, they are due to arrive any day soon. I'll let you know how to fit them and how easy it is to remove them as soon as I discover.
    Out here on the perimeter there are no stars
    Out here we is stoned, immaculate
    The WASP - The Doors

  8. #8
    Join Date: May 2018

    Location: Somerset

    Posts: 70
    I'm Paul.

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    I just read the HiFi + document in the link above and does mention some teflon strips that sit between the tube and the heatsink.
    Out here on the perimeter there are no stars
    Out here we is stoned, immaculate
    The WASP - The Doors

  9. #9
    Join Date: Aug 2018

    Location: Santa Barbara

    Posts: 77
    I'm Daniel.

    Default

    If you look at the pictures, there is some chewing-gum-like material between the heat sink and the tube. That peach colored thing is certainly not a teflon strip. Still no word from EAT ...
    Rotel 1572 - B&W CM6 S2 - REL T9/I & arrow wireless | VPI Super Prime Scout, ADS - Soundsmith Zephyr MIMC* - E.A.T. E-glo petite | Marantz CD player | TEAC V7000 | Tisbury passive preamp | Woo WA6 SE w/13EM7 & WE422- Grado RS2e, Dan Clark Ether 2 | iPhone 10 w/Flacbox - Audioquest Dragonfly Cobalt - Etymotics ER4SR ER4XR

  10. #10
    Join Date: May 2018

    Location: Somerset

    Posts: 70
    I'm Paul.

    Default

    Hi Exophile

    My EAT tube coolers arrived today, here are the pictures but note the fixings appears different.



    Out here on the perimeter there are no stars
    Out here we is stoned, immaculate
    The WASP - The Doors

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