A new valve amp incoming

Discussion in 'High Efficiency' started by David, Aug 6, 2018.

  1. David

    David Moderator

    Built by the same local tech who did the 6fd7 amps for me horns

    This particular example has upgrade parts and most importantly a prettier-than-his-usual aluminium chassis. I like how this chassis bears not a single character on it.

    And also paid for a pair of Sophia Electric mesh bulbs.

    54BF0A8A-68E1-4160-8402-2A6640D819E9.jpeg 492CFBE0-1B84-49F9-AEFD-D4396EC81BE1.jpeg 5FCCC755-1B92-4B67-9EE9-C61452A935F2.jpeg 343FCFFE-8EEE-4AD5-A737-18692C548CE1.jpeg 5CDB8AA8-FB2A-45C0-9E19-44263B2611AB.jpeg 9B66E864-7504-4E71-AB25-489098CB55A2.jpeg
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  2. TubeHiFiNut

    TubeHiFiNut Administrator Staff Member

    Very pretty. :)
    David likes this.
  3. David

    David Moderator

    No I think he buys them cheap from China. Otherwise it’s all P2P. You once saw his work and was impressed I recall. I’ll post some pics if I get them from the prev owner.

    You may recall I once had a more expensive 300b amp from someone who winds his own trannies. I actually prefer our local tech’s amps bette. At least nil 300b hum!

    Another great thing about it is the tech is locally available for repairs etc.

    Oh and the drive tubes are 6fd7 again.
  4. mhardy6647

    mhardy6647 Señor Member

    FWIW, I've been pretty pleased with the "mesh" plate (perforated is more accurate, I'd say) "Sofia" branded 2A3s -- which I think are the same dang tubes as the 300Bs with a 2.5 V filament.

    [​IMG]meshplate2A3 by Mark Hardy, on Flickr

    kind of goofy looking, though. :confused:
    Last edited: Aug 7, 2018
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  5. David

    David Moderator

    I love me mesh tube looks hence 300b since driving kef with 2a3 appears somewhat daunting
  6. mhardy6647

    mhardy6647 Señor Member

    Not recommending 2A3s for you -- but the Sofia 300B and 2A3 are, I am pretty sure, the same tube with different filament voltage.

    The aesthetic issue I have with 'em is that huuuuuuuuuge globe envelope. Now, there really were some large globe tubes (e.g., the 50), but there were no globe 2A3s (nor 300Bs), AFAIK. A globe 45 looks... right. A globe 300B or 2A3 looks kind of... contrived.

    Just my aesthetic opinion, and, of course de gustibus non est disputandum.

    The Sofia tubes sound good.
  7. David

    David Moderator

    Heh the Princess I once had wasn’t globe shaped and i as disappointed actually
  8. mhardy6647

    mhardy6647 Señor Member

    correlation is not causation ;)

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  9. David

    David Moderator

    Theres something edison lightbulb about the shape i like it
  10. Redboy

    Redboy Knobophobe

    What are you, some kind of purist?

    For that matter, how many people actually know that a 12AX7 shouldn't glow green? Let your LED freak light shine, baby!!

    (I keed, of course. :tongue:)
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  11. mhardy6647

    mhardy6647 Señor Member

    Don't get me started...

    oh, and...

    Of course I'm a purist!


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  12. David

    David Moderator

    Some production pics Eric does an amazing job on budget

    6B9DECFF-228B-4695-A34F-82AA0D26B672.jpeg 690CB0DC-23B7-4B83-80B6-2EAA809A5EA2.jpeg 4817EFD5-DA88-42FB-9266-3CAAE63D17C6.jpeg E1C7D992-D958-4032-AEA0-72CB9DD0E651.jpeg 0E9F0EF2-BA33-41B5-A3EB-B24D0ED7EAF9.jpeg D0D12589-98C7-476E-A354-D769E43019B5.jpeg 520DD6B8-7EB9-4FCB-847A-A426129A01D3.jpeg
  13. Thermionics

    Thermionics Post Whore In Training

    Damn, that's beautiful!
    David likes this.
  14. guiller

    guiller Active Member

    Wonderful job!
    David likes this.
  15. David

    David Moderator

    Well the tubes arrived even before the amp was picked up.


    As the the OPTs, the tech offered this insight:

    The marzE amp uses marzE outputs, which was designed and made by a factory, I do dismantle ONE to see its workmanship and material, it is very good, Z11 lamination, interlaced winding, and the result from a marzE amp is good.”
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  16. StevenZ

    StevenZ Active Member

    Does this guy have a website? I'm curious what you paid for that. Looks great!
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  17. David

    David Moderator

  18. StevenZ

    StevenZ Active Member

    Thanks. Reasonably priced for sure.

    Do you feel these are superior to the Westons you had?
  19. David

    David Moderator

    It hasn’t arrived yet. Lazy couriers.

    But I had one before anyway. I liked this one better because it had nil hum.
  20. David

    David Moderator

    Finally here man sounding AMAZING with the LS50. Makes the LS3/5a with Sugden sound relatively grainy...!

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