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Thread: NOS SIEMENS F2a’s

  1. #21
    Join Date: Mar 2018

    Location: Canada, sometimes UK

    Posts: 3
    I'm Gareth.

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    Hi Sixty2 - I've sent you an email.

  2. #22
    Join Date: Nov 2014

    Location: Denbigh, N. Wales

    Posts: 106
    I'm Mark.

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    Quote Originally Posted by Sixty2 View Post
    F2a’s are Tetrodes I believe.
    Of course, you're correct ... but they still work in pentode mode ;o)

  3. #23
    Join Date: Apr 2012

    Location: London

    Posts: 685
    I'm James.

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    Bit of a thread drift going on... These are superb valves if you need them, and if so then a matched NOS pair of impeccable provenance are easily worth the asking. Bear in mind that telecommunications valves like this will never ever be made again, and if they ever were faked could only be a shadow of the original, as the materials and machinery would never match up.
    They aren't like 300b, they are at least equal performance wise, and massively superior design-wise. The pinnacle of 60s tech.

    Sent from my GT-I9195 using Tapatalk

  4. #24
    Join Date: Apr 2016

    Location: Harrogate

    Posts: 381
    I'm Mark.

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    Thanks for your thoughts James. I bought this pair from a London valve dealer (can’t remember his name) maybe 12 years ago, along with a pair of Western Electric 300B’s.

    Now withdrawn.
    Last edited by Sixty2; 18-06-2018 at 12:57.

  5. #25
    Join Date: Apr 2016

    Location: Harrogate

    Posts: 381
    I'm Mark.

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    Back up for sale again. £210.00, firm including RMSD at cost.
    Last edited by Sixty2; 02-07-2018 at 11:21.

  6. #26
    Join Date: Apr 2016

    Location: Harrogate

    Posts: 381
    I'm Mark.

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    Bump!

  7. #27
    Join Date: May 2014

    Location: Solihull

    Posts: 717
    I'm Martin.

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    Quote Originally Posted by Jazid View Post
    Bit of a thread drift going on... These are superb valves if you need them, and if so then a matched NOS pair of impeccable provenance are easily worth the asking. Bear in mind that telecommunications valves like this will never ever be made again, and if they ever were faked could only be a shadow of the original, as the materials and machinery would never match up.
    They aren't like 300b, they are at least equal performance wise, and massively superior design-wise. The pinnacle of 60s tech.

    Sent from my GT-I9195 using Tapatalk
    Pardon my ignorance but could these be used in place of 300b ?
    Lumley Heliosphere Audiomods 5
    Voyd Valdi AN Arm 1 V2 and Denon MC
    Audiomeca Talisman Highly Modded
    Audiomeca Kreatura &,SW1X DAC1
    Hovland HP200 MC
    Hovland Radia
    Ming Da 805 monos
    Magnum Dynalab Etude, RWA Cassabria + LCD 3
    Wilson Benesch Actors
    Cables by Cardas, Hovland G3 and Yter

  8. #28
    Join Date: Apr 2016

    Location: Harrogate

    Posts: 381
    I'm Mark.

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    Hi Martin, to my knowledge, Shindo make a Cortese power amp as either a 300B or F2a variant but valves are not interchangeable. Thoress of Germany do the same 300B and F2a variants.
    Last edited by Sixty2; 10-07-2018 at 07:36.

  9. #29
    Join Date: Apr 2016

    Location: Harrogate

    Posts: 381
    I'm Mark.

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    Bump, for the hell of it!

  10. #30
    Join Date: Apr 2016

    Location: Harrogate

    Posts: 381
    I'm Mark.

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    After a couple of month’s ‘Bump’!

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