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Thread: valve problem?

  1. #11
    Join Date: Aug 2012

    Location: Lincs

    Posts: 863
    I'm Philip.

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    Quote Originally Posted by Blackdog View Post
    Are you using a socket convertor?
    Yes.

    OK....i understand now about the dual triode part.
    Thanks.

  2. #12
    Join Date: Jan 2018

    Location: blackpool

    Posts: 197
    I'm neil.

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    I used a socket converter - they are highly recommended valves for the Glass FX - the Jolida importer at the time Highly recommended them - perhaps he'll comment here if he comes across the thread - or perhaps PM him -OpenDoor on here Robert is a great guy to deal with

  3. #13
    Join Date: Jan 2018

    Location: blackpool

    Posts: 197
    I'm neil.

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    Ignore me - I think I've got the wrong end of the thread

  4. #14
    Join Date: Dec 2017

    Location: Ontario, Canada

    Posts: 61
    I'm Dan.

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    Quote Originally Posted by philv View Post
    Yes.

    OK....i understand now about the dual triode part.
    Thanks.
    Now I get it. They should have worked. Just bad tubes.
    Dan Santoni

  5. #15
    Join Date: Jun 2013

    Location: Gloucestershire, UK

    Posts: 554
    I'm Robert.

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    A suggestion to try

    Usually NOS 12AX7 type tubes have thicker pins than new issues. The 5755 adaptors have quite thin pins in comparison. So if they are replacing NOS tubes, there could be bad contact. Try move/shift the 5755 tubes (in their adaptors) gently when in the dac to see if that makes better contact and eliminates the problem.

    5755ís are usually extremely reliable.

  6. #16
    Join Date: Jun 2015

    Location: London/Durham

    Posts: 3,865
    I'm Lawrence.

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    Quote Originally Posted by Open Door View Post
    A suggestion to try

    Usually NOS 12AX7 type tubes have thicker pins than new issues. The 5755 adaptors have quite thin pins in comparison. So if they are replacing NOS tubes, there could be bad contact. Try move/shift the 5755 tubes (in their adaptors) gently when in the dac to see if that makes better contact and eliminates the problem.

    5755ís are usually extremely reliable.
    I had a problem with a valve socket years ago, I thought it was a faulty valve crackling but another one has the same problem and it was worse when I wiggled it. I used a pin to force the metal grips tighter in the sockets and the valve was good after that.

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