[ARC5] BC-375 tubes

[Geoff]

I dont know of any way to cure an air leak short of pumping down the vacuum. 
A gas leak as I describe it is released from the anode thru lack of use and can often be regettered by running the anode at color. That gas is blue.

Carl



  ----- Original Message ----- 
  From: Dennis Monticelli 
  To: Geoff 
  Cc: Mike Everette ; ARC-5 Maillist 
  Sent: Wednesday, November 20, 2013 11:27 AM
  Subject: Re: [ARC5] BC-375 tubes


  I wonder how many of those leaky 826's would be OK after an extended "bake?"  A very slow leak can add up to a lot over 60 years, but if successfully gettered they may be OK for our immediate use and for the next decade.


  Dennis AE6C












  On Wed, Nov 20, 2013 at 8:08 AM, Geoff <geoffrey at jeremy.mv.com> wrote:


    ----- Original Message ----- From: "Mike Everette" <radiocompass at yahoo.com>
    To: <arc5 at mailman.qth.net>
    Sent: Wednesday, November 20, 2013 7:35 AM
    Subject: [ARC5] BC-375 tubes



    I haven't read every message in the thread so don't know if this has been tried yet.

    What about the 826? This is a triode, looks like an 829B without the plate pins.


    The only ham use of these things seems to have been in Gonset 6 and 2 meter linears to be paired with the Gooney Box AM rigs. Thanks to the cold-war generousity of th' Fed'rul Goobermint and the Civil Defense program, there are about a bazillion of these tubes still extant, NIB.

    And I don't think th' Audiophools have discovered them yet.

    73
    Mike
    W4DSE



    ** Unfortunately many 826's have seal leaks. I went thru several dozen and found only 9 good ones not too long ago. Some audiophools have discovered them, maybe that nice purple glow gives warm fuzzy music.

    Carl




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