[ARC5] 6AC7 and 6AB7

[Geoff]

Never owned one, I used crystals for mobile and a Johnson VFO for fixed operation with my TBS-50D in the 50's.

Carl

  ----- Original Message ----- 
  From: Ian Wilson 
  To: Geoff 
  Cc: ARC-5 List 
  Sent: Friday, February 08, 2013 6:04 PM
  Subject: Re: [ARC5] 6AC7 and 6AB7


  The Harvey_Wells Bandmaster VFO uses a 6AG7. That plus a small
  VR tube packed into a small wedge-shaped enclosure sits under the
  main unit.


  73, ian K3IMW


  On Fri, Feb 8, 2013 at 2:37 PM, Geoff <geoffrey at jeremy.mv.com> wrote:

    I cant remember seeing a 6AG7 in a VFO. As a VFO buffer/crystal oscillator, yes.

    Carl


    ----- Original Message ----- From: "Mike Everette" <radiocompass at yahoo.com>
    To: "Ken Gordon" <kgordon2006 at frontier.com>; "Sandy" <ebjr37 at charter.net>; "Geoff" <geoffrey at jeremy.mv.com>
    Cc: "ARC-5 List" <arc5 at mailman.qth.net>
    Sent: Friday, February 08, 2013 7:33 AM

    Subject: Re: [ARC5] 6AC7 and 6AB7


    Not sure if I recall any articles about the 6AC7 in a VFO.  Are you possibly confusing it with the 6AG7?  That was a very popular oscillator tube and worked great in a VFO.  I built a couple with 6AG7s, so can testify to it.

    73

    Mike
    W4DSE

    --- On Wed, 2/6/13, Geoff <geoffrey at jeremy.mv.com> wrote:


      From: Geoff <geoffrey at jeremy.mv.com>
      Subject: Re: [ARC5] 6AC7 and 6AB7
      To: "Ken Gordon" <kgordon2006 at frontier.com>, "Sandy" <ebjr37 at charter.net>
      Cc: "ARC-5 List" <arc5 at mailman.qth.net>
      Date: Wednesday, February 6, 2013, 7:23 PM


      > On 5 Feb 2013 at 20:40, Sandy wrote:
      >
      >> From what you are describing, it should be a very
      excellent "VFO" oscillator
      >> then? Never thought to try one like that!
      >> 73,
      >> Sandy W5TVW
      >
      > There were several articles in old QSTs, some of which
      ended up in old ARRL Hancbooks,
      > which detailed VFOs built using 6AC7s.
      >
      > Ken W7EKB


      Even the 6SK7 was a semi popular VFO tube.

      Carl
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