+ Reply to Thread
Results 1 to 6 of 6

Thread: Rare Ortofon A25/GT?

  1. #1
    Join Date: Jul 2019

    Location: Denmark, Sjaelland

    Posts: 2
    I'm Carsten.

    Default Rare Ortofon A25/GT?

    Hi
    I am Carsten from Denmark. I love vintage gear, especially old Ortofon. I mainly collect and mostly listen to streamed music :-) - Sorry!!!
    I came across this strange thing that I have NEVER seen before. Can anybody help me to identify it?
    It is mono in a bakelite head shell type G with a built in transformer. The cartride looks like a Type A25 with sappire stylus.

    Best regards
    Carsten
    Attached Images Attached Images

  2. #2
    Join Date: Feb 2010

    Posts: 4,173
    I'm Tom.

    Default

    You might find more expertise on rare cartridges over on Lenco Heaven.

    Are you sure it's an A type and not a C type? Hard to tell from the very small picture. Does the headshell have two output pins or four?

    Agree it's a good idea to include a transformer in these as the standard output from the C type at least is not ideal for any MC or MM phono stage. It's not something you see often though.

  3. #3
    Join Date: Jan 2009

    Location: Essex

    Posts: 22,561
    I'm openingabottleofwine.

    Default




    Clearly the generator is either the Ortofon A or Ortofon C monophonic moving-coil design fitted into the Type G headshell.



    It is not readily possible to distinguish between the A or C versions by appearance alone: the 'A' required a VTF of 7g, the 'C' required only 3.5g and was intended for professional use. The '25' denotes the diameter in um of the spherical diamond tip.
    Barry

  4. #4
    Join Date: Jul 2019

    Location: Denmark, Sjaelland

    Posts: 2
    I'm Carsten.

    Default

    Thans for answering. I am pertty sure it is an A genarator. The "needle arm" on the C version is narrower and a bit longer than the C as far as I remember. What puzzels me most is the funny built in transformer...?
    Could it be factorymade? Or DIY?

  5. #5
    Join Date: Feb 2010

    Posts: 4,173
    I'm Tom.

    Default

    Pointless asking Ortofon they have little interest in or knowledge of their own history.

  6. #6
    Join Date: Jan 2009

    Location: Essex

    Posts: 22,561
    I'm openingabottleofwine.

    Default

    Quote Originally Posted by cardal View Post
    Thans for answering. I am pertty sure it is an A genarator. The "needle arm" on the C version is narrower and a bit longer than the C as far as I remember. What puzzels me most is the funny built in transformer...?
    Could it be factorymade? Or DIY?
    I don't know if the early Ortofon cartridges used an external transformer or not. Later SPUTs used an on-board transformer, made for them by the Danish transformer manufacturer Joergen Scheu; as was the external transformer: the 2-15K They have a completely different appearance to the one shown with your cartridge.
    Last edited by Barry; 24-07-2019 at 19:31. Reason: spelling
    Barry

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •