1. You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
    Dismiss Notice
Dismiss Notice
This forum does not allow a single user to have more than one username. If anyone wants to change their username contact an admin and it will be done. Multiple accounts belonging to the same member will be deleted without warning.

Need help Identifying choke

Discussion in 'Amplifiers' started by Justwantdahifiaudio, Jan 13, 2021.

  1. Justwantdahifiaudio

    Joined:
    Mar 25, 2019
    Messages:
    71
    Likes Received:
    12
    Can some please tell me what size this choke is? It looks familiar I’ve seen the same size in other sweep tube amps.


     

    Attached Files:


  2. Crusher

    Crusher Well-Known Member

    Joined:
    May 12, 2007
    Messages:
    802
    Likes Received:
    310
    Sorry, I do not know. Do you have a LC meter to measure?
     
  3. Justwantdahifiaudio

    Joined:
    Mar 25, 2019
    Messages:
    71
    Likes Received:
    12
    I have this to work off..
     

    Attached Files:

  4. DoctorAudio

    DoctorAudio Active Member

    Joined:
    Sep 11, 2009
    Messages:
    65
    Likes Received:
    83
    20 Microhenry, probably 500ma to 1000ma
     
  5. nomadradio

    nomadradio Analog Retentive

    Joined:
    Apr 3, 2005
    Messages:
    4,012
    Likes Received:
    4,912
    I believe Dr Audio is right. Maco used a bunch of this choke.

    73
     
    Justwantdahifiaudio likes this.
  6. 144inBama

    144inBama Electricity doesn't kill you, ignorance does.

    Joined:
    Apr 22, 2020
    Messages:
    288
    Likes Received:
    397
    The one in a DX500V is a 10uH I'd have to pull it out to make sure, but looks identical.
     
    tecnicoloco and Crusher like this.
  7. Crusher

    Crusher Well-Known Member

    Joined:
    May 12, 2007
    Messages:
    802
    Likes Received:
    310
    Yes, Texas star uses a 10uH choke. I have a few spares. Have seen those go up in smoke.
     
    tecnicoloco likes this.
  8. Justwantdahifiaudio

    Joined:
    Mar 25, 2019
    Messages:
    71
    Likes Received:
    12
    This is a much larger choke then you would find in a Texas star... probably double the size
     
  9. DoctorAudio

    DoctorAudio Active Member

    Joined:
    Sep 11, 2009
    Messages:
    65
    Likes Received:
    83
    Maco choke:
     

    Attached Files:

    Justwantdahifiaudio likes this.
  10. Justwantdahifiaudio

    Joined:
    Mar 25, 2019
    Messages:
    71
    Likes Received:
    12
    Doctor audio that’s the one ☝️....
     
  11. Justwantdahifiaudio

    Joined:
    Mar 25, 2019
    Messages:
    71
    Likes Received:
    12
    Next question would z-14 chokes work? I’ve seen them in macos and phantoms I’m sure theres others but personal seen those.. pretty sure 44uh
     
  12. Justwantdahifiaudio

    Joined:
    Mar 25, 2019
    Messages:
    71
    Likes Received:
    12
    Looks like they are getting hard to find
     

    Attached Files:

  13. DoctorAudio

    DoctorAudio Active Member

    Joined:
    Sep 11, 2009
    Messages:
    65
    Likes Received:
    83
    A Z14 would work but a Z28 would be closer to the original value at 21 Microhenry. RFParts has them in stock!
     
    Crusher and Justwantdahifiaudio like this.
  14. Crusher

    Crusher Well-Known Member

    Joined:
    May 12, 2007
    Messages:
    802
    Likes Received:
    310
    You can find the Z-14 on eBay a little cheaper sometimes. Mouser carries but they want almost $30 for 1.
     
    DoctorAudio likes this.
  15. Justwantdahifiaudio

    Joined:
    Mar 25, 2019
    Messages:
    71
    Likes Received:
    12
    Would something like these work? I used them on a sb220 once but it was on the grid side..
     

    Attached Files:

Share This Page

  • About Us

    The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
  • Like us on Facebook

  • Premium VIP Member

    The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? We'd really appreciate it!

    Donate to us!