Capacitor tester box

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    crosbyman

    Canada Member - 2 Years
    Replies: 1827
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    #221707

    The last Outboarder had a good article by William Mohat on how to build a capacitor test box.

    I went ahead and built the simpler version out of the 3 suggested in the article and then proceded to test by “used caps” box contents . All showed failure on the (red) idiot lamp.

    Testing involved voltages around 270 VDC generated from a voltage doubler using a couple of diodes, , .22uf caps , resistors and a main DPDT switch

    I tried a brand new capacitor worried my test box was a bit overly critical … the new capacitor passed the test with 100 % success with the FAIL lamp staying dark.

    The box cost me about 70$ CDN … a lot more than several new caps some would say but it was a fun , easy project to build and I can now be 100% when testing caps

    no more swapping/junking caps for nothing 🙂

    thanks for the article Mr.Mohat

    Joining AOMCI has priviledges 🙂

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    jeff-register


    Replies: 1254
    Topics: 48
    #221710

    Crosbyman,
    Can you referance the post by William? I’ve had fun with diodes too.

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    crosbyman

    Canada Member - 2 Years
    Replies: 1827
    Topics: 216
    #221712

    It was not a post it was a detailled AOMCI “OUTBOARDER” article with circuit layouts for 3 models of the tester.

    Joining AOMCI has priviledges 🙂

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    jeff-register


    Replies: 1254
    Topics: 48
    #221742

    Thank you Crosbyman!!

    olcah
    olcah

    US Member - 1 Year
    Replies: 428
    Topics: 76
    #225738

    Crosbyman,
    I assume the Antique Outboarder magazine that you refer to is the October 2020 edition. Bill Mohat discusses condenser testers on pages 40 and 41 but darned if I can see the circuit layout for his home built neon tester (or any other). Can you set me straight? Where did you find the circuit layout?
    Thank you.

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    crosbyman

    Canada Member - 2 Years
    Replies: 1827
    Topics: 216
    #225739

    Actually… if you read real closely, mr. Mowat invites (for safety reasons) able “test box builders” to write him a e-mail so he can send you a PDF file with all 3 designs.

    I built the fix voltage one (approx 275 VDC with a few simple components). The two other models involve a more complex design and a more costly test box..

    The basic model works real well and is recommended by Mr.Mowat . I have already identified a bunch of “presumed good capacitors ” now R.I.P. 🙂

    Joining AOMCI has priviledges 🙂

    olcah
    olcah

    US Member - 1 Year
    Replies: 428
    Topics: 76
    #225741

    Thanks Crosbyman. I had already requested the PDF from Mr. Mowat but have not got it yet and wondered if I missed something 🙂

    • This reply was modified 1 month ago by olcaholcah.
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    crosbyman

    Canada Member - 2 Years
    Replies: 1827
    Topics: 216
    #225743

    how long ago did you write him ?? he seems fairly busy so give it some time I have waited a few days for replies 🙂

    sorry for confusion I had wrongly remembered seeing the designs in the Outborder but actually wrote to him to get them .

    Joining AOMCI has priviledges 🙂

    Tubs
    Tubs

    US Member - 1 Year
    Replies: 3373
    Topics: 89
    #225749

    The mail is getting backed up from the virus.
    Depending where mail is coming from they
    can be short handed from people being off
    sick. Then there is Christmas. I had something
    put in the mail on the 5th and I haven’t gotten
    it yet.

    You're only as smart as the person you're talking to.

    • This reply was modified 1 month ago by TubsTubs.
    • This reply was modified 1 month ago by TubsTubs.
    • This reply was modified 1 month ago by TubsTubs.
    olcah
    olcah

    US Member - 1 Year
    Replies: 428
    Topics: 76
    #225754

    I emailed Mr. Mowat about 3 weeks ago. If I do not hear from him I will try again after New Years. Good to hear that the tester works so well!

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