Capacitor tester box
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- This topic has 9 replies, 4 voices, and was last updated 3 years, 2 months ago by olcah.
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November 27, 2020 at 10:29 am #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 🙂
November 27, 2020 at 10:48 am #221710Crosbyman,
Can you referance the post by William? I’ve had fun with diodes too.- This reply was modified 3 years, 3 months ago by jeff-register.
November 27, 2020 at 10:53 am #221712It was not a post it was a detailled AOMCI “OUTBOARDER” article with circuit layouts for 3 models of the tester.
Joining AOMCI has priviledges 🙂
November 27, 2020 at 4:14 pm #221742Thank you Crosbyman!!
December 21, 2020 at 7:31 pm #225738Crosbyman,
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.December 21, 2020 at 7:55 pm #225739Actually… 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 🙂
December 21, 2020 at 9:38 pm #225743how 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 🙂
December 21, 2020 at 10:15 pm #225749.
- This reply was modified 3 years, 2 months ago by The Boat House.
- This reply was modified 3 years, 2 months ago by The Boat House.
- This reply was modified 3 years, 2 months ago by The Boat House.
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