Failed Resistance Test

Toys4Boys · 16258

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Offline Toys4Boys

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on: October 08, 2023, 03:42:18 AM
I'm praying that I didn't cook several resistors when soldering, measuring open circuit at input/output center pins.



Offline Paul Birkeland

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Reply #1 on: October 08, 2023, 05:48:55 AM
Can you post some build photos?  What meter are you using?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Toys4Boys

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Reply #2 on: October 08, 2023, 06:40:39 AM
The meter is a generic Amazon Auto Ranging Meter, Assark. I am getting an open circuit when I test the ends of the aforementioned resistors, other 90 ohms seem to measure in range.



Offline Paul Birkeland

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Reply #3 on: October 08, 2023, 06:41:19 AM
Can you send a link to the meter?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man



Offline Paul Birkeland

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Reply #5 on: October 08, 2023, 06:56:13 AM
That should be able to measure the 47K resistors across the input RCA jacks.  What comes up on the screen when you try? Do you have the 620A or 85D?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Toys4Boys

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Reply #6 on: October 08, 2023, 07:00:36 AM
85D, no reading, just seats at 0L.



Offline Paul Birkeland

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Reply #7 on: October 08, 2023, 07:28:20 AM
If you're in the US, I would go buy the ~$25 meter at Harbor Freight, then try again.  You would be the first customer we've ever had that burned up all their resistors, so my money would be on the $9 meter at Amazon just being a bit of POS.


Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Toys4Boys

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Reply #8 on: October 08, 2023, 07:31:42 AM
I'ld prefer to believe that as I thought that I used proper care in my build! Okay, I'll get the HF meter.

Thanks,
Paul



Offline Toys4Boys

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Reply #9 on: October 08, 2023, 08:39:54 AM
I'm seeing a $20 then a $45 meter at HF, is there value for the hobbyist to get the more expensive model?




Offline Toys4Boys

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Reply #11 on: October 08, 2023, 08:51:57 AM
Yeah, if I get lucky! Nice find though. I looked at the reviews on the HF meters and whie there were considerably fewer for the $20 model they were overall far better than the $45 model.



Offline Toys4Boys

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Reply #12 on: October 08, 2023, 08:54:47 AM
Threw out a bid, might just wait till tomorrow before buying the HF model, although I am champing at the bit to get my Eros up and running  ;)



Offline Paul Birkeland

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Reply #13 on: October 08, 2023, 09:27:03 AM
https://www.harborfreight.com/9-function-digital-multimeter-with-audible-continuity-59410.html


You'll need to adjust the resistance ranges to something sensible for whatever you're trying to measure, but this meter should work well for you.  The probes kind of suck though, so down the road I would also suggest some inexpensive silicone meter probes too.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline Toys4Boys

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Reply #14 on: October 08, 2023, 09:29:22 AM
Thanks Paul, just waiting to see if the Patriots get scored on again  ::) before heading out for that.