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#1
07-25-2016, 10:38 AM
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Brown drop caps
Hi All,
Working on a parts order for my Predicta Holiday. I have quite a few older CD "brown drop" caps. As I understand it, those are film caps but they are older. Not sure of the date but I got them from one of my Elmers so I know they have been kicking around for a while. Considering the PITA to pull the PCB's on the Predicta, is it foolish to use these? The parts bill is adding up and I would like to use 'em but don't want to be penny wise and pound foolish. Thanks! JOnathan 
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#2
07-25-2016, 11:17 AM
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Originals in sets are hit or miss and the same probably goes for NOS. If you use them don't use any on the board unless you want a small risk of having to pull it again.
If it was not a predicta I'd probably tell you to try them if you want.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#3
07-25-2016, 11:32 AM
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Tom, thanks. I use them freely in radios but and have never had a problem so far. But it is generally very easy to get to them in a radio so I haven't been to worried. For the Predicta, I think I will just order new caps.
Jonathan
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#5
07-26-2016, 08:55 AM
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Andy, I do have the stuff to test them. But I guess I am too lazy! Not really, I should put together a little setup to easily test caps. Do you think if they test good they are likely to remain good for years? I have some of these caps in a radio I repaired a few years ago and it is a daily driver for the owner and is doing fine.
For the Predicta I already went ahead and ordered new caps. I was having a cheapskate moment, I had to buy tires for the car this week. Ouch! But considering the difficulty in removing the PCB in the Predicta it seemed wise to go new. Thanks! Jonathan
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#7
07-26-2016, 10:06 AM
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I have to admit I have never tested new caps but I can see where it is a good idea, not just for weeding out defectives but to verify you have the right value. I have a number of 50uA meter movements, so I'll start gathering up the stuff to make a dedicated tester.
Jonathan
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#8
07-26-2016, 10:39 AM
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Or you could buy a Heathkit C3 or similar...
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#9
07-26-2016, 03:25 PM
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EICO model 950 is another tester that runs to 500 vdc (eye-tube 1629)
__________________
"When resistors increase in value, they're worthless" -Dave G
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Linear Mode
