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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 5th March 2010, 02:16 AM   #11
pjanda1 is offline pjanda1  United States
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I find these folks to be pretty reasonable: https://www.surpluscenter.com/sort.a...c&keyword=EMRC I haven't purchased mail order, as I'm often in the neighborhood. I picked up 4 60uf pieces last time I was in town. They are cheaper than some other surplus places.

I'm not sure I should admit it, but my tube amp power supply is filled with motor runs that I bought as salvage from an appliance recyclers in Minnesota. They mostly came from air conditioners, and I figured there is no way an AC unit in MN can have enough hours to exceed the life span of the cap. They are still going strong, and I bought them (six in that supply if memory serves) for forty cents a pound. I still have a few kick around in a parts bin. If you've got a local appliance recycler and a sense of adventure, you might ask. $10 will buy a pretty large pile.

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Old 5th March 2010, 08:04 AM   #12
MellowTone is offline MellowTone  Australia
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Originally Posted by nightanole View Post
How can you tell if its film or electrolytic?
Although you need to look at AC voltage, quality etc, you will have a fair idea by simply looking at the dimensions. If it is 50uF to 100uF and much smaller than 8cm high and 5cm across, it will probably be an electrolytic. That said, I wouldn't be buying from those who can't tell you brand, origin, ratings etc as it will cause you all sorts of trouble. Also, some may list Motor Start Caps as Motor Run Caps, be weary of this. A Motor Run Cap is designed for continuous operation, while a Motor Start Cap is only designed to be run for a few seconds at a time, to help turn power hungry electric motors over.
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Old 5th March 2010, 08:35 AM   #13
jacco vermeulen is offline jacco vermeulen  Netherlands
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Originally Posted by nightanole View Post
oil filled = film
Mylar < 250 Vac > Polypropylene
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