[Amps] cap sizes

[la7sl Nils Petter]

Just a warning :
Photoflash capacitors are not intended for PSU applications
They will generally not withstand the high ripple currents involved
in a power supply under load conditions...
Overheating and breakdown may be the result unless you run them
very well below ratings..
I do not think a commercial amp manufacturer will choose these in their
product.
BUT ...  modern high voltage capacitors are definitely a lot smaller .
Also the ones suitable for a PSU... But stay away from the "photoflash"
types....
The same goes for laser discharge caps and some medical equipment caps...
Peter

----- Original Message ----- 
From: "Edward Swynar" <gswynar at durham.net>
To: "Charles Harpole" <k4vud at hotmail.com>; <amps at contesting.com>
Sent: Monday, February 08, 2010 12:50 PM
Subject: Re: [Amps] cap sizes


> On 8th February, Charles wrote:
>
> "...I was surprised to see the small size of the same value caps .... the
> originals in the DTR-2000 Dentron were 7 inches long and inch in dia.  The
> new ones (in 2009)  were same size around, but about one inch and 1/3
> long.... or short as the truth be told.  Wow."
>
> ***********************************
>
> Hi Charles,
>
> Yes, the physical size of the new electrolytics really is quite 
> amazing...!
> They pack a LOT of "ufd." in a VERY small can anymore---even at high
> voltage.
>
> I believe the popular term for these things is/was "photoflash 
> capacitors".
> I see them often at Hamfests in this area selling for as little as fifty
> cents apiece! Needless-to-say, I always stock-up whenever I can...
>
> ~73~ de Eddy VE3CUI - VE3XZ
>
>
>
>
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