This thread got me thinking about a box of components I bought at a hamfest about 10 years ago for a ham radio amplifier. The amp never got built. I dug up the box and it contained 2 new in the box 4CX250's, several used ceramic tetrodes, the Eimac sockets and chimneys, and 8 X Daewoo 1000uF photoflash caps. They are the older fat ones (2 inches tall, 1.5 inches dia).
If I remember correctly a fellow ham bought some similar caps for his amp. I believe that he is still using it. It runs 6 or 8 2C39's at about 1800 volts, makes about 600 watts on 1296 MHz. The tubes are water cooled and run well above their ratings. My kind of design!
I will still put some Lexan between me and these caps, and a fuse in the transformer primary if I decide to use them. I have seen similar caps explode, and I am glad that I wasn't in the path of the hot flying "stuff". Yeah, I was younger, stupider, and there was no fuse.
The caps were obviously not designed for mains use or at mains frequencies or ripple currents.
I would only use them after the regulator.
Has anyone measured the ESR of one of these?
or compared it to any other cap for HF filtering capabilities, similar to :-
http://gboers.xs4all.nl/daisy/home/g3/139/measure/capacitor-comparison.html
http://diyparadise.com/web/index.php?option=com_content&task=view&id=37&Itemid=27
Andy
I would only use them after the regulator.
Has anyone measured the ESR of one of these?
or compared it to any other cap for HF filtering capabilities, similar to :-
http://gboers.xs4all.nl/daisy/home/g3/139/measure/capacitor-comparison.html
http://diyparadise.com/web/index.php?option=com_content&task=view&id=37&Itemid=27
Andy
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