They could also be for laser discharge. In any even there are many, many
reports of those type cats shorting and even rupturing when used in a ham
style PS at or near their maximum voltage. Unfortunately several magazine
articles were published showing them used at their ratings and even lying on
their sides so problems still continue.
Consensus has been that if run at 50-66% of ratings they work well. Ive had
a 5kv laser discharge cap running at 2500V for about 5 years of use in one
of the AM amps but it is backed up by a HV fuse. It was also new surplus and
not retired from service after xxx hours.
Carl
KM1H
----- Original Message -----
From: "Karl-Arne Markström" <sm0aom@telia.com>
To: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>; <amps@contesting.com>
Sent: Monday, January 04, 2010 5:24 AM
Subject: Re: [Amps] Right mounting of HV oilfilled C's?
> The "K-film" marking and the capacitance/voltage ratings "rings a bell".
>
> Your capacitors may be designed for heart defibrillator use,
> and those are not suited for filter capacitor service.
>
> 73/
>
> Karl-Arne
> SM0AOM
>
>
>
>
>
> ----- Original Message -----
> From: "Thomas Hoeppe" <thomas.hoeppe@asamnet.de>
> To: <amps@contesting.com>
> Sent: Monday, January 04, 2010 10:54 AM
> Subject: [Amps] Right mounting of HV oilfilled C's?
>
>
>> Hello together,
>>
>> HNY from Bavaria/Germany!
>>
>> Is it allowed to mount oil-filled capacitors "on the side", with the
>> connectors not on top?
>>
>> Here why I ask: I got 3 nice oil-filled capacitors from CSI, made in
>> USA.
>> They are labeled as a K-film capacitor, 48 uF/4,5 KVDC. "non PCB".
>> They are very compact, and I like those C's as a rugged alternative to a
>> "grave of elcos". 2 days ago I finished a small HV-PSU with 2x 1000VA
>> transformers. I get 3600V DC. Although the box is not finished 100% (my
>> aluminium supplier is still in XMAS holidays), I tested it on the air.
>> This morning I called 2 hours on 160, then went to the bathroom while the
>> tubes cooled down, HV still on. Suddenly I heard a big bang from the
>> shack, and I stood in the dark....totally undressed, of course. Perfect
>> timing! I tippeled downstairs to the fuse box...don't laugh!
>> Now I localized, that one of the oil-filled C's is short, and the body is
>> deformed....there must have been excessive pressure inside. Now I ask
>> myself if it is not allowed to mount them lying on the side. Is it
>> possible the oil is mooving down, leaving a "dry area" on the top-side?
>> I can send pictures of these capascitors, if necessary.
>>
>> TNX for your answers!
>>
>> Tom, DJ5RE
>>
>> _______________________________________________
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>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>
>
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