[Amps] Query about capacitor value

[Jack Parker]

Hmmm...this cap was in a BTI amp power supply that had been much modified,
including a Peter Dahl transformer, but I have no notion of what voltage was
being run on the PA. This cap has a manufacture code date of 9706...I
presume the 6th week of 1997.


On Tue, Sep 15, 2009 at 6:36 AM, Carl <km1h at jeremy.mv.com> wrote:

> That sounds like a laser discharge cap or something similar. For amplifier
> filtering it should be limited to 2500-3000V and the case temperature
> monitored. There have been many reports of them failing when run at or close
> to the marked voltage, especially when they first hit the surplus market in
> large quantities in the early 80's. There has been much written up about
> them since.
>
> I have an identical rating/size cap that has run for over 25 years at 2500V
> and that PS is now powering a PP 810 modulator.
>
> Carl
> KM1H
>
>
> ----- Original Message ----- From: "Jack Parker" <vhfplus at gmail.com>
> To: "MIKE DURKIN" <patriot121 at msn.com>
> Cc: "amps fourm" <amps at contesting.com>
> Sent: Tuesday, September 15, 2009 8:10 AM
> Subject: Re: [Amps] Query about capacitor value
>
>
>
>  It's pretty large...4-1/2 inches deep x 5-3/4 inches wide x 12 inches
>> high.
>>
>> On Mon, Sep 14, 2009 at 11:41 PM, MIKE DURKIN <patriot121 at msn.com> wrote:
>>
>>
>>> What size is it??
>>> KC7NOA
>>>
>>> > I'd like some advice on the value of a high-voltage power supply
>>> capacitor,
>>> > which I plan to offer for sale.
>>> > I have a 53uf, 5kv, oil-filled cap (no PCB's) sold (manufactured?) by >
>>> NWL
>>> > Capacitors carrying their part number 10208. I have looked at their web
>>> site
>>> > but the cap is not listed but comparable parts in their product line >
>>> are
>>> > surprisingly expensive!
>>> >
>>> > Any input would be appreciated.
>>> >
>>> > 73,
>>> >
>>> > --
>>> > Jack, W6NF
>>> > Silver Springs, NV
>>> > DM09ji
>>> >
>>>
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>>
>>
>> --
>> Jack, W6NF
>> Silver Springs, NV
>> DM09ji
>> _______________________________________________
>> Amps mailing list
>> Amps at contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
>


-- 
Jack, W6NF
Silver Springs, NV
DM09ji

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