Re: Question about capacitors for coil

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: John <guipenguin@xxxxxxxxx>

Thank you very much.

Where is a good place to buy these types of caps online?

On 10/1/06, Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx > wrote:
Original poster: "BRIAN FOLEY" <<mailto:ka1bbg@xxxxxxxxxxx> ka1bbg@xxxxxxxxxxx>

Hi, yes they will work, the big problem is as they warm up the value of
capacitance changes, making tuning hard to do. an mmc made of caps from CDE
942 series will go a lot better for the money. cul brian f.
----- Original Message -----
From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
Sent: Sunday, October 01, 2006 8:27 AM
Subject: Question about capacitors for coil


> Original poster: John <<mailto:guipenguin@xxxxxxxxx>guipenguin@xxxxxxxxx>
>
> Hello.
>
> For my 9kv @ 30ma AC transformer, I will need a capacitance of about
> 0.0088 MFD. I have been looking at some 40kv 2000pf Strontium
> Titanate ceramic caps on ebay. These have a "DC" voltage rating of
> 40KV.  I have been told that I can de-rate this rating to around
> 40-50% min for use with a High voltage AC circuit.
>
> Would these be an OK choice in parallel to give as close as possible
> to 0.0088uF? I am fairly new to coiling and would like an opinion
> before I buy these caps.
>
> Thanks.
>
>