3 or 6 KV ceramics sold by RF Parts work best for plate bypass;
However for other apps, the old postage stamp micas will work fine.
I tested a whole bagfull of these things and they were all within one or two
percent of their ratings.
Bill K0ZL
----- Original Message -----
From: <amps-request@contesting.com>
To: <amps@contesting.com>
Sent: Tuesday, January 20, 2009 10:00 AM
Subject: Amps Digest, Vol 73, Issue 29
> Send Amps mailing list submissions to
> amps@contesting.com
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://lists.contesting.com/mailman/listinfo/amps
> or, via email, send a message with subject or body 'help' to
> amps-request@contesting.com
>
> You can reach the person managing the list at
> amps-owner@contesting.com
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Amps digest..."
>
>
> Today's Topics:
>
> 1. Re: plate bypass caps (Roy)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 20 Jan 2009 10:49:12 -0600
> From: "Roy" <royanjoy@ncn.net>
> Subject: Re: [Amps] plate bypass caps
> To: <amps@contesting.com>
> Message-ID: <4595D5891B17410A9F0A9ACEE5DD9674@RoyPC>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> About,
>
> "I have quite a few of the old-style transmitting mica caps (C-D, Sangamo,
> Solar, etc.). Are these okay to use in a nearly-legal-limit amp for
> either
> plate-choke bypassing, or antenna load padders? (etc.)"
>
> In at least one edition of my Editors And Engineers Radio Handbooks, it
> stated that mica caps are not suitable for HV bypass application service
> because of "dielectric molecular migration."
>
> I presume someone did not simply make this up. There must be basis for
> such
> a flat warning statement.
>
> 73, Roy, K6XK
>
>
>
> ------------------------------
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
> End of Amps Digest, Vol 73, Issue 29
> ************************************
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|