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Re: [Amps] Fw: PARALLEL CAPS IN OUTPUT

To: amps@contesting.com
Subject: Re: [Amps] Fw: PARALLEL CAPS IN OUTPUT
From: Jim W7RY <w7ry@centurytel.net>
Reply-to: w7ry@centurytel.net
Date: Wed, 04 Dec 2013 19:44:48 -0800
List-post: <amps@contesting.com">mailto:amps@contesting.com>
That's ok... My 1KV load capacitor will arc (acting just like a spark gap....) across before the 3 KV padders will.

BTW I never have had my 1KV loading cap arc. EVER! And I contest on RTTY with it.

73
Jim W7RY

On 12/4/2013 12:01 PM, Bill Turner wrote:
ORIGINAL MESSAGE:          (may be snipped)
On Wednesday, December 4, 2013 10:51 AM, peter chadwick <g8on@fsmail.net> wrote:

If one is to believe Philip H. Smith in 'Electronic Applications
of the Smith Chart', McGraw-Hill 1969, page 6, Fig 1.3, the maximum voltage
appearing on a lossless transmission line with an SWR of infinity is twice
the voltage when matched.

REPLY:

I find that hard to believe but I can't actually disprove it.

However I guarantee that if you transmit high power into an unterminated
coax, the Tesla Coil effect in your output tank will cause some extremely
high voltages to appear across the load cap (and everywhere else in the
tank).

And that is what the discussion is about.

73, Bill W6WRT
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