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Re: Topband: Choke Construction Info Needed

To: "DAVID CUTHBERT" <telegrapher9@gmail.com>
Subject: Re: Topband: Choke Construction Info Needed
From: "Tom W8JI" <w8ji@w8ji.com>
Reply-to: Tom W8JI <w8ji@w8ji.com>
Date: Thu, 26 Jul 2012 18:23:30 -0400
List-post: <topband@contesting.com">mailto:topband@contesting.com>
> 30 watts is correct for 1500 watts in a 50 ohm system and a coil Q of 226.
>
> The power loss is 0.1 dB and the coil temp rise is around 20 deg C.

No, it isn't.

1500 watts is 273 volts into 50 ohms.

If Q is 226, and reactance 226 ohms, Rp is 51,077 ohms. 273 volts is 1.46 
watts heat.

To get 30 watts of heat with 226 ohms reactance, Q would have down near 
unity. No one makes a coil that bad.



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