To: | "DAVID CUTHBERT" <telegrapher9@gmail.com> |
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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. _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK |
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