|[AMRadio] Re: New antenna results!|
ne1s at neandertech.com
Tue Jan 30 13:49:03 EST 2007
Brett gazdzinski writes:
> I have about 15 feet of the RG214 between the tuner
> and the open wire line.
> In the past, doing experiments, I have had the coax
> get very warm, high current point I suppose.
> But as it is now, the coax is stone cold.
> So the high current points must be at the open
> wire line....I would guess...
More than likely high VOLTAGE points, which are worming up the dielectric in
the coax due to the dissapation factor (=loss) of the dielectric material.
Coax, being a low-impedance feedline, can take some pretty high currents
without complaining. It is not, on the other hand, designed for very high RF
voltage between the center-conductor and shield, which is what you have when
there is a high SWR, at high power,on the coax. Depends to a great degree on
the dielectric used in the particular coax you have.
If it works, use it ;>)
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