[Antennas] measuring SWR
[email protected]
[email protected]
2003年5月10日 10:22:49 -0600
First question!
Are you using an SWR meter that is useable at 144 MHz? Most are only
accurate to 30 MHz. unless they are truly designed for VHF use.
73 de Jerry, K�EJF
On 2003年5月10日 01:38:21 -0500 "Mike Miller" <[email protected]>
writes:
> I'm trying to match my 2m copper pipe j-pole to the feed line.
> When I had it on the ground I could adjust the feed point and
> get a very low swr across the band. After I put it up I couldn't
> get a good match at the lower frequencies but could at the high
> end of the band. This was measured at the transmitter end of the
> feedline. Now I've changed the feedline length and the apparent
> swr has changed again.
>> How can I eliminate the transmission line transformer effect
> while trying to adjust the feed point taps to a 50 Ohm match?
> Will using a 1/2 wave length line between the swr meter and
> antenna show me the true swr?
>> TIA
>> Mike KC9DOA
> - - -
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> Larry Wilson KE1HZ [email protected]
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>>
E. Jerold (Jerry) Forwood