[Antennas] Re: Your Antenna "pre-selector" Desires....

2002年5月31日 14:08:47 -0400

Karl, I agree with Tim.
73, Joe
Karl Kanalz wrote:
> The "built-in" antenna tuner in your rig (the FT570), isn't *really* a
> "tuner" (per se), but more of a "line flattener", Tim.... Usually, those
> built-in "tuners" can only handle a 3:1 VSWR (not a wide range at all !).
>> As a reader suggested to you, "All that is required is an L-match, which is
> made...." You can adjust the L-network by taking your "auto-tune" off-line
> (in other words, you aren't using the built-in tuner) and looking at the
> VSWR of the antenna system and then adjusting the L-C network for minimum
> VSWR (looking toward the at-tenna system). *THEN* re-enable the auto-tune
> function on your FT-570, looking into the L-Network/Antenna System.
>> Karl K - W8TIF
> McKinney, Texas
>> -----Original Message-----
> From: Tim Billingsley
> Sent: Friday, May 31, 2002 9:43 AM
> To: [email protected]
> Cc: Joe Giacobello, K2XX
> Subject: Re: [Antennas] Antenna "pre-selector"
>> "All that is required ... is an L-match, which is made from an inductor and
> a variable capacitor."
>> Would the same be applicable in my situation?
> I have a 570 with autotuner and I am looking for a way to get a better match
> before I hit the autotune.
> As I understand it the 570 tuner has a problem with higher mismatches and it
> can be detrimental to its health in the long run.
>> Tim Billingsley KD5CKP
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