But the L-C-L also has the capacitor rotor to ground. Therefore, only one
adjustment. It has worked well for me using a 3CX800 on 6 meters.
Still trying to understand what network you are using.
73 Hardy N7RT
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of
chris@chrishays.com
Sent: Thursday, July 09, 2015 6:54 PM
To: amps@contesting.com
Subject: [Amps] L-C-L vs C-L-C
Another reason I suspect is the C-L-C pi network allows both the variable
capacitor rotors to be at ground potential. This lets the shaft be at
ground potential making for a safer control that is not affected by the
proximity of the human operator's hand. No insulated shaft required either!
Chris, AB6QK
>
>Is there any particular reason the L-C-L T-match is better or worse
>than the more standard C-L-C pi network in this application ?
>
>Thanks,
>Steve, N2IC
>REPLY:
>In order to achieve a wide range of impedance matching, you need to
>have two of the three elements variable. Variable capacitors are
>preferred by most designers over variable inductors for reasons of
>cost, wider range of adjustment and availability. Aside from those
>constraints, either circuit will do the job.
>73, Bill W6WRT
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