[Amps] L-C-L vs C-L-C

[Hardy Landskov]

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 at contesting.com] On Behalf Of
chris at chrishays.com
Sent: Thursday, July 09, 2015 6:54 PM
To: amps at 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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