[Amps] New SB-200 owner
Peter Chadwick
g3rzp at g3rzp.wanadoo.co.uk
Thu Sep 27 00:16:03 EDT 2007
Roger said:
>More than likely I'd move on to the ARRL Handbook and build a PI-L network
for the desired Q at the operating frequency which in this case is 50 to 54
MHz.<
Is there any advantage in using a pi-L, rather than a straight pi and suitable low pass or bandpass filtering to get the harmonics down? Especially since we're talking of a single band amplifier that needs to have the second harmonic at least 70dB down, and I doubt a pi-L will do that on its own
Does the pi-L give a greater impedance matching range for any given Q variation or something? Although I'd have thought that on 6, you'd be looking at pretty low SWR anyway.
73
Peter G3RZP
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