ORIGINAL MESSAGE: (may be snipped)
On Sun, 20 Oct 2013 00:51:44 -0700, N7CXI wrote:
>Assuming adequate core/wire sizing and airflow, can anyone think of a
>solid reason *not* to design a legal-limit HF amp output tank for 200
>ohms, then use a 4:1 "un-un" transformer to step it down to 50?
REPLY:
If the only reason to do this is to use a smaller load capacitor, I would
suggest instead to switch in some doorknob type padder caps instead. IMO, a
pi-net is a better impedance matcher than a transformer. Lower loss, less
cost, more reliable. Designing a broadband transformer is tricky business, a
pi-network is relatively easy.
73, Bill W6WRT
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|