27 Sep
2013
27 Sep
'13
2:25 p.m.
On Fri, Sep 27, 2013 at 08:57:50AM -0400, Robert Bruninga wrote:
Why don?t we see simple ? wave 75 ohm lines used as a first step in matching a 140 Ohm Helix to 50 ohms?
The ? wave line would give an easy 112 ohms and then it shouldn?t be that hard to do a little additional construction matching to get to 140?
(building a 2.4 GHz pop-out helix that compresses flat for launch)
Clare Fowler has a neat trick
http://ww2.amsat.org/amsat/archive/amsat-bb/200001/msg00507.html
Bob, WB4APR _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb