27 Sep
2013
27 Sep
'13
7:57 a.m.
Why don’t we see simple ¼ wave 75 ohm lines used as a first step in matching a 140 Ohm Helix to 50 ohms?
The ¼ 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)
Bob, WB4APR