[amsat-bb] Antenna SWR question
Bob Liddy (K8BL)
k8bl at ameritech.net
Thu Jun 13 23:39:52 UTC 2019
Theoretically, 2:1 would have you "losing" 11 percent ofyour TX power due to reflection/mismatch. With your 4.9W,that would only be about 1/2 W. Doesn't seem like much tobe worrying about.
Polarization should be more of a concern.
GL/73, Bob K8BL
On Thursday, June 13, 2019, 2:47:29 PM EDT, AI9IN via AMSAT-BB <amsat-bb at amsat.org> wrote:
I've been having trouble getting into the FM satellites lately. It's the
same rig I've been using for a couple of years and I have not had
problems before. I bought a digital meter to measure power out from the
handhelds and to measure SWR on the antennas. According to the meter I'm
getting 4.9 W out of the handhelds, which is expected. For SWR I've got
values of 1.7 at 70 cm and 2.0 at 2 m. The antenna is an Arrow.
Are those acceptable SWR values? Should I try to get them lower? Can you
even adjust the tuning on an Arrow antenna?
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