RadioBanter - View Single Post

January 30th 06, 07:07 PM posted to rec.radio.cb

On Sun, 29 Jan 2006 19:08:24 -0500, wrote:

+
++Radio Shack DLX magmount .................... 0db
++K-40 .................................................. ....... .8db
++Radio Shack 4.5' center load .................. 1.4db
++5' Firestik ................................................ 3db
++6.5" Hustler top load ............................... 4db
++108' Stainless Steel whip ........................ 4.5db
++7' Firestik .................................................. . 5db
+
+Were these antennae used as the transmitting or receiving antennae?
+If transmitting antennae then what was the receiving antenna and
+receiving equiptment. Second unknown is the path loss between the
+transmiting antenna and the receiving antenna. Third item what was the
+gain(dBi) of the receiving antenna. Without the above data, the above
+results meaningless.
+
+Who's talking dbi ? I'm not. The reference was the RS deluxe mag
+mount. Referenced at 0db
+
+As I explained. The order of best to worst is accurate. Calibrating
+the results into db is as explained below. Meaningless? I don't think
+so.
+
+This test was done with an in sight very low power remote transmitter
+located about 200 yards away. A regular CB was used with low
+readings on the S-meter to give me a relative field strength. The
+exact S numbers were noted. Then next step was to calibrate the
+readings.
+
+The db calculation were computed after taking the same CB and exciting
+it with a variable power transmitter to see how the noted S-meter
+readings related to power output of the variable transmitter.
*******

Sorry I put little faith in S-meter readings. I would prefer a
spectrum analyzer, a preamp and the test antenna to determine gain of
the antenna.

james