[amsat-bb] THD7 Signal Strength

[Bob Bruninga <bruninga@xxxxxxxxxxxxx>]

Doing this satellite stuff with the THD7, I decided to calibrate my
Signal Strength indicator.  Here is the result, your mileage may vary:

            at 146 MHz   at 444 MHz  |   at 437 MHz
SIGNAL       dBm   uv     dBm   uv   |    dBm   uv
---------   ----  ----   ----  ----  |   ----  ----
*           -121  0.2    -120  0.22  |   -116  0.35
***         -117  0.32   -115  0.4   |   -112  0.56
****5       -113  0.5    -111  0.63  |   -107  1.0
****5*7     -110  0.7    -108  0.89  |   -104  1.41
****5*7*9   -105  1.3    -104  1.41  |   -100  2.24

Notice that it is a very good receiver for 2m and 440.  I can copy packets
all the way down to -119 dbM which is quite good.  Being  optimized for
the USA 440 band, it does loose about 3 dB in the satellite band.
The narrower band European models have a different UHF filter, and do 
have the full sensitivity over their narrower 430-439 MHz band.

de WB4APR, Bob


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