[Moon-net] Additional cable loss in front of LNA...

Bodo Heyl bodoheyl at gmx.de
Fri May 16 09:02:58 CDT 2008


Many thanks for all the replies,
especially the very clear explanations of
Leif, SM5BSZ and Chris, GW4DGU.

73   Bodo/DL2FCN

P.S. 
I made some practical NF measurements with
my modest measurement equipment and 
could not find any additional loss, just the loss 
of the cable in front of the high SWR LNA 
adds to the NF.
The latter is valid only under the condition that the 
impedance of the source (antenna/ generator
or noise source) is 50 Ohm..



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