[Elecraft] RSGB RadCom K3 review posted on RSGB Members web page

[Bill W4ZV]

Jan Erik Holm wrote:
> 
> Yes something isn´t right. This was his measurements:
> 
> CLOSE-IN INTERMODULATION ON 7MHz band,500Hz bandwidth, CW preamp off
> 
>   2.7 kHz roofing      1.8 kHz roofing   500 Hz roofing
> 2kHz  +19dBm 101dB    +12.5dBm 96dB    +2.5dBm   88dB
> 3kHz  +19dBm 101dB    +12.5dBm 96dB    +2.5dBm   88dB
> 5kHz  +22dBm 103dB    +12.5dBm 96dB    +8.5dBm   92dB
> 7kHz  +22dBm 103dB    +12.5dBm 96dB    +13dBm    95dB
> 10kHz +22dBm 103dB    +12.5dBm 96dB    +17.5dBm  98dB
> 15kHz +22dBm 103dB    +12.5dBm 96dB    +22dBm   101dB
> 20kHz +22dBm 103dB    +12.5dBm 96dB    +25dBm   103dB
> 30kHz +22dBm 103dB    +12.5dBm 96dB    +26.5dBm 104dB
> 40kHz +22dBm 103dB    +12.5dBm 96dB    +27dBm   104dB
> 50kHz +22dBm 103dB    +12.5dBm 96dB    +27dBm   104dB
> 

Yes, and also the 8-pole 1.8k should be better than the 5-pole 2.7k.  Some
very strange results indeed but I'm sure Peter is reporting what he's
measuring.  I cannot find his original Orion review but I recall it showed
the 2.4k 4-pole and 1.8k 8-pole to be much better than the 1.0k 4-pole at 2
kHz spacings, which again did not make sense unless the 1k filter was
defective.

73,  Bill

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