[Elecraft] [K3] Perfect for Field Day S&P ... Limited Production 700 Hz 8-Pole Filters

[Bill Frantz]

I have the 2.1 KHz (for SSB) and the 250Hz (for CW and digital) 
filters. I used the frequencies marked on the filters for the K3 
setup, so everything is quite standard. I notice as I am 
narrowing the bandwidth in both CW and SSB, when the K3 switches 
to a narrower filter, there is a noticeable step down in the 
noise level that doesn't occur when just narrowing the DSP 
bandwidth one notch. This reduction in noise is one of the big 
advantages in having the filters, and I don't think it involves 
AGC pumping, even though I live in Silicon Valley with a large 
number of other hams.

Cheers - Bill, AE6JV
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