[Elecraft] Looking ahead to Field Day - roofing filter question

[Bill W4ZV]

Julius Fazekas n2wn wrote:
> 
> In my CW opinion, I would say you don't need a filter for FD use. While
> popular, it doesn't hold a candle to the harsh conditions during a 160M or
> major DX contest, such as CQ WW on 20M.
> 

Unless your antennas or operating environment can present signals
approximately S9+30 to the K3's front end, there is NO need for ANY roofing
filters other than the stock 2.7k.  Also remember that 2.7k is already about
twice as narrow as the narrowest roofing filters in the FT-1000 family
*with* Inrad roofing filters, FT2000, FT9000, IC-7700, IC-7800, etc.  Yes
Icom and Yaesu claim to have "3k roofing filters" but they have been
actually been measured at ~5k by Sherwood and others.  Advertising hype
rules at these companies (as usual).

73,  Bill

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