Or, get the 500Hz 8-pole from Inrad...

73, Ross N4RP

On 3/7/2015 12:29 PM, Joe Subich, W4TV wrote:
If you operate any CW or RTTY you will want the 400 Hz filter. IMO,
that's the best all around filter - particularly if you have any idea
of adding the KRX3 in the future since you will not need to try to
match five-pole filter center frequencies after the fact.


--
FCC Section 97.313(a) “At all times, an amateur station must use the minimum 
transmitter power necessary to carry out the desired communications.”

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