[1000mp] INrad Collins vs Yaesu Collins 500 Hz Filter for 1000MPs

[Earl W Cunningham]

Ian, G3SEK wrote:

"The INRAD 400Hz filter makes a dramatic difference to the sub-RX,
because that one filter is all the skirt selectivity you have.

I found the Collins filter almost useless in the sub-RX because its
skirts are so broad. The much steeper skirts of the INRAD filter really
bring the sub-RX to life for CW and RTTY, both as a second RX and for
spotting in split pileups."
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I totally agree with Ian.  I was completely dissatified with the Collins
500 Hz mechanical filter in the sub receiver for the exact reasons Ian
mentions.  When I replaced it with the INRAD 400 Hz xtal filter, it made
all the difference in the world.

73. de Earl, K6SE