[Elecraft] roofing filters

[Ken]

My experience with roofing filters is from using Orion and Orion ii.

On my first transceiver, Orion, I ordered the narrow filters, and found anything less than about 600 cycles not to be useful.

>From a practical point of view, a roof of even 1 kc was more than adequate for CW, RTTY, and PSK operation

On my second transceiver, Orion II, I did not waste my money on these 200 cycle filters.  If you are a purist, maybe once
a month you will be in qso with a IK3 station on PSK (31 cycles wide) and find a W2 cranking up 50 cycles away at high power, and
your AGC will be affected by it.  Then it might be helpbul to use a very narrow filter, but in my opinion, this seldom to none experience  it is not worth the bucks.
DSP bandwidth adjustments will handle most situations just fine.

I suggest nothing smaller than 400 cycles as a roofing filter.

Ken K5WK