I would echo the other responses that you may well not need any
narrower roofing filters. You might try using just the stock 2.7 kHz
filter for a while and see how it goes. I recently added the 400 Hz
filter and so far, it makes virtually no difference EXCEPT in the case
where there's a strong signal within +/- 1 kHz or so of the station
I'm trying to work. Note that a "strong signal" might be another ham
station, a broadcast station, RFI, etc.
If you're interested in listening to shortwave or AM broadcast
stations on your K3, then you might consider the 6 kHz (AM) or 13 kHz
(FM) filters. Of course, you'll also need those filters if you intend
to operate those modes.
There's a good article on the Elecraft web site about roofing
filters. Check out http://www.elecraft.com/K3/Roofing_Filters.htm
73
--
Joe KB8AP
On Dec 18, 2008, at 6:03 AM, Mike, W9QS wrote:
I have a K3/10 on order. I have used my K2 for over a year and find
the filters to be very good. I operate 90% on the time on QRP CW.
I'm looking for opinions on which roofing filters I might include.
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