[Elecraft] [K3] Elecraft roofing filters

[k4gm at verizon.net]

I have the 400 and don't see the need for 250
------Original Message------
From: Kjeld Holm
Sender: elecraft-bounces at mailman.qth.net
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] [K3] Elecraft roofing filters
Sent: Feb 5, 2009 11:27 AM

Dear all,

Thanks for all the kind answers.

Sorry for all that fuss. Somehow I mixed up everything so I ended up
thinking of some nonsense like 1.0 kHz for SSB. :-o

I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. And also
filters for AM and FM.

Vy 73
OZ1CCM Kjeld



-----Original Message-----
From: W0MU Mike Fatchett [mailto:w0mu at w0mu.com] 
Sent: 5. februar 2009 15:28
To: 'Kjeld Holm'
Subject: RE: [Elecraft] [K3] Elecraft roofing filters

They are available on the website.   

KFL3A-1.0K  1 kHz, 8-pole roofing filter   	125.95

I have one in my K3 but I don't use it too much.  You might want to use it
over a 250 or 500 filter to listen to a pile up so you can hear if the
station is working people above or below his frequency.  I have listened to
SSB a bit on the filter and while very narrow for SSB you can hear the
station.

The better question might be, what modes do you like to operate?  I am about
to order a second K3 and I was going to go with the following filters.  2.8
replacing the stock 2.7/ AM/ FM/ 400 or 500 and 250.  If you never play to
transmit on AM or want to do ESSB or FM those slots would be available.  The
K3 I have now has the 2.7 which is being replaced with the
2.8/1.8/1.0/400/200 in the main rcv, 2.8/400 in the sub.

Mike W0MU

"A slip of the foot you may soon recover, but a slip of the tongue you may
never get over." Ben Franklin -----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Kjeld Holm
Sent: Thursday, February 05, 2009 5:44 AM
To: 'ElecraftList'
Subject: [Elecraft] [K3] Elecraft roofing filters

Dear all,
 
In the "Roofing Filter Notes from Wayne and Eric" link on the Order page I
see the two sentences: "Add narrower/wider filters as you prefer. I like to
use the 1.0 kHz crystal filter when tuning a crowded band or listening to a
pile up."
 
Can anyone point me to a place that can tell me what "the 1.0 kHz crystal
filter" is, where to obtain one and when it is worth using?
 
Vy 73
OZ1CCM Kjeld 


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