Hi Wilson,
The response of the DSP IF filters combines (cascades) with the roofing
filters; when both are the same bandwidth, their skirts fall off much
more sharply (the rolloff is equal to the sum of the two filters). When
one is much broader than the other, we get only the skirts of the
You understand it well.
The plug in filters work before the AtoD converter and protect
it from desense due to strong nearby signals. Desense occurs
when the ALC reduces receive sensitivity because of this strong
signal. This level of suppression can be useful with other hams
operating
Would someone please explain the relationship between our plug in filters (K3)
and the variable filter response provided by our width control.
As I understand the situation, the plug in filters we buy are roofing filters,
used to prevent intermod from strong signals outside the pass band.
Is
Jim: just one more comment: I have the 1.8, but it's a little too touchy for
fast tuning in contests for me. I went ahead and got the 2.1 for that
reason. Hope this helps. 73, Fred AE6IC
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On Mon, 18 Feb 2008 15:18:45 -0800 (PST), you wrote:
Ultimately, the 15 khz FM filter would be the best
choice for roofing AM and FM (on receive).
I have ordered the FM filter for use in AM BC reception. But now I am
reconsidering since someone has said that AM BC sounds so good with
one
There'll be times that we'll want to listen to AM on only one sideband
or the other to get rid of interference on the other side, but no
matter how good it may sound that way, I still want the synchronous
detector and DSP wide enough to benefit from the 12 KHz filter when
conditions allow. I
Greetings everyone,
I just ordered my 1st HF transceiver this afternoon. (K3/100-F)
The modes that I'm primarily in are as follows:
SSB
CW
PSK31
AM - listening, not necessarily transmitting
FM - listening only
I've ordered the following roofing filters:
200hz ( primarily for PSK31 and other
From the K3 FAQs (see http://www.elecraft.com/K3/K3FAQ.htm)
Q: I'm still not clear on the general-coverage (GC) receive option --
if it is indeed optional or available by default in a minimally
configured radio.
The basic radio, as well as the subreceiver, has a full array of
ham-band-only
Hi Bill,
You need the KBPF3 filter if the BBC is not broadcasting in or near a
Ham radio band. The BBC generally does not do this.
You also need the KBPF3 if you want to listen to medium wave.
You need the 6kHz filter to listen to AM with good fidelity.
Conclusion: Imho, you will want to
Hi Bill,
The standard front end filters are tuned to the Ham bands only. Far
enough outside of our bands the receiver will loose a lot of sensitivity
because of this. To cover the regions used e.g. by broadcasters you need
the KBPF3. This has nothing to do with the roofing filters.
onto
frequencies on two separate bands True?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Mark Bayern
Sent: Monday, February 18, 2008 1:55 PM
To: Bill Kimura
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Filter question
From the K3 FAQs (see
filter so that's what you
would be hearing through in the stock setup.
So you would need the AM 5.0 filter for better
fidelity.
Ultimately, the 15 khz FM filter would be the best
choice for roofing AM and FM (on receive).
[Elecraft] Filter question
Bill Kimura bill.kimura at gmail.com
Mon Feb
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