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Subject: Re: [Elecraft] scopeing filters for eventual diversity receive.
On Sat, 27 Mar 2010 15:09:02 -0700, Ed Muns wrote:
However, my 400Hz 8-poles are offset by as much at 80Hz.
I've observed that too.
73,
Jim K9YC
Inject a clean signal to the K3, around S5 - S7 in level, go into the
CONFIG menu, adjust the filter offset (FLx FRQ) by rotating the main
tuning knob until the signal drops one S point then adjust it to the
other side until it again drops one S point. Set the offset to the
middle of the two
Why use the S-Meter for this? Depending on where you are in that S-Unit
that can make you miss the center. What you need is a relative dB
measurement. Turns out that the only piece of test equipment that you
need is a K3.
Center the signal in the passband. Then hit disp and use VFO to get
...@mailman.qth.net] On Behalf Of Dave, G4AON
Sent: Sunday, March 28, 2010 11:10 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] scopeing filters for eventual diversity receive.
Inject a clean signal to the K3, around S5 - S7 in level, go into the
CONFIG menu, adjust the filter offset (FLx FRQ
I'm planning to install a sub receiver eventually. Now I need a CW
filter. I'm considering buying two now, matched, with the second for
later use with the sub receiver.
I understand that the 5-pole filters need to be matched, but have the
impression that the 8-pole filters do not.
Is that
I understand that the 5-pole filters need to be matched, but
have the impression that the 8-pole filters do not.
Is that right? If so, I only need to buy one filter now
The 8-pole filters are described as having a nominal 0 offset and do not
need to be matched for diversity. However, my
On Sat, 27 Mar 2010 15:09:02 -0700, Ed Muns wrote:
However, my 400Hz 8-poles are offset by as much at 80Hz.
I've observed that too.
73,
Jim K9YC
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On Sat, 27 Mar 2010 15:09:02 -0700, Ed Muns w...@msn.com wrote:
I matched all of my 8 pole filters by using the NGEN noise generator
and setting them for matching white noise pitch.
It seemed to work for me.
TOM, N5GE BT
73 ES GUD LUK
AR DE N5GE SK
[snip]
The 8-pole filters are described as
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