--- Steve Kallal <[EMAIL PROTECTED]> wrote:
> It has been a few weeks since I built the KSB2 option. There is one problem
> I haven't yet resolved. The response on the USB side of OP1 is not as broad
> as the LSB side, and has a narrower peak.
Hi Steve.
Assuming your KSB2 is working properly, what you are seeing may very well be a
familiar characteristic of the crystal ladder filter used in the rig.
I ran some sweeps of my K2/100 several years ago, the results of which clearly
illustrate this effect. Response vs. frequency plots may be found here:
http://www.qsl.net/kd2bd/ksb2.html
The response is slightly asymmetric, with the roll-off being noticeably sharper
on one side of the passband than the other.
This is normal.
The side with the sharper roll-off will (in my opinion) "ring" more than the
gentler side. As such, audio products that hit the "sharper edge" may appear
to be over-emphasized, so it might be beneficial to tailor your microphone's
audio response and the BFO frequencies to avoid hitting this edge with too much
audio.
Also, be aware that due to the mixing scheme of the transceiver, the audio
characteristics you observed are not only a product of the sideband selected,
but also the frequency band you've on as well.
73, de John, KD2BD
Visit John on the Web at:
http://kd2bd.ham.org/
.
.
.
.
____________________________________________________________________________________
Shape Yahoo! in your own image. Join our Network Research Panel today!
http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
