Hi Jack. I've been up for awhile ;-)
For those who are interested, the data was taken from the Rx antenna
input to the IF output. The scales are either 5dB or 10dB/ vertical
division, as indicated in the legend at the top of each chart. The
markers are at roughly the -3dB points. The behavior of the 40m filter
is caused by the 8.215MHz notch filter.
73,
Larry N8LP
Jack Smith wrote:
It's probably too early in the morning for Larry, N8LP, to be up, so
I'll mention that he has measured K3 RF filter bandwidth data posted
at http://www.telepostinc.com/K3_Stuff.html.
Jack K8ZOA
[EMAIL PROTECTED] wrote:
Hi Doug,
OK...just how wide is the bandwidth when "limited by the K3's BP
filters?
For what it's worth...
A quick and very dirty attempt to "simulate" one of the filters using
Elsie 2.12 (free version) gave me in the 10m band filter a -3dB width
of roughly 2.7MHz, after some tuning -> 40pF trimmers to 32pF. I
assumed a Q of 1000 for the capacitors and 200 for the inductors.
Maybe using Elsie or the AADE filter designer might help give you a
rough idea, if you can't do simulations with Spice.
vy 73 de toby
_______________________________________________
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
_______________________________________________
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
