Just rechecked, The first Xtal filter 6KHZ WIDE. tHE IST IF IS 2 POLE IN THE
TR-7. 4 POLE IN THE R-7a but it is 4 pole and not DOES NT HAVE STEEP SKIRTS.
The TR-7 uses 2 MONLITHICS AND TIGHT L/C AND HIGH Q (sounds like the K2)I.
That is why you can use a 10K resistor instead of the 8KHZ. in the second
IF.in a TR-7/R7A. That is my best rig. Just got a dds VFO for it.
Many rigs are a mix of 1 stage IF DSP, The second is audio DSP.
I know about roofing filters..
_______________________________________________
Elecraft mailing list
Post to:
[hidden email]
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.htmElecraft web page:
http://www.elecraft.com
Locked
