[Elecraft] [Fwd: Re: K3: A question about the low IF and IF image freq.]

[Toby Deinhardt]

I hope Wayne won't mind, but if any one was wondering....

-------- Original Message --------
Hi Toby,

We mix directly down from 8215 to 15 kHz using an 8230 kHz 2nd LO
(derived from the 49.380 MHz main reference oscillator). Excellent 2nd
IF image rejection is obtained by cascaded crystal filters: first the
primary filters (8 or 5 pole), then, just ahead of the 2nd mixer, a
wider filter that is optimized to suppress 8245 kHz.

73,
Wayne





vy 73 de toby
-- 
DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz)
K2 #885, K2/100 #3248
K3/100 #??? (< #200)
DOK C12, BCC, DL-QRP-AG