Sony SRF M37V image problem solved - Update
Gre aus Amerika! Ich habe Ihre Artikel ber die 7600GR geniessen.
False alarm! I forgot that the M37V uses a 450 khz filter, and so the
images are only 900 khz away. Sure enough, this morning my neighborhood
stations at 1590 and 1680 are solidly represented on 690 and 780, and so
the image problem is still there. I too was wondering how IF filtering
could solve an RF stage problem...
Sorry for the confusion!
73 - Kevin S
Bainbridge Island, WA
--- In ultralightdx@..., "dhsatyadhana" <satya@...> wrote:phantom 680 signal from local 1590, etc.). I then turned on my SonyHi all:
7600GR, and the images from my strong locals were blanketing the dial,
but nothing on the M37V!
--- In ultralightdx@..., satya@... wrote:
BTW, you know what the reason for 450 kHz is? With a 3 or 9 kHz
PLL reference frequency (and thus granularity), you'd never hit
the 9 kHz frequency grid precisely when using 455 kHz. (Same
goes for a 10 kHz reference in 10 kHz territory.)