On Mar 12, 1:48*pm, "Howard James"
wrote:
I'm building a 2 metre Rx with an IF of 10.7 MHz. It will be used for FM. I
have three crystal filters with the following bandwidths: 15 KHz; +/- 6 KHz
and +/- 3.75 KHz. Which one should I use?
Thanks. Howard.

Hey OT:
In ITU region 1 you use +/- 3.75Khz. If you are across the pond then
use +/- 6Khz.
Since they spell metre that way across the pond I think you are going
to be using +/- 6Khz

73 OT
de n8zu

..... Since they spell metre that way across the pond I think you are going
to be using +/- 6Khz...

It depends on what kind of metre!

5kHz is the norm.

JOHN

On Mar 20, 12:31*pm, "John W"
wrote:
.... Since they spell metre that way across the pond I think you are going
to be using +/- 6Khz...

It depends on what kind of metre!

5kHz is the norm.

JOHN

Hey OM:
That may be so, maybe you should looky at a Kenwood TM261EJ, designed
for the European market, it has a 20Khz channel spacing on 2 metres, I
wonder why? Since 5Khz is the norm BW?

73 OT
de n8zu