Thanks Wolf
Ok the Tx uses qty-2 xtals
, with a keyed mixer for full break-cw , no
tune facility
Assume 472.1 >> 472.3 is ok as
well ?
G.
Sent: Tuesday, January 08, 2013 9:54 PM
Subject: Re: LF: 472.5 KHz OK for Xtal CW qrg ?
GB4FPR
Hi Graham,
If you can pull the crystal a bit
(which should be ok with a series C, or a combination of L+C), it's
ok.
If you can only operate on exactly 472.5 kHz, potential QSO partners
on the continent may have a problem to receive you because there is a permanent
carrier on 472.5 kHz, sometimes quite strong in this part of
DL.
Depending on the other side's filter bandwidth, a few dozen Hz away
from 472.5 kHz to either side will improve things.
If I had to use a
fixed xtal frequency, I'd go for 472.3 to 472.4 kHz. Still close enough to be
heared by lazy people (like myself) who 'park' their receiver on 472.5 kHz with
500 Hz IF bandwidth while doing other things in the shack
:o)
Cheers,
Wolf .
Am 08.01.2013 22:22, schrieb
Graham:
472.5 KHz OK for Xtal CW qrg
? GB4FPR
I did ask this a while ago, but to
re-confirm suitable qrg for xtal
cw 472.5 KHz ?
Tnx -G..
