On May 5, 9:41*am, "D.K." wrote:
Hi all,
I'm considering to upgrade my receiver ICOM R75 with CW narrow *filters. My
main interest is NDB listening in the LW band.
There are 2 possiblities:
a) ICOM FL101 (CW narrow 9mHz IF, 250Hz) + ICOM FL53A (CW narrow 455kHz,
250Hz)
b) INRAD 121 (CW narrow 9010.6kHz, 250Hz) + INRAD 122 (CW narrow 455kHz,
250Hz)
Which combination is the better one *in terms of quality and efficiency.
Price does'nt matter.
Any advice is welcome!
Thanks in advance

D. Kremp
France

DK,

Why not the this Combo ?
FL-100 CW/RTTY Narrow 500 Hz Filter 9 MHz IF
FL- 52A CW/RTTY Narrow 500 Hz Filter 455 kHz IF
Narrow enough for NDBs and better Audio Quality.

~ RHF

wrote in message
...
On May 6, 12:38 am, RHF wrote:
On May 5, 9:41 am, "D.K." wrote:

Hi all,
I'm considering to upgrade my receiver ICOM R75 with CW narrow filters.
My
main interest is NDB listening in the LW band.
There are 2 possiblities:
a) ICOM FL101 (CW narrow 9mHz IF, 250Hz) + ICOM FL53A (CW narrow 455kHz,
250Hz)
b) INRAD 121 (CW narrow 9010.6kHz, 250Hz) + INRAD 122 (CW narrow 455kHz,
250Hz)
Which combination is the better one in terms of quality and efficiency.
Price does'nt matter.
Any advice is welcome!
Thanks in advance

D. Kremp
France

DK,

Why not the this Combo ?
FL-100 CW/RTTY Narrow 500 Hz Filter 9 MHz IF
FL- 52A CW/RTTY Narrow 500 Hz Filter 455 kHz IF
Narrow enough for NDBs and better Audio Quality.

~ RHF
.

RHF - for NDB CW DXing in the very crowded European bands you want a
very tight filter - say a 500 Hz for cruising around and then a 250 Hz
for zeroing in on your target. In fact most of the European NDB DXer's
I know use a 250 Hz filter and then an outboard 30 Hz filter like the
Timewave to really get serious on those very weak signals surrounded
closely by more powerful ones.

JP Montagu

Spot on. And the other great tool is patience- waiting for QSB to take out
one NDB and allow you to hear other ones underneath.
Dale W4OP