[ICOM] Icom filters question

[V Sidarau]

John,

I for one don't feel any necessity in a SSB filter because in real life they
don't help at all. I used to use them in both IC-756 and IC-775. My personal
opinion is, SSB filters are just a waste of money. Roofing filters is what
really helps in SSB and nothing else. Just save your money and don't buy the
SSB filter. You will not miss anything. Then, the 1.8 KHz 3rd IF filter will
not suppress any 2nd IF 250 Hz skirts because the remaining parts of skirts
at a reasonable level are much narrower than 1.8 KHz.  

If you are a serious CW contest operator, you may consider the 250Hz wide
455 Hz filter in addition to the 9 MHz one. Otherwise you may easily drop
it, too. A single 250 Hz at 9 MHz is quite enough for daily of semi-serious
use. 

I for one used to use 2 x 250 Hz filters for both CW and RTTY, while the
narrow SSB filters were barely used at all. Over 100k QSOs made with such a
set-up in CW/SSB/RTTY contesting and DXing.

Hope it helps.

73,
Vlad VE3IAE

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-----Original Message-----
From: Icom [mailto:icom-bounces at mailman.qth.net] On Behalf Of John Geiger
Sent: Saturday, January 30, 2016 4:59 PM
To: ICOM Reflector
Subject: [ICOM] Icom filters question

I have an Icom 756 original (complete with blue lines in the screen) and
want to install both a narrow CW filter and a narrow SSB filter, since I do
both modes.  I currently have a FL101 250hz CW filter installed in the 9mhz
IF and could get a FL222 1.8KHZ SSB filter for the 455khz IF.  I would use
just the FL222 on SSB and use both filters on CW.  So, the 2nd IF would
narrow the passband down to 250hz, and the filter in the 3rd IF would maybe
narrow it a little more on some blowby or skirts.

I am wondering, though, if it would be better to have the wider filter in
the 2nd IF and the narrower filter in the 3rd IF?  So I could put a FL223 in
the 9mhz IF, which on CW would narrow the passband to 1.9khz, and then have
the FL53A in the 3rd IF narrowing it down even further.

Would this be a better setup, or doesn't it really matter?

73 John AF5CC
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