[ICOM] Icom filters question

[Gary Fiber]

Seems the 455 KHz filter had a better 3 do spec, narrower, than the 9 MHz filters do. So if you are going to split between SSB and CW I would determine which was my most used mode and install the best filter for that mode.

Say how did you ever make out with that 706 showing the high SWR.

Gary P. Fiber K8IZ
gfiber1952 at gmail.com
gfiber at comcast.net




> On Jan 30, 2016, at 1:59 PM, John Geiger <af5cc2 at gmail.com> wrote:
> 
> 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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