[ICOM] Optional Filters??

[AD5VJ Bob]

Found the answer right where you said it was:
http://www.ab4oj.com/icom/xfilter.html

> In a receiver, the filter closest to the 
>first mixer does most of the work in 
>terms of determining the IF bandwidth 
>and filtering out the unwanted sideband, 
>out-of-band signals etc. 
>If only one filter is installed, 
>it should be the 9MHz filter. 

  73 fer nw es gud DX,
QSL VIA: BUR, LotW, e-QSL
Bob AD5VJ
Old calls: WY5L/KH3-KE5CTY-N5IET
http://www.ad5vj.com/

Member: CTDXCC, NTCC, STXDXCC
FISTS: # 12637, SKCC# 2369
10X# 37210, FP#-1141
SMIRK#-5177, RARS #-149

 



> -----Original Message-----
> From: icom-bounces at mailman.qth.net 
> [mailto:icom-bounces at mailman.qth.net] On Behalf Of Anders Janis SM4RNA
> Sent: Wednesday, January 31, 2007 10:55 PM
> To: ICOM Reflector
> Subject: Re: [ICOM] Optional Filters??
> 
> You can use both and infact PBT works best if you have the 
> same bandwidth in both 9MHz and 445kHz IF.
> 
> For 455kHz you can choose a INRAD filter slightly better 
> filter skirts and still plug in. I have found INRAD filters 
> to have more accurate center freq. 
> For 9MHz INRAD also have filters but they are not plug in. 
> There I go with the ICOM FL-223.
> 
> For more information on filters check VA7OJ/AB4OJ Adam Farson's site.
> 
> /Anders
> 
> ----- Original Message -----
> From: "AD5VJ Bob" <rtnmi at sbcglobal.net>
> To: "Icom Reflector" <icom at mailman.qth.net>
> Sent: Thursday, February 01, 2007 5:46 AM
> Subject: [ICOM] Optional Filters??
> 
> 
> > Not sure how the filter scheme works on the Icoms.
> >
> > I am looking a purchasing some optional filters for my IC-775.
> > I can purchase one 9Mhz or one 455Khz but not more at this time.
> >
> > Right now it is a toss up between
> >
> > 9 MHz FILTER
> > FL-223: 1.9 kHz/-6 dB (SSB NAR.)
> >
> > 455 kHz FILTER
> > FL-222: 1.9 kHz/-6 dB (SSB NAR.)
> >
> > If I can only get one of the above -
> > Which is the better choice to make for the best 
> selectivity, or do I have 
> > to have them both IF's if I get either.
> >
> > Any ideas appreciated.
> >
> > Tnx bob ad5vj
> >
> >
> > ----
> > Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> > Icom Users Net: Sundays, 1700Z, 14.316 MHz
> > Icom FAQ: http://www.qsl.net/icom/ 
> 
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
>