[ICOM] IC-775 filters (Was Icom 781 vs. 756 Pro 3)

[JMILLER1706 at cfl.rr.com]

Yes, the 775 oscillators appear to all be digitally derived from a 
master source.  I am able to compensate for the filter response some by 
offsetting the passband tuning slightly when going from LSB to USB.  
Perhaps I could adjust the mechanical detent on the PBT tune knob.

----- Original Message -----
From: Anders Janis SM4RNA <sm4rna at telia.com>
Date: Thursday, December 7, 2006 11:40 am
Subject: [ICOM] IC-775 filters (Was  Icom 781 vs. 756 Pro 3)
To: ICOM Reflector <icom at mailman.qth.net>,= José Luis Lavalle = 
<jlavalle at afip.gov.ar>

> No! The IC-775 do not have such an adjustment. Only 60MHz master osc.
> 
> On older radios as a IC-765, IC-751 it is possible, though.
> 
> /Anders
> 
> 
> 
> 
> ----- Original Message ----- 
> From: "Fern Rivard" <crc at cyberlink.bc.ca>
> To: "ICOM Reflector" <icom at mailman.qth.net>
> Sent: Wednesday, December 06, 2006 9:24 PM
> Subject: Re: RE: [ICOM] Icom 781 vs. 756 Pro 3
> 
> 
> > Hi Jim:
> >    Yes, this may be due to a non symmetrical filter but that can 
> easily 
> > be corrected with re-alignment of both carrier oscillators for 
> usb and 
> > lsb. There's probably nothing wrong with your ssb filter but 
> rather that 
> > those two oscillators have to be aligned properly.
> >    Cheers from Fern  VE7GZ
> > 
> > 
> > 
> > 
> > ----- Original Message ----- 
> > From: <JMILLER1706 at cfl.rr.com>
> > To: "ICOM Reflector" <icom at mailman.qth.net>
> > Sent: Wednesday, December 06, 2006 12:48 PM
> > Subject: Re: RE: [ICOM] Icom 781 vs. 756 Pro 3
> > 
> > 
> >>I have a 775DSP which I am quite happy with except for the slight
> >> change in voice tonal quality when switching from LSB to USB 
> (in USB
> >> the audio spectrum seems to shift slightly toward the trebles). 
> I 
> >> have
> >> heard someone comment here that this is due to non-symmertical Icom
> >> filters, and that an Inrad replacement would help.  I lost that 
> post,>> so which Inrad model is recommended?  Also which Inrad 
> roofing filter
> >> would be recommended for the 775?
> >> Jim N4BE
> >>
> >> ----- Original Message -----
> >> From: Adam Farson <farson at shaw.ca>
> >> Date: Wednesday, December 6, 2006 2:24 pm
> >> Subject: RE: [ICOM] Icom 781 vs. 756 Pro 3
> >> To: 'ICOM Reflector' <icom at mailman.qth.net>
> >>
> >>> Hi Charles,
> >>>
> >>> Have you tried various combinations of CW filter settings on 
> the 
> >>> Pro3?
> >>>
> >>> http://www.ab4oj.com/icom/pro_notes.html#cwfil
> >>>
> >>> Cheers for now, 73,
> >>> Adam VA7OJ/AB4OJ
> >>>
> >>> << Example: filters - I like the 781 filters (tight CW 
> filters) a
> >>> littlebetter than the Pro3 only because of the way they sound
> >>> under crowded band
> >>> conditions. >>
> >>>
> >>> 73,Charles, K4ZRJ
> >>>
> >>> >
> >>>
> >>>
> >>>
> >>> Scanned for viruses by Blue Coat
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> >>> ----
> >>> 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/
> >>
> >>
> >> -- 
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> Date: 
> >> 12/6/2006
> >> 
> > 
> > ----
> > 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/
>