[ICOM] IC 746 (non-pro) Recieve antenna ?

[Gary Fiber]

Looks like that mod may place the "IN" jack right into the receiver 
front end. Older Icoms did that and it was after most TX/RX relays 
and antenna switching.
I would still use some sort of relay to open the receive antenna 
during transmit.
Otherwise you are likely dependant on switching diodes and may blow 
the receiver front end when you transmit on the other antenna due to 
RF energy absorbed by the receive antenna.

Gary K8IZ

At 10:52 PM 3/12/2008, you wrote:
>Thanks.  The mods.dk one looks to me like the best answer.  Now if I can
>just get my 160 antenna back up.
>
>Thanks es 73, de Jim KG0KP
>
>----- Original Message -----
>From: "Billy Cox" <aa4nu at ix.netcom.com>
>To: "ICOM Reflector" <icom at mailman.qth.net>
>Sent: Wednesday, March 12, 2008 10:14 PM
>Subject: Re: [ICOM] IC 746 (non-pro) Recieve antenna ?
>
>
> > Here's a few options ...
> >
> > http://www.radiobooks.com/products/svdxii.htm
> >
> > http://www.mods.dk/view.php?ArticleId=3765
> >
> > http://www.greenrover.demon.co.uk/746_rxmod.html
> >
> > http://www.ham.dmz.ro/icom/ic-746-separating-the-tx-and-rx-lines.php
> >
> > There might be others out on the web ...
> >
> > That help?
> >
> > 73 de Billy, AA4NU
> >
> >
> > ----- Original Message -----
> > From: "Jim Miller" <JimMiller at STL-OnLine.Net>
> > To: "ICOM Reflector" <icom at mailman.qth.net>
> > Sent: Wednesday, March 12, 2008 9:26 PM
> > Subject: [ICOM] IC 746 (non-pro) Recieve antenna ?
> >
> >
> > >I have wondered about the Rx antenna also.  My thought was to use the T/R
> > > relay output for the amplifier to control an antenna switch.  Is there
>an
> > > (inexpensive) antenna switch that can be electrically controlled or
>would
> > > it
> > > be too slow?
> > >
> > > Tnx es 73, de Jim KG0KP
> > >
> > > ----- Original Message -----
> > > From: <Greenacres113 at aol.com>
> > > To: <icom at mailman.qth.net>
> > > Sent: Wednesday, March 12, 2008 2:12 PM
> > > Subject: [ICOM] ic 746 antenna switching
> > >
> > >
> > >> I have an Icom 746 non Pro. Just a plain IC  746.  It's got ant. ports
>on
> > > the
> > >> back but not an aux. ant.  one.
> > >> ......
> > >> I just put up a 160m OCF dipole. I was thinking of building a
> > > beverage/loop
> > >> to rx with.
> > >> .....
> > >> I thought of a sorta' crude way if it's  possible. Use the split freq
> > >> provision. Put the tx ant on vfo  B  [  ant1] & the beverage/loop on
>vfo
> > > A. [ant 2]
> > >> Just as u wud work split chasing  the TX5 or something. It would
>require
> > >> matching the freq.s but I think it could  be done.
> > >> ....
> > >> Is there a better way on the IC 746 ?
> > >>
> > >> k9il
> > >>
> > >>
> > >>
> > >>
> > >> **************It's Tax Time! Get tips, forms, and advice on AOL Money &
> > >> Finance.      (http://money.aol.com/tax?NCID=aolprf00030000000001)
> > >> ----
> > >> 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/
> > >
> >
> > ----
> > 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/
>
>
>--
>No virus found in this incoming message.
>Checked by AVG.
>Version: 7.5.518 / Virus Database: 269.21.7/1327 - Release Date: 
>3/12/2008 1:27 PM

Gary Fiber K8IZ
GROL PG-19-6691
Washington State Resident