Hi Colin.

What causes this is that you are actually picking up one of the mixing 
products that is used when the local oscillator in the FM radio is mixed 
down to the 10.7 MHz intermediate frequency.

73, de Lou K2LKK

At 12:00 AM 1/24/2007 -0700, you wrote:
>I never tried that trick until now...works absolutely great.
>Using an old short wave receiver with FM in it, and putting the ict90 on
>wide FM, i could actually listen to the audio clearly on the HT when the
>receiver was tuned to a station 10.7MHZ down from the HT's receive
>frequency..
>What exactly causes this?
>Presumably the receiver is resonating at that frequency and causing some
>sort of signal to be inducted into the HT?
>I didn't test how far away from the receiver I could go before losing the
>audio on the HT....perhaps tomorrow.
>73
>Colin, CF6BKX
>----- Original Message -----
>From: "Kenneth Lee" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Tuesday, January 23, 2007 6:45 PM
>Subject: Using HT as tuning aid for FM radio
>
>
> > Anyone ever try using their wide-band receiving HT to aid in tuning an
> > analogue FM broadcast radio.  I was trying to find a weak fm station on my
> > table top radio (it's a Teac R1 radio with analogue tuning).  I wanted to
>be
> > sure I was on frequency before adjusting the antenna so I added the 10.7
>1st
> > IF frequency to the station I wanted to receive and punched it into my
>T90.
> > The station is on 103.1 WRNR, so I punched 113.8 into the HT and opened
>the
> > squelch on the HT.  Then I tuned the Teac until I heard a "bump" in the
> > static.  I verified this works by tuning into several known local
>stations.
> > I guess the Teac is not very well shielded because I could hear the
>station
> > I was tuned to over the HT.  I also tried this trick on my Tivoli Model 1
> > and an old RS MTA-8 radio and the technique worked on all.  This trick
> > doesn't work as well on stations below 97.3 since adding the 10.7 IF
> > frequency may put you on another strong broadcaster.
> >
> > For the record, the Teac is no dx'er but sounds great on the local
>stations,
> > I could not hear WRNR at all on the Teac or RS radios.  The same station
>is
> > useable (some noise) on the Tivoli and almost full quiting on my Sat800.
>I
> > am being unfair to the Tivoli since it's at ground level and the Sat800 is
> > upstairs.
> >
> > 73, Ken -N5SWR
> >
> >
> > --
> > No virus found in this incoming message.
> > Checked by AVG Free Edition.
> > Version: 7.5.432 / Virus Database: 268.17.8/648 - Release Date: 1/23/2007
>11:04 AM
> >
> >
>
>
>
>--
>No virus found in this incoming message.
>Checked by AVG Free Edition.
>Version: 7.5.432 / Virus Database: 268.17.10/651 - Release Date: 1/24/2007 
>6:48 PM

Louis Kim Kline
A.R.S. K2LKK
Home e-mail:  [log in to unmask]
Work e-mail:  [log in to unmask]
Work Telephone:  (585) 697-5753