Hi.
I had one old AM transistor radio that I realigned to give me coverage of
160 meters and used a second AM radio to heterodyne it using the local
oscillator so that I could received SSB signals on 160 meters. Not the
most stable thing in the world, but I did it just to see if I could.
73, de Lou K2LKK
At 12:40 AM 1/25/2007 -0500, you wrote:
>Hi Danny,
>
>Oh boy! this one brings back memories. In 1968 I got a MIRK
>radio--multi-band radio that covered AM, FM, Shortwave 4 to 16 MHZ and the
>30 to 50MHZ and 147-174 MHZ bands. I took the back off this radio (see he's
>dangerous even at an early age) and discovered precisely what you reported.
>I hooked it up to a 100 foot piece of wire and that thing when hooked into
>an old Reel to Reel Sony tape machine put out a reasonable sounding FM (mono
>of course) signal for about 3 blocks (directional) from my house. In
>addition, if I pressed down the record button along with the pause button
>between songs, I could get reasonably clear audio from the 5 dollar
>microphone supplied with the tape machine--but I couldn't talk over the
>songs while they were playing <g>!
>
>Such memories!
>
>----- Original Message -----
>From: "Danny Dyer" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Thursday, January 25, 2007 12:26 AM
>Subject: Re: Using HT as tuning aid for FM radio
>
>
>Similar to the 455kc IF carrier a typical AM broadcast radio puts out, 455kc
>above the tuned frequency. There was a fellow at VSDB, Va School For The
>Deaf And Blind, in Staunton, who figured out how to tap into the oscilators
>in those old tube type radios, and there were several AM transmitters to
>which one atatched some type of audio amp, with which to modulate it, and a
>wire of some type for a transmitting antenna, and voila, a ready made,
>pretty stable, normally pretty good sounding AM radio station---usually more
>powerful than the average Phono Oscilator of the day, (for several years
>after I got into commercial broadcasting, I had more radio experience than
>legal experience.
>----- Original Message -----
>From: "Louis Kim Kline" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Wednesday, January 24, 2007 11:29 PM
>Subject: Re: Using HT as tuning aid for FM radio
>
>
> > 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
>
>
>
>--
>No virus found in this incoming message.
>Checked by AVG Free Edition.
>Version: 7.5.432 / Virus Database: 268.17.11/652 - Release Date: 1/25/2007
>3:32 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
|
