[Lowfer] Auto tuning - Related topic; Sorta !!

[Andy - KU4XR]

--- On Wed, 5/20/09, Eric Smith <esmithmail at gmail.com> wrote:

> how cool it would be to have an automatic variometer like
> they use at WWV on 60 kc.
> 
> Now, I couldn't design such a circuit, but I know there are
> those on here who could.  If you'll design it, i'll build one!
> 
> Eric  KD5UWL / WD2XFX


 In the days of yesteryear, broadcast stations used remote control
systems that could trim Xmtr power levels, switch antennas, read
meters remotely, and it was done over what used to be called a 
" Dry Pair " or " DC Continuity " circuit, these are still known
as Burglar Alarm circuits. The studio unit would send a very low
frequency tone to the remote unit. Each channel ( how ever many
the unit had ) would have its own tone for up/down, raise/lower,
on/off, whatever you labeled it to do. The remote unit responded
to the tone sent, and would operate an approriate relay for the 
function to be carried out. They were big and bulky, but worked 
very well.There are still alot of them out there; and could
probably be " Picked Up " literally !! just to get them out of
the way. A run of phone line from the shack to the antenna could 
make for lots of possibilities.

Todays solution is Dial-up remotes that use a regular phone line,
and pretty expensive remote control units.




Andy - KU4XR - EM75xr - Friendsville, TN.
LOWfer Beacon " XR " @ 184.322 KHz ( QRSS-60 )
Coordinates:  N:  35* 43' 54" - W:  84* 3' 16"
http://www.myspace.com/beaconxr


--- On Wed, 5/20/09, Eric Smith <esmithmail at gmail.com> wrote:

> From: Eric Smith <esmithmail at gmail.com>
> Subject: [Lowfer] Auto tuning
> To: "Discussion of the Lowfer (US, European, & UK) and MedFer bands" <lowfer at mailman.qth.net>
> Date: Wednesday, May 20, 2009, 3:21 PM
> It's been years since I posted this
> question...at the time we were all
> on the old reflector, I think.  And I think Bill
> replied that he could
> imagine a solution using op-amps, I think.
> 
> That is, how cool it would be to have an automatic
> variometer like
> they use at WWV on 60 kc.
> 
> Now, I couldn't design such a circuit, but I know there are
> those on
> here who could.  If you'll design it, i'll build one!
> 
> Eric  KD5UWL / WD2XFX
> 
> On 5/20/09, Andy - KU4XR <ku4xr at yahoo.com>
> wrote:
> >
> > --- On Wed, 5/20/09, Garry Hess <k3siw at sbcglobal.net>
> wrote:
> >
> >> Andy, listened last night after 0700Z for XR but
> nothing seen.
> >> Will keep trying from time to time as long as I
> know you're QRV.
> >>
> >> 73,
> >> Garry, K3SIW, EN52ta, Elgin, IL
> >
> >
> > Garry; The WX. looks all clear until at least late
> Sat, so I'll
> > leave it on, and if the WX. dosen't get bad; maybe
> thru the
> > weekend. Thanks for trying !!  73, OM and good
> listening:
> >
> >
> >
> > Andy - KU4XR - EM75xr - Friendsville, TN.
> > LOWfer Beacon " XR " @ 184.322 KHz ( QRSS-60 )
> > Coordinates:  N:  35* 43' 54" - W:  84*
> 3' 16"
> > http://www.myspace.com/beaconxr
> >
> >
> >
> >
> >
> >
> >
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