Where can one buy a "tuner-tuner"?

Mike Freeman < K 7 U I J >
"All men tend to become that which they oppose." - Laurence van der Post
----- Original Message -----
From: "Henry Brugsch" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, November 22, 2002 2:02 AM
Subject: Re: tuning up an antenna


> Hi Michael, depends on the rig you are working with.
> If the power supply is sufficiently low-rated, means that as the rig
draws
> more current, the louder the hum from the laminations. Thus, out of
tune,
> the more hum you get, the rig beginns dancing around on the table,
screws in
> the case begin to resonate, and smoke starts curling out of the
system,
> until you correct the situation.
> When the current is at a reasonable level, the hum is generally almost
gone.
> But, it depends on the rig. Those old Globechiefs, and some of the
others
> used as little as they could get away with, and so, just a bit out of
> resonence made a loud hum.
> This was one of these unforeseeable accidents that could never have
been
> predicted, or even implemented by an engineer.
> The noise bridge you have could be used as a tuner-tuner.
> But, you'd need to preset the thing to a known resonance *I.E. a known
> resonent antenna, or 50 ohms.
> Then, don't touch the controls, use an atu, and tune for minimal
noise.
> If you start trying to use the bridge to determine where the antenna
is
> resonent, and moving the controls, its value will be lost. Unless you
can be
> sure where the true setting is for the correct resonence.
> Essentially, what I am trying to do is show you how to build a
tuner-tuner.
> I wish I had thought of this, when I had my original Palomar noise
bridge
> many years ago. I could never get any real use out of it, because of
the
> fact that I never set it to a known value, and worked from there.
> That would have been a lot smarter. But, Palomar jumped ahead of my
> thinking, and created the tuner-tuner.
> Now, the best situation would be a noise bridge with detents at a
tested 50
> ohms, then you could preset the bridge by feeling the detent in the
control,
> and working from there. The best of both worlds. Even a bit of nail
pollish
> could help, but I tried this, and didn't like the inaccuracy of it.
> ----- Original Message -----
> From: "Michael Ryan" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, November 21, 2002 7:17 PM
> Subject: tuning up an antenna
>
>
> > Can   a noise bridge which was once used on an old heath kit
> > HW-12 be used in conjunction with an antenna tuner for reading SWR?
> > I will try and describe it.
> > It has a switch on the lower front which slides back and forth to
the left
> > or right for turning on or off and a flat roguery knob next to the
> > switch.  The connectors for antenna and so on are on the top.  It
also has
> > a round raised speaker.
> > I would also like to know what to look for, when it comes to the
power
> > supply hum, when the rig is loaded up for maximum out put.
> >
> > Thanks all:
> > Michael
>
>