mfj does make something similar.  I forget the model, but it has been 
discussed on this list before.
73
Butch
WA0VJR
Node 3148
Wallace, ks.


On Wed, 16 Oct 2013, eric oyen wrote:

> ok,
> I have one of these devices (an antenna noise tuner). its called a =
> Palomar tuner-tuner (no longer made from what I hear).
> this device sits between your antenna tuner and the radio.=20
>
> The basics: you use the noise bridge to tune the antenna tuner to =
> minimum noise (the quieter, the closer to resonance you are).
>
> How I do it:
> 1. tune to the desired frequency in AM mode
> 2. turn on attenuator or reduce RF gain to 50%
> 3. turn on the noise device
> 4. adjust inductor for closest band (setting a or b for 10 meters, etc.)
> 5. adjust input capacitor for lowest noise
> 6. adjust antenna capacitor for lowest noise.
> 7. repeat steps 5 and 6 until noise is reduced to almost nil (or as lo =
> as you can get it)
> 8. turn off device, turn up RF gain and set desired mode.
>
>
>
> I use the palomar tuner-tuner to retune my antenna for optimal =
> efficiency on any band. I also record the settings so that I can get =
> close the next time (reduces tuning time).
>
> Unfortunately, the tuner-tuner unit is no longer manufactured. I wish =
> that MFJ would make something similar.=20
>
> This is the cheap alternative to an expensive auto-tuner for your HF =
> radio. It also has the advantage of allowing you to tune the antenna =
> without having to key the transmitter (thus causing unintended =
> interference) and saving wear and tear on the finals of your radio.
> The reason I use AM to listen is that it gives the best noise figure, =
> thus making it easier to find the resonance dip.
>
> anyway, there is my tutorial for using a noise bridge to tune an antenna =
> with a tuner.
>
> DE N7zzt - eric.=
>
>