Dynamic Phase Shift
Diversity Gain - Noise Cancelling
Diversity Gain - Noise Cancelling
| The front panel is fairly logically laid out, with indicators for all important functions. |
This is the basic circuit. You are invited to modify it as required or necessary. Note that when the preamps are
off, the gain controls are removed from the circuit, but the sensitivity controls remain active. This allows
"pre-balancing" the two signals, so you may fine tune the balance control to adjust the relative levels to a perfect
null (A+B x A-B=0), or the steering angle you desire (up to A+B x A+B). Also note, the attenuator allows the
adjustment of the overall output level without disturbing the relative antenna levels. The control switch permits
selection of which antenna will be phase controlled.
There are many preamp circuits available that will provide 15+dB of gain. The prototype currently uses Tentec's
preamps.
There are some dissimilarities between the schematic and the panel layout. Of course, all the final details in
flexibility are at the whim of the builder.
Have fun with this one, and report your results for the ongoing development.
off, the gain controls are removed from the circuit, but the sensitivity controls remain active. This allows
"pre-balancing" the two signals, so you may fine tune the balance control to adjust the relative levels to a perfect
null (A+B x A-B=0), or the steering angle you desire (up to A+B x A+B). Also note, the attenuator allows the
adjustment of the overall output level without disturbing the relative antenna levels. The control switch permits
selection of which antenna will be phase controlled.
There are many preamp circuits available that will provide 15+dB of gain. The prototype currently uses Tentec's
preamps.
There are some dissimilarities between the schematic and the panel layout. Of course, all the final details in
flexibility are at the whim of the builder.
Have fun with this one, and report your results for the ongoing development.
