v4.1 - Modifications to improve stability with adjustable antenna switch frequency.

NOTE: C11/12 have been changed to 390p!!! (the previous value 100n was a typo in the schematic).

v4.1 - Modifications to improve stability.

(prototype)

Antenne switcher
(can be folded to make a cube)

 

Test bench

Display unit
(the switches reverse the polarity of the meters to avoid having to swap the antenna positions)

Antenna array mounting example

Antenna array mounting example
(in the enlarged picture you find labels that indicated the antenna purpose)

Antenna array mounting example

Antenna array mounting example

Antenna switcher with BNC connectors
(folded PCB and made into a cube)

On the background some antennas

Antenna switcher
(first prototype, works perfect only not practical due to fixed coaxial cables)

Reverse side of the prototype switcher

Top view of TDOA5 3v1 assembly

Inside view

Test switch and audio input

Power supply, fuse and RF output

9-pins D-connector to the display unit
(any form of connector will do, but this one it the most rugged)

Fore/Aft and Left/Right antenna connectors.
(the DC switching signal also goes through these coaxial lines)