High Isolation Relay Board
Click image above to view
High quality FR4 double sided 2oz copper, masked, and silk screened both sides.
Dimensions: 10.1875" x 6.5".
12V activated relays with 50Ohm termination on unused antennas to reduce reradiation and unwanted internal coupling.
Impossible for one radio to transmit directly into another.
Worst case port to port isolation 61.2dB!
Jeff, AC0C, has done a thorough analysis of the switch and posted the results on his web site. Read the charts carefully. The "both antennas selected" cases are the typical use. There are several other interesting configurations as well. GREAT STUFF!
Bare PCB available for purchase.
Email for availability. |
Control / Dual Band Decoder
Click image above to view
High quality FR4 double sided 1oz copper, masked, and silk screened both sides. Dimensions: 6.125" x 4.0".
Includes two fully independent band decoders and the logic to control the 2x6 switch relays. Band data can be wired on DB25 LPT connectors (classic defacto standard) or BCD inputs (Yaesu, K3, or custom cable from other 4 bit band data devices).
Bare PCB available for purchase.
Email for availability. |
Icom Band Decode Daughter Card
Click image above to view
High quality FR4 double sided 1oz copper, masked, and silk screened both sides. Dimensions: 1.8" x 1.3".
A fully opto-isolated interface between an Icom radios analog voltage band data output and the Antenna Switch Controller. The board is designed as a "daughter card" which plugs into the CD4028 socket of one or the other port of the controller. This board takes the place of all the components of one of the two decoders. It can be used as a stand-alone decoder as well!
Bare PCB available for purchase.
Email for availability. |