[TenTec] Multiple Orion Antennas

[Sinisa Hristov]

Robert Carroll wrote:

> When transmitting on port one, the Orion T/R relay, which I suspect is a
> reed relay, must provide enough isolation to the rx on the active port to
> prevent swamping and damage.  Perhaps it even grounds the rx input port.  It
> must do this with up to 100W going out of the Orion.


There is no T/R relay in Orion.
Receivers are permanently connected
to the selected ANT connector.
Even unused ANT connectors have some
circuitry connected to them at all times.

However, there is receiver protection on ANT 1
and ANT 2 connectors, but not on AUX ANT.
The protection is designed to withstand
application of at least 100 W (i.e Orion's own TX).

The coupled power into RX antenna can be measured
easily using SWR/power meter and a dummy load.
Connect "TX" connector to the RX antenna,
and "ANT" connector to the dummy load.
Now transmit using TX antenna and read coupled
"forward" power.


73,

Sinisa  YT1NT, VE3EA