In my previous configurations using a Corsair II or OMNI-D, and an AUX
receiver ( R4-B, Paragon, and OMNI VI+), I used the Corsair's N.O. relay to
operate a multiple contact double throw relay to take the AUX receiver out
of receive mode during the Corsair II's transmit and open (or ground) the
AUX receiver's antenna connection at the same time (the AUX receiver lead is
NC during CORSAIR II receive). When using a transceiver as the AUX receiver,
the multiple contact relay can used to disable (open) the keying loop of the
AUX transceiver (protecting the Corsair's RX) during receive and optionally
putting the AUX transceiver into transmit (with output into dummy load)
during Corsair II transmit.
73 & DX,
Gary - AB9M
----- Original Message -----
From: "D. Kemp" <nn8b@yahoo.com>
To: <TenTec@contesting.com>
Sent: Tuesday, September 26, 2006 10:08 AM
Subject: Re: [TenTec] dual receive
> Be careful of connecting a receiver to the Aux Ant
> jack.
>
> I looked into doing just that, but checked the output
> of the Aux Ant jack first.
>
> I get 0.041VDC from that jack when the transmitter is
> at 100 watts output. I used an RF sniffer circuit
> commonly found for this purpose, and read it with a
> Fluke 787.
>
> I then thought that I could ground the Aux Ant jack
> during transmit as was suggested by several folks. I
> used the relay in the rig (Corsair II) that closes on
> transmit and is connected to ground. Even when the Aux
> Ant jack is grounded using this relay I got 0.021 VDC
> on the jack.
>
> I asked Ten Tec about using the Aux Ant jack for a
> second receiver as the manual actually states and they
> said they would NOT do that.
>
> You must have some positive way to insure there is NO
> feedback to the receiver when transmitting. I have not
> tried an open contact yet; a N.C. contact that will
> open on energization during transmit. That may require
> an external relay or possibly rewiring the internal
> relay if it has a N.C. contact.
>
> I was going to use an RX320 as a second receiver. I am
> now pursuing using a magnetic loop type antenna for
> the RX320 and/or the Corsair II. Some type of positive
> muting is still needed.
>
> With the external PTO (VFO) I can receive 2 separate
> signals at the same time for split operation on the
> same band, but another receiver would permit cross
> band operation.
>
> 73,
>
> Don, NN8B
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|