RE: [TenTec] Orion RX antenna input

["Richard Detweiler" <rdetweil@hotmail.com>]

If you are using only the Orion,  I don't think you will have any problems 
as the TX relay(s) handle all the RX inputs

If you use another radio for TX, then you have to take all the precautions 
to prevent RF overload from taking out the front end.   The Front end is 
tough, but not that tough,  I've seen alot of watts RF come down a RX 
antenna if the TX antenna is at 1500 watts and close.  Far more than a few.

I'm using only ANT-1 and ANT-2 for my set up.

Best 73's
Rich
K5SF



> From: Jan Palmquist <jan.palmquist@mailbox.swipnet.se>
> Reply-To: tentec@contesting.com
> To: TenTec@contesting.com
> Subject: [TenTec] Orion RX antenna input
> Date: Wed, 05 Jan 2005 17:44:58 +0200
>
> I plan to use my Orion more efficient with both
> receivers on different antennas.
>
> One question comes up.
>
> How much RF can the extra RX antenna input handle?
> Can I damage something if I have to much RF on it?
>
> I have antennas that are very close, a few meters.
> When I run kW on one antenna there will be a lot
> of RF into the other antenna, probably several Watts,
> and that power will go straight into the input circuits
> of the receiver connected to "RX ANT", or?
>
> I have looked at the circuit diagram and see no protection,
> there are a lot of relays, but I assume they don't switch
> between TX and RX, or? "ANT 1" and "ANT 2" have diodes
> muting the signal in TX mode, bot not "RX ANT"
>
> I don't like to put a safety circuit on RX ANT input if it
> isn't necessary. There are nothing in the manual of this
> either.
>
> Anyone done this succesfully?
> or more important, Has anybody done this and burnt something?
>
> 73's de Jan - SM5FUG
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