[TenTec] TenTec Digest, Vol 85, Issue 11

[Charles W. Shaw]

Doug, W9PN wrote:
>I would like to use the receive antenna input for a 160/80m low 
>noise receive antenna input.  How much built in RF protection / 
>switching does the Orion II have on this input?  In other words how 
>much input protection do I need on the receive only antenna to 
>prevent RF damage to the Orion due to RF energy from my transmitting 
>antenna feeding back into the receiver via the receive antenna 
>input?  How is the use of a separate receive antenna best handled 
>with a single Orion II station?

Doug,
         I had a problem with my Orion along these lines because four 
of my Beverage antennas pass beneath my 80, 40, 20 and 15 meter 
transmit antennas.  I had major problems on 40 meters when running 
the Titan III.  Never damaged the Orion, but it was shutting down and 
doing other very strange, undesirable things.  I bought a ICE 
receiver protection 
assembly,  see: 
http://www.iceradioproducts.com/reconly.html#rflimiter
at the very bottom of that page.  Mine is the model #197, but any of 
them would prevent problems for you.
         Now there are no problems or worries here running full legal 
power on any band--whether or not I am using any of my six Beverages 
for receiving.  Perhaps with a smaller RX antenna or running lower 
power, you would not need any extra receiver protection. Good 
luck.  The low bands are addicting but fun!

73,
Charles - N5UL
Hobbs, NM





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