[TenTec] Need help from an Orion owner......

[Bob McGraw - K4TAX]

Oh, there will be some degree of coupling.  Maybe some 60 dB or so isolation 
but even then with this much isolation, one is likely to hear signals from 
one to the other.

If you believe that one S unit is some 6 dB and the signal on ANT 1 is S-9 
+20 dB then the signal on ANT 2 is likely to be (54dB + 20dB)- 60dB or 14 dB 
or approximately two S units.  The Orion is very capable of copying a S-2 
signal.  Now, if ANT 2 is terminated into say 50 ohms the isolation between 
the two is quite different.

There will be some degree of coupling between the two.  Usually it is in the 
60 dB range and is then generally of no concern or problem.

73
Bob, K4TAX

----- Original Message ----- 
From: "fraz1" <fraz1 at bellsouth.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Monday, January 07, 2008 6:43 PM
Subject: Re: [TenTec] Need help from an Orion owner......


> Duane....please explain a tad more.  As I mentioned, I can switch from 
> ANT1
> on the front panel to ANT2 on the front panel while having the only 
> antenna
> on ANT1 on the rear panel.  When switching between ANT1 and ANT2 on the
> front panel I can hear in both positions.  The other three responses I 
> have
> received cannot.  I don't believe there should be any coupling between the
> two switch positions.
>
> 73 John
> ----- Original Message ----- 
> From: "Duane Calvin" <ac5aa1 at gmail.com>
> To: "'Discussion of Ten-Tec Equipment'" <tentec at contesting.com>
> Sent: Monday, January 07, 2008 6:38 PM
> Subject: Re: [TenTec] Need help from an Orion owner......
>
>
>>I can do the same with only the ground side of the antenna connected at 
>>the
>> 238B antenna tuner.  The Orion has a lot of gain, and often I can copy
>> signals with nothing connected to the antenna port at all.
>>
>> 73, Duane
>>
>> Duane Calvin, AC5AA
>> Austin, Texas
>> www.ac5aa.com
>>
>>
>> -----Original Message-----
>> From: tentec-bounces at contesting.com 
>> [mailto:tentec-bounces at contesting.com]
>> On Behalf Of John
>> Sent: Monday, January 07, 2008 4:52 PM
>> To: Discussion of Ten-Tec Equipment
>> Subject: [TenTec] Need help from an Orion owner......
>>
>> Hi folks.....
>>
>> Can someone please see if they have ANY coupling when between ANT1 and
>> ANT2
>> positions on the FRONT panel?
>>
>> I find that with only one antenna, connected only to the rear panel ANT1
>> SO
>> 239, I can read signals in either the ANT1 or ANT2 front panel positions.
>> Obviously, the signal is MUCH stronger when front panel is set for ANT1.
>> But, I can still fully copy the signal when using front panel position
>> ANT2.
>>
>> What do you find, please?
>>
>> Thanks much for any help.........
>>
>> 73 John K4NP
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>
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