[TenTec] ORION_ANT_SELECTION

[K Van Horn]

Greetings George,

It is entirely normal!! When you connect 2 receivers to one antenna, the 
signal is divided equally with a splitter, which sends half of the signal to 
each receiver(load). If it important to hear the full signal level on one 
receiver, use only one receiver(assuming that you don't get a better 
listening result by using the stereo effect of 2 receivers on the same 
frequency feeding seperate ears which in turn feed your brain, allowing your 
brain to pull really weak signals out of the noise)! The Orion has a main 
receiver which is exceedingly quiet at low signal level due to the use of 
the patented Jones oscillator circuits. Given the Japanese distain for 
paying royalties, I would suspect that the Jones low noise oscillator 
circuits will not be available in the Japanese radios until the patent runs 
out(just like Icom did with the Digi-Sel feature on the 7800--my JRC radios 
have had this feature for many years...JRC held the patent, and when it 
expired, Icom used it as a big improvement in their technology on the 7800).

73 es Gud DX,

Kirby, K7EC

----- Original Message ----- 
From: "Mike Gorniak" <gorniak at ncis.com>
To: <tentec at contesting.com>
Sent: Sunday, March 13, 2005 11:51 AM
Subject: Re: [TenTec] ORION_ANT_SELECTION


> Hi George,
>
> I don't know what to say about the volume control situation, but I have
> observed the same behavior as you regarding the
> receiver antenna selection situation. As always, an antenna driving 2
> separate loads simultaneously will deliver less voltage into each one of
> them than when driving either one alone.
>
> However, I've yet to find a situation where this compromised the ability 
> of
> the Orion to hear a signal.
>
> I've observed this behavior in all versions of the software that I have
> gone through, going all the way back to 1.340.
>
> 73,
>
> Mike Gorniak
> NM7X
>
> (Original Message)
>
> Date: Sun, 13 Mar 2005 10:41:59 -0500
> From: "George K" <w2yj at highstream.net>
> Subject: [TenTec] ORION_ANT_SELECTION
>
> Orion owners.
> I have noticed a problem with my Orion running on the latest firmware,
> 1.372. I never had the previous version as it was loaded at the factory.
> When I switch the sub receiver to ant 2, that's where my beam is 
> connected,
> I notice a slight decrease of signal on the main receiver??? Is it the
> loading of the sub receiver on the main receiver doing this. Is this 
> normal?
> I also get blasted out of my shack with the audio volume reverting to full
> volume. I madly reach for the off button as my ears are near bleeding from
> the blast! This happens, as I can remember, when I turn up the volume.
> Turning it back on relieves this annoyance. This is a very infrequent 
> affair.
> The other small annoyances I can live with, so far.
> George  W2YJ
>
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