[TenTec] ORION BCI

[Bob Henderson]

Mark

If your conclusion is correct Ten Tec should indeed correct the design flaw
and issue an ECO but is your conclusion correct?  Perhaps you have a dry
joint or a bad component somewhere preceding the internal attenuator.  Ten
Tec should still fix the radio for you and foc if it's still under warranty
but they will be dealing with a manufacturing defect not a design flaw.

I really don't know what the true situation is but I have not experienced
any of the symptoms you describe with either of my two Orions.  There are of
course many environmental variables influencing our different experiences
but we do have rather a lot of high power rf generators on this small
island.

73, Bob 5B4AGN


----- Original Message -----
From: <wq7x at cox.net>
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
Sent: Friday, May 27, 2005 4:39 PM
Subject: [TenTec] ORION BCI


>
> I believe that ORION can be much more immune to BCI/any out of band
signals than it is now. This has to be simple fix.
> I have connected external Attenuator and with just 6dB attenuation the BCI
of S9+10dB was gone.
> However with the ORION internal attenuator even  at 18dB and no attenuator
at the input  the BCI was still there.
> That means that all major circuitry of ORION is in good shape. The only
circuit before Orions internal attenuator is
> INPUT/OUTPUT AO board with bunch of relays and switching diodes to switch
the antenna for main and Sub Rx/Tx.
> If I remember correctly Barry didn't agree with me. That is OK but please
present your argument clearly and let me know why
> I'm wrong. I'm an RF engineer however I'm not working professionally with
RF anymore.
> And yes, I could use HP filter but why. I don't need it with other rigs.
Also ORION is much better than those other rigs.
> With this simple fix I think that IP2 currently measured at 63dB (not very
good) perhaps could be over 73dB as TenTec is
> showing on their website.
> Yes I probably could fix this problem myself. But I'm very busy and I will
not get paid for it. TenTec should do that.
> If they do that we all will end up with even better RX. Nothing wrong with
that.
> 73! Mark WQ7X
>
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