[TenTec] HIS new ORION

[Steve N4LQ]

I experienced the same problem with AM BC overload on the Orion I had. 160 
and 80m were unusable due to a 50kw station about 15 miles away. I also use 
a loop. In this case, an 80m loop. Using a tuner eliminated the problem but 
I don't need a tuner with this antenna. I purchased the ICE BCI filter and 
it did the trick. My Omni 6 is not affected by BCI even with no tuner and no 
HP filter. Older TT rigs like the Omni C and Triton are totally rendered 
useless without the tuner. Whatever secret the Omni VI has needs to be 
carried over to the newer rigs. BTW: My TS-480 is totally clean in this 
regard. It's got the best front end I've seen so far.

Steve Ellington
N4LQ at iglou.com
----- Original Message ----- 
From: <wq7x at cox.net>
To: <tentec at contesting.com>
Sent: Monday, May 23, 2005 12:46 PM
Subject: [TenTec] My new ORION


> Thanks for quick response. Now I know that distortion of signals of 
> S9+35dB and above is known issue and hopefully
> will be corrected in the new firmware.
> I have another problem. With 2 el quad on 40m and having
> 50 kW AM station 7 miles from my house I'm getting IMD on my ORION on 40 
> and 80M band. Worst at 7250 ,S9 signal. No IMD on K2 or even TS930s.
> 40m quad loop looks like almost 1/4 wave for those AM stations with 
> probably higher impedance than 50 ohms, so the voltage at the antenna 
> could be very high.Attenuator doesn't improve because is implemented after 
> the two diodes D30 and D31 at the RX antenna input of the Orion. I think 
> that those diodes rectifying AM signal. This is easy eliminated if I use 
> external LP filter.  No IMD.
> Perhaps TenTec could improve that RX diode protection circuit and maybe 
> this would improve rather low IP2 of the ORION. Anybody there with the 
> same problem.
> Anybody in Phoenix would like to bring his ORION to my house,so we can 
> compare.
> Thanks, Mark WQ7X
>
>
>
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