[TenTec] Orion-II 15m TX Spur?

[Ron Castro]

I just checked on my spectrum analyzer and found no spur at 11.8 MHz at any 
power level on my O2.  I used a 5-foot dipole outside about 75' from the 
antenna, which is hardly a laboratory-grade test set up, but I'm sure I 
would have seen something if it was there.  I did find the IF leak at 12.105 
MHz, but it was -50 dBc, well within the requirements, if there was any 
accuracy at all to my test setup.  The preferred test method would be 
running into a dummy load through a Bird wattmeter using a calibrated 
sampling slug.

Ron N6AHA


----- Original Message ----- 
From: "Trevor" <virago at wildblue.net>
To: <tentec at contesting.com>
Sent: Sunday, July 09, 2006 11:02 AM
Subject: [TenTec] Orion-II 15m TX Spur?


> During the checkout of my new O-II I observed a significant spur on
> 11.8mhz while transmitting on 21.105mhz
> under the following conditions:
>
> Barefoot - no linear amp.
> "Out of the box" default settings - both VFO's on 21.105mhz - mode LCW
> on both - (A or B has the same spur)
> Tune - advance power level  from 1w to 55w spur is ~30db down - spur
> disappears at 50w through 100w.
>
> With amp (SB-220 or HF-2500) at 1kw there is no 11.8mhz spur  however
> should I wish to run QRP or reduced power up to 55w barefoot I have the
> spur.
> My spectrum analyser is 3 feet away from the rig so I took it to another
> part of the house and saw no difference in the spur amplitude.
>
> Anyone else see this? No spurs found on any other bands but have'nt
> completed my checkout yet.
>
> -Trevor AB5EU
>
>
>
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