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Re: [TenTec] Orion firmware statistics and drift info

To: "'Discussion of Ten-Tec Equipment'" <tentec@contesting.com>
Subject: Re: [TenTec] Orion firmware statistics and drift info
From: "Grant Youngman" <nq5t@comcast.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Tue, 7 Feb 2006 20:56:19 -0800
List-post: <mailto:tentec@contesting.com>
> I have noticed this problem and installed a CPU fan to blow 
> across the top on the Orion and this keeps the heat build up 
> down considerably.  I hung the fan under the shelf above the 
> Orion attached with velcro strips from Radio Shack.  The top 
> of the rig stays very cool and the rig does not drift nearly 
> as much. 

Yes, of course.  I have yet to see my II over +- 5 hz using a GPS stabilized
oscillator as a reference, and tracking frequency over about 60 minutes
after turn on.  That's with no fans or other stuff.  Far better than the
Orion, which whould drift a few hertz more during warmup (but nothing that
anyone would ever notice).  My Orion would stabilize at around 15 hz high.
My O-II stabilizes at 1-2 Hz high.  

In either case, it's an interesting measurement.  But I have yet to have
anyone give me the "you're a little high, OM" comment :-)


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