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[TenTec] Orion LCD screen darkening

To: tentec@contesting.com
Subject: [TenTec] Orion LCD screen darkening
From: Ken Brown <ken.d.brown@verizon.net>
Reply-to: tentec@contesting.com
Date: Fri, 17 Sep 2004 14:15:33 -1000
List-post: <mailto:tentec@contesting.com>
Hi all,

I am not an Orion owner, nor have I had the opportunity to operate one. However I have read a lot of the posts regarding various virtues and faults in the Orion. The "screen darkening" has been mentioned often enough in unemotional postings, that I believe it is a problem that really exists in many of the Orions. I have seen the addition of a fan mentioned as a cure for this problem. Since the darkening is not uniform across the whole display, it occurs to me that the cause of the problem is not only excessive heat, but also non-uniform temperature across the display. I wonder if either instead of or in addition to adding a fan, it might be worth while to place a highly heat conductive plate behind the LCD panel. The plate would conduct heat such that the temperature would be more uniform across the back of the display. Some insulation on the opposite (from the display) side of the conductive plate might help also. This could simply be a piece of copper clad printed circuit board material, with dimensions equal or larger than the display panel. If it is single sided PCB material the copper side would be closest to the display panel. Maybe double sided would be even better. Since I have never seen an Orion, I do not know whether there is room for such a plate, or an easy way to attach it to the back of the display. Just a suggestion.

DE N6KB


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