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Re: [TenTec] Omni VI Meter Lamp dimming

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] Omni VI Meter Lamp dimming
From: Ken Brown <ken.d.brown@verizon.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sat, 11 Feb 2006 16:22:51 -1000
List-post: <mailto:tentec@contesting.com>
Thanks Larry and Jim,

Well, I'm not overly concerned about it. It doesn't have any affect on the RF/AF performance of the radio, which is what really matters to me. I just happened to notice it and then decided to peruse the schematics, to try to figure out the mechanism by which it occurs. I thought I was going to find something really simple, such as the LEDs and the 47 lamps being fed by the same supply, through a common connector. Then I was going to say to myself "that connector must have high resistance and the little bit of additional current drawn by the LED is enough to drop the voltage to the #47 bulbs so that I can see them dim. I'd better clean that connector." Much to my surprise, it is much more complicated than that, and I cannot come up with a simple explanation.

Sort of interesting all the somewhat unrelated circuits that are on the Low Level Driver Board. Noise blanker, light dimmer and the low level driver.

N6KB




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