[TenTec] Omni VI Meter Lamp dimming

[Duane A Calvin]

Yep, my Omni VI+ did the same thing.  Always did.

        73, Duane

On Sat, 11 Feb 2006 12:15:44 -1000 Ken Brown <ken.d.brown at verizon.net>
writes:
> The meter lamps on my Omni VI dim noticeably when either the VOX or 
> SPLIT LEDS are lighted. It is doubtful that this is due to a power 
> supply lead voltage dropping from the increased load of the LEDs, 
> for 
> two reasons. The amount of current the LEDs use is probabaly less 
> than 
> 20 mA each, and the controlled voltage source for the meter lamps is 
> on 
> a completely different board, the Low Level Driver Board. So the 
> amplitude or duty cycle of the "digit driving pulses" coming from 
> the 
> LED Display Drive Board must be changing when the SPLIT or VOX LEDs 
> are 
> turned on. This doesn't seem right.
> 
> Anyone else with an Omni VI notice this, or know what the cause is?
> 
> I also found some inconsistancies in the LED Display Board 
> Schematic. 
> Several of the seven segment displays have two "CAT"s and no "COL", 
> 
> which I presume are cathodes and collectors. And a bunch of the 
> "CAT"s 
> and "COL"s show no connection. Doesn't seem right.
> 
> DE N6KB
> 
> 
> 
> 
> 
> _______________________________________________
> TenTec mailing list
> TenTec at contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
> 
> 


--------------------------------------
Duane Calvin, AC5AA
Austin, Texas

http://home.austin.rr.com/ac5aa