[Boatanchors] Re QST article 'LED your pilot lamps'

Mon, 22 Sep 2003 19:49:15 -0700 (PDT)

Use dual LEDS. They have a RED and GREEN led back to back (gives you ORANGE)in one package...

Rodney
VK2KTZ

--- rkerr <[email protected]> wrote:
> I'm not sure what "current balance" means here, as I think the LED's 
> would pull less current than an incandescent lamp.  I suppose if you 
> replaced a large number of these lamps with LEDs in the same 
> unregulated circuit, the voltage might rise a bit because of the 
> reduced current.
> 
> In any case, be sure to look up the later addendum to this article in 
> the Oct QST which concerns the reverse voltage rating of LEDs and 
> whether or not you should connect two diodes in parallel, with the 
> diodes in opposite directions, to prevent reverse voltage avalanche.  I 
> would also connect a 0.01 uF or so capacitor in parallel with the 
> diode(s) to snub high frequency signals generated by the rectification 
> transients.
> 
> Bob
> WB4TGG
> 
> 
> 
> On Monday, Sep 22, 2003, at 15:10 US/Eastern, R.J. Keller wrote:
> 
> > While I was reading the article in Sep QST about using LED's for the
> > pilot lamps, I remembered from one of the lists somebody talking about
> > making changes like this and it's effect on the current balance in the
> > filament circuits. What are your thoughts on this.
> > Thanks and 73, Dick KF4NS
> > St. Petersburg, FL 33714 USA
> > Keep the glow!
> 
> __________________________
> Robert R. Kerr
> Senior Research Engineer
> Georgia Tech Research Institute
> office: 770-528-7549
> cell:    404-441-4226
> FAX:   770-528-7083
> [email protected]
> 
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