Subject: [drakelist] LED replacing lightbulbs
From: eqtc{at}xs4all.nl


eqtc{at}xs4all.nl made an utterence to the drakelist gang
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Hi all,

Thanks to the very kind assistance of Don WB5HAK and Rob PE9PE, my TR7 is
now again close to it's condition when it left the factory :))

Now that I had the TR7 apart, I took the oppertunity to find a solution
for the annoying problem of the ever breaking light-bulbs. Especially
replacement of the one behind the dial is a big job as the entire DR7 has
to be lifted. Also the supply of bajonet lightbulbs is not eternel I
suppose...
So I decided to go for a LED-solution. The white LEDS used in modern
flashlights are very light-intensive. The only problem is that their beam
is very focussed. So what I did is cutting the front side of the LED
untill it was flat, keeping 1 mm plastic between the LED and the front. I
made the surface rough with sandpaper and in this way the light "diffuses"
very nicely. I installed it in the house of the old bulb, a resistor of
220 Ohms in series.
Result is very very nice, even the typical Drake "blue glow" is now much
more intense! Highly recommended though, so thought I should mention it to
the list.

Best 73 and see you on the waves with my "new" TR7!

Dick/PA2DW
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