[R-390] Dial Lamps

[Bob Camp]

Hi,

There was a thread a while back about taking a dead light apart. You then
installed a dropping resistor and a small LED in the base. The net result
was a half wave rectifier and a test for the reverse breakdown of the LED
being > 10 volts. The main problem mentioned was that the LED used was a
narrow beam type and it didn't light up the window as well as a pilot light.

    Take Care!

        Bob Camp
        KB8TQ


----- Original Message -----
From: "Scott, Barry (Clyde B)" <cbscott@ingr.com>
To: <r-390@mailman.qth.net>
Sent: Friday, January 03, 2003 12:23 PM
Subject: RE: [R-390] Dial Lamps


> At the rate I've been using my R390A (or any radio gear for that matter)
these days, my 328's will potentially last forever so I don't really need to
worry about this...sigh...
>
> Aside from the RFI issue, I was thinking someone made direct replacements;
the dropping resistor is built into the unit.  Was I mistaken?  Perhaps not
the 328?
>
> Barry - N4BUQ
>
>
> > Hi,
> >
> > The LED's work and they aren't all that expensive these days.
> > Digikey has
> > some *very* bright ones for a couple of bucks each. Compared
> > to say a R-1051
> > there's a lot of room in a R-390A to mount a couple of them
> > and a dropping
> > resistor.
> >
> > The main issue is the same one we keep chasing all over the
> > place here. They
> > are DC parts so you have the possibility of RFI when you put them in.
> > Running two back to back still gives you a non linear load.
> > Anything non
> > linear and you get crud.
> >
> >     Take Care!
> >
> >         Bob Camp
> >         KB8TQ
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