[Drake] Xtals for Drake 2A

[Brian]

The vast majority of LEDs are not designed nor intended to have AC voltage applied to them.  In fact, doing so can destroy the LEDs as their reverse breakdown voltages are not very high.  In light of that fact some manufacturers include a reverse connected red LED in parallel with the main LED which acts as a 2.2 Volt clamp.  When I ran the LED lighting program for my former employer I had some customers call complaining that their LEDs were emitting red light instead of white.  Why?  They installed them backwards.  That said you may get away with very low AC voltages but I wouldn't bank on it.

Sent from my iPad

> On Apr 7, 2014, at 3:17 PM, bonddaleena at aol.com wrote:
> 
> Agree. I use LEDs in all my Drakes, Swans, etc. People forget they are a 'diode' and work perfectly on AC. At least every one I have ever used....
> 
> ron
> N4UE
> 
> 
> 
> 
> 
> 
> 
> -----Original Message-----
> From: L L bahr <pulsarxp at embarqmail.com>
> To: David Harmon <k6xyz at sbcglobal.net>
> Cc: Drake <Drake at mailman.qth.net>
> Sent: Mon, Apr 7, 2014 3:30 pm
> Subject: Re: [Drake] Xtals for Drake 2A
> 
> 
> MY lamps don't flicker in any Drake gear.  Maybe you are using a different 
> manufacturers lamps.  Mine work perfect.
> Lee, w0vt 
> 
> ----- Original Message -----
> From: "David Harmon" <k6xyz at sbcglobal.net>
> To: Drake at mailman.qth.net
> Sent: Monday, April 7, 2014 11:20:42 AM
> Subject: Re: [Drake] Xtals for Drake 2A
> 
> I tried that with Collins and couldn't stand the constant strobe-like
> flicker effect from the ac voltage powering the LED's.
> If the lamps were on dc voltage....that might be ok.
> 
> 
> 73
> 
> David Harmon
> K6XYZ
> Sperry, OK
> 
> -----Original Message-----
> From: drake-bounces at mailman.qth.net [mailto:drake-bounces at mailman.qth.net]
> On Behalf Of L L bahr 
> Sent: Monday, April 7, 2014 11:14 AM
> To: hbreuer at debitel.net
> Cc: Drake at mailman.qth.net
> Subject: Re: [Drake] Xtals for Drake 2A
> 
> To keep the main dial back plate from yellowing again,  I am installing
> three LED replacement lamps for all the #47 lamps (3) in the radio.  The
> three LED 47 replacements put out equal to #47 lamp lighting.  I buy them
> from pin ball parts firms for 99 cents each.  They put out very little heat
> and don't burn out.  Of course I'm using white ones for the 2A but the three
> LED BLUE ones work greak in other Drake gear using BLUE filters.  With the
> BLUE LED lamps I remove the BLUE filters from the radios.
> Lee, w0vt
> Houston, Texas
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