[MRCA] Need Burned out R1051 Dial Lamps

[Edward Larsen]

At the Navcommsta Diego Garcia receiver site in 1981 we had about 30 R-1051
receivers.  We'd stock the small bulbs by the case.  Not a good
illumination design.
73
KI6R, Tucson

On Sun, Feb 2, 2025 at 9:55 AM Daniel Jones <djones at k6yic.com> wrote:

> Good Morning,
>
> I am working on a solution for the R1051 dial lamp issue (Early models
> that need the bulb replaced from the back not on the front).  The
> Manufacturing of these bulbs has stopped pushing the prices on auction
> sites to $50 each (Not great for a bulb that doesn’t last long).
>
> I have found a solution of replacing the bulb in an old burned out socket
> with a warm white LED and changing out the resistors on the power supply
> PCB to lower the voltage to 3v.  I have been running a test on one that I
> created on the bench and it has been running for couple weeks nonstop at
> 28v.
>
> I figure this mod should cost roughly .50 in parts and about 15 minutes of
> my time to create the bulb and another 15 minutes to swap the resistors on
> the PCB.  I am not ready to call it perfect yet and tell people I will fix
> their bulbs also, I need to do a couple more to perfect the method so you
> wouldn’t get shoddy work back.
>
>
> Needless to say I need your burned out bulbs and if anyone has a pile of
> them and is willing to send me a few I would be grateful.  This could solve
> a problem for all of us that have R1051s/T827 ect…
>
>
> Thanks,
> Daniel
>
>
>
> Daniel Jones (K6YIC)
> DJones at k6yic.com
> http://K6YIC.com
> HH Phone #11973
> SKCC#28598
> CCA# AC20-13565
>
>
> [image: PastedGraphic-2.tiff]
>
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