Re: Lowe HF-150 Backlighting

On Thu, 31 Aug 2006 02:54:11 GMT, "Dale Parfitt"
<par@xxxxxxxxxxxxxxxxxx> wrote:

I thought I would repost this answer to a query on Racal backlighting for
those that might be interested in adding backlight to their HF-150. I have
no interest in doing the work, but creative individuals should be able to
duplicate my results:

While I have never done a backlight for the Racal, I have done numerous Lowe
HF-150. There, the procedure involves removing the foil backing from the
display while being careful not to remove the polarizing film that lies
directly beneath the foil.
Next a plexiglass *** the size of the area to be illuminated is uniformly
sanded on one side with very fine grit paper- the idea is to frost the
surface allowing light to escape from this front surface. A pair of slots
are milled into each end of the *** that will allow a T1 3/4 LED to press
axially
into the ***. (each LED will be "looking" towards the middle of the
***). Finally
an Avery self adhering white label is adhered to the back side of the plexi
***. I also polish all edges so that light will only escape out the
frosted front. The *** is finally sandwiched between the back of the
display and its socket.
Here is a Lowe HF-150 after backlighting:
http://www.parelectronics.com/pics/hf150bl.jpg

73,

Dale W4OP
for PAR Electronics, Inc.

http://www.glowbug.com/index.php?main_page=product_info&cPath=13&products_id=141
.

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