NOTE: The $9.50 price plus shipping is for the
LED enhancement kit ONLY; The three Ludlum Geiger
counters seen in the above photos are NOT INCLUDED.
$9.50 each kit, plus shipping
Enhancement Modification Kit for
LUDLUM GEIGER COUNTER
Model 3 or Model 2 or Model 12
A spectacular improvement for your Ludlum!
To add ultrabright flashing LED lamp,
coordinated with "click" sounds!
No loss in sound volume at the speaker!
ULTRABRIGHT LED LAMP
This may be the brightest 5mm LED
lamp you have ever seen! It is
very much brighter than standard LED
lamps of earlier years. When seen
at night in darkness, the lens on
this round-top LED enables you to view
its light, even when reflected from
white paper at a distance of 20ft!
See the photos, above. The Ultrabright
Light-Emitting-Diode is mounted near
the piezo loudspeaker. When clicks are
heard on the side speaker, the LED lamp
does bright flashes! This is a grand
improvement for the Ludlum geiger counter
series. I have installed this LED on six
Ludlums of models 3, 2, and 12, all with
very successful results. It has not yet
been tested on other Ludlum models. If the
audio switch is turned off, the LED lamp does
not flash. The LED lamp connects to the piezo
speaker, and there is no noticeable loss of
sound volume from the side-speaker. This
geiger counter enhancement will be great for
you if your Ludlum is to be used in a noisy
location, or if the user is hearing-impaired!
NO SOLDERING ON THE
LUDLUM'S CIRCUIT BOARD
All soldering is done on the
two-conductor insulated wire
located near the piezo
loudspeaker, a safe distance
away from the circuit board.
NO SOLDERING is done on or
near the Ludlum's circuit board.
CHOICE OF LED LAMP COLORS
When you order, send me an Ebay memo
to identify your preferred LED lamp
color: COLOR CHOICES: white or green
or red or pink or blue or yellow.
If no color is chosen, then I will
ship a WHITE LED because the
white ultrabright LEDs have
the highest brightness.
WHAT YOU GET FOR
$9.50 PLUS SHIPPING:
Pre-wired ultrabright LED with resistor
(with two spare LEDs)
Set of 12 close-up color print photos
Two copies of typed instruction sheet
Bag of polyolefin heat-shrink insulation
tubing in the correct several sizes
3 pcs. red insulated wire, AWG22, 5" long
3 pcs. black insulated wire, AWG22, 5" long
6 pcs. small cable-ties
TOOLS AND MATERIALS
NEEDED BUT NOT ENCLOSED:
30 watt soldering iron, with rosin-core solder
Electric drill with 3/16" drill bit
Small round metal file (to ream out the mounting
hole drilled on side of Ludlum aluminum box)
Small butane cigarette lighter (to
heat the shrink-tube insulation)
Piece of duct tape, 2" x 3" (to secure
wires to inside of metal box)
Tube of adhesive cement (to fix LED lamp into
hole drilled near speaker on metal box)
FREE BONUS:
SUBSCRIPTION INFORMATION
FOR TRADE JOURNAL ON
LIGHT-EMITTING DIODES (LEDs)
Photonics Spectra
For the past 15 years, I have subscribed
to Photonics Spectra, the trade journal
for advancements in LED illumination
technology. With your purchase of the
Ludlum LED kit, I will enclose information
about Photonics Spectra. My subscription
has been free because I have a
university address.
CAUTION: This modification could void the factory warranty.
All my Ludlums were purchased used. But if yours is NEW, still covered
by the factory warranty, then you should NOT do this modification!
Any modification like this one is likely to void the factory warranty.
Install the modification on your older units, not on one that is new.
LED ENHANCEMENT KIT:
MADE IN USA
All Ludlum geiger counters are
made in USA by American workers
at Sweetwater,Texas; my
Ludlum LED enhancement
kit is made in USA at
Gallup NM.
$9.50 each LED enhancement kit, plus shipping.
================================
Stephen Buggie, psychology professor,
UNM-Gallup campus, Gallup NM 87301