

(Photos from Steve Schlink)
Normally the front panel is flat and featureless.
When the handset is lifted, the numbers are illuminated from below.
Just tap the numbers to dial.
If you run your finger over the surface, you can feel slight ridges in
a grid pattern around the numbers.
As you approach a ridge, the tone stops. After crossing into the
next area, the tone for that digit sounds.
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The illumination comes from a bank
of 10 incandescent lamps mounted on a circuit board, which makes
user replacement possible.
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Each bulb has its own holder and is
stamped "56."
Specifications for a standard #56 miniature bulb are:
5 Volt 0.115 Amp
T1-3/4 Sub-Miniature Glass Wedge Base
0.15 MSCP C-2R Filament Design.
20,000 Average Rated Hours
0.80" Maximum Overall Length.
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Power is supplied by a captive
(hardwired) transformer that plugs directly into a wall outlet.
3110C TRANSFORMER
WESTERN ELECTRIC CO.
120V 60HZ 7W
SEC 5.0V 5.6VA
CAUTION
INDOOR USE ONLY
LISTED PLUG-IN
31B6 CLASS 2
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Glow Phone - Internals
This is definitely not your Father's 500 set!
Includes several Western Electric integrated circuits:
677N dated III-82 (left rear under ribbon cable)
677G dated I-83 (right of ribbon cable connector)
502HY dated 1282 (right rear)
The "OFF" pushbutton (left rear) is for ringer cutoff.
The slider (left front) is for ringer volume.
The carrier for the lamp circuit board is the central column on the top
plate. Power is supplied through the red and white wires.
Please let me know if you have a copy of BSP 503-200-134 which covers
the Glow Phone.
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For comparison, here is the
internal view of the Big Button Phone, which uses similar components
and packaging.
Includes several WE integrated circuits:
677H dated III-82 (left rear)
677G dated IV-82 (right of ringer cutoff switch)
502HY dated 0183 (right rear)
The "OFF" pushbutton (left rear) is for ringer cutoff.
The slider (left front) is for ringer volume.
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