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POWER SUPPLY:
• The portable internal power supply is a 4 cell NiCd battery
pack. The original packs are now 43 years old and should be
replaced. Good NiMH batteries are an excellent
replacement but will take longer to charge using the
supplied adapter.
• Pictured is the original EA-21A
adapter. It may be
substituted by another 8.2V
DC 120 / 240 switching power
supply *BUT*, the outer
surface of the plug is
POSITIVE and the internal
connection is NEGATIVE.
Therefore, be very careful
when selecting a new adapter
as the wiring for the plug may
have to be reversed.
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