External Battery Connection; Battery Replacement - Heathkit mMATIC SA-5010A Manual

Memory keyer
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EXTERNAL BATTERY CONNECTION

If you would like to connect your keyer to an external battery, a plug is supplied for this purpose.
Wire the plug as shown in Pictorial 6-6. You can wire the plug without concern for polarity, due to
the diode bridge in the keyer. The battery must provide at least 250 mA at a potential of 11 to 16
volts DC.

BATTERY REPLACEMENT

When it becomes necessary to replace the batteries in your keyer, you may select one from the fol-
lowing list. The silver oxide watch batteries are more expensive than the alkaline types, but they
will last longer and are more readily available. NOTE: Leave the keyer plugged in when you are not
using it to prolong the battery life.
Eveready
Mallory (Duracell)
or
Ray-O-Vac
Varta
BULOVA
* Alkaline
** Silver Oxide
RANDOM CODE PRACTICE
On the following pages, ten of the 6400 random code sequences available in the practice mode are
listed. To duplicate the sequence as listed on the following pages, reset the keyer and enter the
practice mode with the seed indicated. (As noted in the section "Code Practice", each time you
turn on the keyer on without being reset, each of these sequences will be modified.
PICTORIAL 6-6
A76*
S76**
357**
D357**
10L14**
RW42**
V13GA*
228**
TIMEX
MAXELL
or
SEARS
SEIKO
RENATA
Other names are: G13, LR44, A76, SR44W,
GP76A, 357 for Alkaline batteries.
- 13 -
J**
G13
SR44W**
8006**
SB-B9**
7

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