BRUEL & KJAER 2619 - 3 Operation; Power Supply

3. OPERATION
3.1 POWER SUPPLY
All the necessary power supplies are connected when the preamplifier is
plugged into the CONDENSER MICROPHONE socket of one of the B&K
Analysing I nstruments, or microphone power supply. Normally 120 V DC is
required, but it is possible to operate the 2619 from a single 28 V supply.
The connections at the plug are shown in Fig.3.1. Pins 5 and 6 should be
connected together for 28 V operation.
P I ns 5 & 6 short e d for operat i on
trom 2S V only
Signal
~ -.--- ------- - "'"
~ 4 ' "
5 ~ 120 V DC Supply
\ '
3
\
28 V DC Supply
Ground "
(Heating element) ~ . -;/"
---- -----
u~
Casing to outer screen
l oo k ing at pins f r om ou ts ide
Fig. 3. 1. Pin connections.
,::r:r o703
If separate power supplies are used , a seven pin socket (JJ 0018) suitable
for making connections to the plug can be obtained from B&K.
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