OTARI MX-5050MKIII-2, Operation Manual

Page: 28 / 48

5.3 EQUALIZER CHANGE
The equalizer between the NAB or the IEC can be changed by sliding
EQUALIZER selector switch on the rear panel of the amplifier unit.
However, a fine equalizer adjustment and a record level set are
required.
Table 5-1 Record Level
Reference
Fluxivity Relative
Level
Test Tape
Recording Tape
to be used
185 nWb/m* 0 dB
Ampex Operating
Level Scotch 177
Ampex 641
250 nWb/m* +2.6 dB NRL NAB Standard
Scotch 206, 207,
226, 250
Ampex 406, 407,
456
320 nWb/m** +3.8 dB
BASF or MRL
IEC Standard
IEC Equalization
* Short circuit flux.
** Open circuit flux.
5.4 LINE VOLTAGE CONVERSION
The line voltage is converted by resoldering the wiring on the
voltage selection terminal, proceed as follows:
1. Remove two flat head socket cap screws (marked A in Fig. 5-5)
putting the ventilation channel.
Remove four cross-recessed screws (marked B in Fig. 5-5) on
the top ventilation cover (transport rear panel) from the
rear of the equipment.
2. Draw out three connectors of ERASE/RECORD HEAD, REPRODUCE
HEAD, TO AMP (Refer to Figure 5-5), and place the machine
on its s i d e .
3. Resolder the lead wire of the voltage selection terminal on
the supply reel Ass'y to the desired voltage terminal marked
as shown in Figure 5-4.