Labo
★
K
Effects –
www.labo-k-effects.com
–
9
interconections
To facilitate the implementation of these
Neve 51 modules,
interconnections boards have
been developed. These cards use double sided plated through holes printed circuit
boards (PCBs)
.
To connect the preamp and EQ modules to these cards
, originals flat
cables of the channelstrips are used. This boards also allows PSU connections
and
distribute various voltages to modules. Finally, inputs and outputs connectors are also
wired to the card.
This allows to easily extract modules for possible maintenance.
An output attenuator controlled by a potentiometer on front panel is connected between
the buffer and the output stage of each channel
.
This potentiometer replaces the console fader.
This allows to push the gain of the modules without saturating the input of the device
wherein the rack is connected if the latter does not have the input setting.
Internal adjustments
Warning !
These settings should be performed by a qualified person.
Output level :
1)
Inject a 0dBm 1khz sinus signal in Line input.
2)
Plug a dB-meter on channel output connector.
3)
Set Line gain selector on 0dB.
4)
Set Trim pot on 0.
5)
Make shure that filters, equalizer and Dynamics are disabled.
6)
Set level pot on max if fitted.
7)
Adjust VR2 on Insert Out board (on the equaliser module) to read 0dBm on dB
meter on the output connector.
Signal indicator thtreshold :
1)
Inject a 0dBm 1khz sinus signal in Line input.
2)
Set Line gain selector on 0dB.
3)
Adjust VR1 on 51 Input Interface board to make the signal led blink.
It is possible to choose another threshold value than 0dB.
Just apply the wished level to the input of the module and then adjust the trimmer VR1
as indicated higher.
Remember !
The modules in this rack are vintage pieces.
They are over 30 years old.
Moisture, heat and smoke are the enemies of this unit.
