Rear Panel
Fuse:
External mains fuse. For values refer to "technical data".
NOTE:
The value must correspond to the available current.
CAUTION:
Ensure replacement fuses bear identical ratings (refer to the table below)!
Fan Off/On:
This switch deactivates the fan: This option can be usefully during studio
recording jobs.
CAUTION:
Due to high heat generation (tubes) the amplifier should not be operated
without the fan for a longer time period!
Voltage selector:
This selector must be set to the correct value that corresponds to the
available current, e.g. 120 Volts in the U.S., 220 Volts in Germany, etc.
CAUTION:
Before you power the amp up, ensure the voltage value set at the voltage
selector corresponds to the available current.
Footswitch:
8 Pin connector for connecting the custom footcontroller: You can access
the Presets (Program number selection) and Manual mode via this
floor switchboard.
Write Off/On:
(only included in the newer Digitalamp version!) This key switch can be
used to disable the Write function at the front panel of the amp.
You can protect the stored Presets against unintentional overwriting or
any manipulation from other people if you like.
Line Out:
Line output routed from the power amp; 0 dB level; not frequency
corrected (compensated).
Send:
Signal output for the FX Loop. Connect this output to a FX unit’s
input/return jack via a shielded cable with 1/4" plugs.
Return:
Signal input for the FX Loop. Connect this input to a FX unit’s
output/send jack via a shielded cable with 1/4" plugs.
4 ohms parallel:
4 ohms speaker output jacks, internal connected parallel.
For diverse cabinet options see the next chapter on this page!
8 ohms:
8 ohms speaker output jacks, the internal 8 ohms speaker (Combo) is
connected to this jack. For diverse cabinet options see the next chapter
on this page!
IMPORTANT NOTE:
Never operate the amplifier without a sufficient load, otherwise you may
damage or destroy the power amp! Ensure your cabinet’s specifications
match the respective output’s specs.
Choose only one of the following cabinet options:
A:
One 4 ohms cabinet connected to a 4 ohms jack (without the internal
speaker in the Combo!);
B:
An external 8 ohms cabinet and the internal speaker of the Combo
connected to the 4 ohms jacks. When you unplug the cable for the
external cabinet, ensure you plug the internal speaker back into the
8 ohms jack!
Two external 8 ohms cabinets connected to the 4 ohms jacks (Head);
C:
Internal speaker only, connected to a 8 ohms jack (Combo),
one 8 ohms cabinet (Head);
D:
Two 16 ohms cabinets connected to the 8 ohms jack (without the internal
Combo speaker!) with an y-adaptor or an through jack at the cabinet.
Technical Data:
R
ated output power:
approx. 100 watts at 4 or 8 ohms.
Tubes:
V1: ECC 83 / 12AX7, FQ selected;
V2: ECC 83 / 12AX7, selected;
V3: ECC 83 / 12AX7, standard;
V4 - V7: 6L6GC matched sets in the earlier amp version.
V4 - V7: EL34 matched sets in the newer amp version.
mains fuse external:
at 230 mains voltage: 2,5 AT(slow);
at 100 and 120 mains voltage: 5 AT (slow);
mains fuse internal:
3,15 AT (slow)
Anode fuse:
2 x 1,25 A
IMPORTANT:
Always make sure replacement fuses are of the same type and have the same
ratings as the original fuse!
Memory System:
conventional designed digital controlling system (no microprocessor) including
two RAM circuits. 5 Bit A/D - D/A conversion.
(the design of the memory system took place in the early eighties!)
Data retention:
2 x NiCd Accu-cells each 1.2 volts, approx. 250 mAh.
Note:
If the amplifier is not in use for a longer period of time, the content of the
Presets may be lost. In this case we recommend to let the amp switched on for
a several hours to give the batteries some time for recovery.
NiCd accumulators have a restricted life time, if the content of Presets get
lost after the amp is switched off, let check the batteries by a service technician;
possibly they need to be replaced.
Please note and take care of the waste disposal rules for old and defective NiCd accumulators!
