Operator’s Manual
The 830 all-tube power amp not only delivers top-notch tube
tone and 2x50 watts (model 830.30, 2x30 watts) of power, it also
incorporates a number of technical advantages and practical
features.
The two A and B Presence controls enable you to activate two
different treble presets at the power amp. The Gain switch provides optimum signal level adjustment at both inputs. Separate
Standby switches provide a single p.a.side operation option.
The integrated ECS (Emergency Circuit System) protects the amp
from damage due to power tube defects/failure and ensures the
amp does not shut down. It continues to function on both
channels; the affected channel operates at a reduced power
output level.
This amp is defined by the effort and materials that went into it:
intelligent design features, superior craftsmanship, impeccable
finishing and quality components. However keep in mind, that a
few precautions will radically extend tube life (see handling and
care guidness).The entire -Team would like to thank you for
your faith in our product; we hope you derive a great deal of joy
and satisfaction from your -TUBE POWERAMP 830.
PLEASE NOTE: Read the Operator's Manual carefully and
thoroughly, especially the Handling and Care section as well as
the guidelines in bold-face type. Avoid operating errors and
potential damage to the amp by heeding the guidelines and
cautionary remarks in this manual. The footnotes also cover a few
convenient pointers and interesting tips on several functions.
These are listed on side 3 of the manual.
Please, first read this manual carefully!
Front Panel
The Presence A/B switching function can be executed via a Looper
or other MIDI devices that feature a freely-programmable switching
input. If the ground and the circuit are identical in the MIDI device
then you may encounter ground hum.
A practical application of the PRESENCE switching feature in
conjunction with a dual channel preamp (clean/lead): PRESENCE A
controls set between the 1 and 4 o'clock positions; PRESENCE B
controls set between the 8 and 11 o'clock positions. Activate
PRESENCE A in the clean mode and PRESENCE B for the lead mode.
You can also access two different tonal variations in each of the
operating modes (i.e. clean & lead) using the PRESENCE function as
described in this example.
This amp is designed for one speaker cabinet per channel. If you
decide to connect additional speakers, ensure you keep the overall
impedance in mind! For instance, if you want to connect two 8Z
systems per side, you must first connect them in series and then to
the amp's 16Z outputs. The -Speaker Cabinet Extension offers
a number of options, right up to four cabinets per channel.
If you are using a stereo speaker for both channels, ensure it actually
operates in the stereo mode, otherwise you may damage the power
amp. A convincing stereo image is achieved via a quality stereo
effects processor and a separate speaker for each channel.
The 830.30 model is perfectly suited for studio-recording or club
gigs. Additionally it offers the advantage to reach tube poweramp
distortion at a moderate volume with authentic sounds.
TIP3
TIP2
TIP1
Presence A/B
Switching from PRESENCE A to
PRESENCE B
1.Position Off:
PRESENCE A active
2.Position On (pushed in):
PRESENCE B active
red LED indicates PRESENCE B active.
PRESENCE A/B switching can be executed
via footswitch;
the PRESENCE A/B switch is then inactive
TIP1
12 3 45678 9101112 1314
Gain(Lo/Hi)
power amps’ input sensitivity
Presence B Left
treble control B in the power amp, left channel
Presence A Right
treble control A in the power amp, right channel
Presence B Right
treble control B in the power amp, right channel
Power Tube Fuse
power tube fuse (ECS) for tube
pair V6 und V7 (830.50)
LED indicates defective fuse
In model 830.30:
tube pair V4 und V6
Power
AC power on/off
Presence A Left
treble control A in the power amp, left channel
Standby Right
right channel standby
Standby Left
left channel standby
Power Tube Fuse
power tube fuse (ECS) for
tube pair V10 und V11 (830.50)
LED indicates defective fuse
Power Tube Fuse
power tube fuse (ECS) for tube
pair V8 und V9 (830.50)
LED indicates defective fuse
In model 830.30:
tube pair V9 und V11
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Volume Right
volume control for the right power amp
Volume Left
volume control for the left power amp
15
Power Tube Fuse
power tube fuse (ECS) for tube
pair V4 und V5 (830.50)
LED indicates defective fuse
Rear Panel
Technical Data
Caution: Replace fuses only with others of the same rating
Rated power
Tube array
2x50 Watt (model 830.50)
2x30 Watt (model 830.30)
GAIN Lo: -15 dB max. 15 dB
GAIN Hi: -30 dB max. 0 dB
830.50:
V4,V5,V6,V7-> EL84, matched set
V8,V9,V10,V11-> EL84, matched set
830.50
Outlet each channel
Input level
Tubes
1x8 Z , 1x16 Z
Fuses
app.12 kg
830.30:
V4,V6-> EL34, matched set
V9,V11-> EL34, matched set
V1-> ECC83/12AX7 selected
V2,V3-> ECC83/12AX7 standard
Power Amp (ECS): 4x160m AM
100V und 120V
5 AM medium
6,3 A T slow
AC Mains
external
internal
230V
2,5 AM
3,15 A T
830.30
100V und 120V
2,5 AM
3,15 A T
230V
1,25 AM
1,6 A T
Power Amp (ECS): 2x160mAM
Dimensions
Weight
19', 2 rack spaces, depth: 300mm (not including handles),
Fan
Power
Transformer
Internal Fuse
V4 V5 V6 V7 V8 V9 V10 V11
Left Side Right Side
V1
V2
V3
V4
+
V5
V6
+
V7
V8
+
V9
V10
+
V11
V4
+
V6
V9
+
V11
Power Tube Fuses
(ECS)
830.30
830.50
Left Output
Transformer
Right Output
Transformer
Front Panel
Left
Right
BIAS
AC Mains
external
internal
Footswitch Presence A/B
1/4" footswitch jack for PRESENCE A/B
switching between PRESENCE A and PRESENCE
B
TIP3
AC Socket
connect AC cord here
ATTENTION: Ensure you use an intact AC cord
with an insulated plug only! Before you power the
amp up, ensure the voltage value printed above
the AC socket corresponds to the available current.
Fan Shaft
ultra-quiet fan ensures your amp remains
cool; hot air escapes via this shaft.
ATTENTION: Install the amp in a 19" rack
in such a manner as to ensure air
circulation is not impeded. Do not block or
cover the fan shaft and side coolant vents.
Speaker Output 16 Ohm, Right
16Z right channel speaker output jack;
connect 16Z speaker cabinet here
Speaker Output 8 Ohm, Right
8Z right channel speaker output jack;
connect 8Z speaker cabinet here
Speaker Output 16 Ohm, Left
16Z left channel speaker output jack;
connect 16Z speaker cabinet here
Speaker Output 8 Ohm, Left
8Z left channel speaker output jack; connect 8Z
speaker cabinet here
IMPORTANT: If you choose to use just one power
amp channel, ensure you switch the other channel's
STANDBY switch off. Never operate an active stereo
channel without a connected speaker, you may
destroy the power amp!
AC Fuse Box
contains mains fuse (rear chamber) and spare
fuse (front chamber) NOTE: Ensure replacement
fuses bear identical ratings (refer to the table)!
20
16
17
18
19
23
24
25
21
22
Input Right
Signal input to right power amp
16 17 18 19 20 21 22 23 24 25
Input Left
Signal input to left power amp
TIP2
Protect the amp from mechanical knocks (tubes!)
Let the amp cool down before you transport it (app.10 minutes).
Tubes need about 20 seconds to warm up after you switch the power on
Avoid storing the amp in damp or dusty rooms, they are hard on jacks, switches
and potentiometers.
Ensure air can circulate at the rear and both sides of the amp to allow for
adequate cooling (increases component life).
Never operate the amp without an adequate load
Replace tubes with select replacement tubes (special selection criteria)
to avoid microfonic properties, undesireable noise and unbalanced performance
Handling and Care
·
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This circuit ensures the amplifier does not shut down completely when a
single power tube failes. You can continue to play,but the affected
channel's output power is reduced by 2/3rds (depending on the type of
defect, in the 830.30 the power of the affected channel will nearly be 0).
Gas developing in the power tubes can cause a momentary short circuit.
The fuse activates, but the amp is not shut down! Often the tube absorbs
the developed gas,and is operable after a short circuit. Usually the
problem can be rectified by replacing the fuse,but if the new fuse activates
as well,the defective power tube needs to be replaced.
E C S (Emergency Circuit System)
·
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·
·
·
·
·
·
·
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We reserve the right to make unannounced technical upgrades!
Attention! Please read the following!
This Amp is in a position, to produce high volume levels. Exposure to
high volume levels may cause hearing damage!
Leave tube replacement and power amp biasing to a qualified
professional. Ensure the unit is switched off and unpluged!
Caution -tubes can get very hot and cause skin burns.
Always use high-quality cables.
Never operate the amp through an ungrounded outlet!
Never bridge a defective fuse and ensure replacement fuses feature identical
ratings!
Pull the AC mains plug before replacing fuses!
Never open the chassis or attempt repairs on your own. Consult qualified
service personnel!
Never expose the amplifier to extreme humidity or dampness!
Please read the instructions carefully before operating the unit!
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