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.
Operator’s Manual
Please, first read this manual carefully!
Front Panel
TIP1
TIP2
TIP3
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.
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.
12 3 45678 9101112 1314
1
Gain(Lo/Hi)
power amps’ input sensitivity
Volume Left
2
volume control for the left power amp
Volume Right
3
volume control for the right power amp
Presence A Left
4
treble control A in the power amp, left channel
Presence B Left
5
treble control B in the power amp, left channel
Presence A/B
6
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
9
Power Tube Fuse
power tube fuse (ECS) for tube
pair V4 und V5 (830.50)
LED indicates defective fuse
Power Tube Fuse
10
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 Tube Fuse
11
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
Power Tube Fuse
12
power tube fuse (ECS) for
tube pair V10 und V11 (830.50)
LED indicates defective fuse
Standby Left
13
left channel standby
Standby Right
14
right channel standby
Power
15
AC power on/off
15
Presence A Right
7
treble control A in the power amp, right channel
Presence B Right
8
treble control B in the power amp, right channel
Rear Panel
Technical Data
16 17 18 19 20 21 22 23 24 25
AC Socket
16
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.
AC Fuse Box
17
contains mains fuse (rear chamber) and spare
fuse (front chamber) NOTE: Ensure replacement
fuses bear identical ratings (refer to the table)!
Speaker Output 16 Ohm, Right
18
16Z right channel speaker output jack;
connect 16Z speaker cabinet here
19
Speaker Output 8 Ohm, Right
8Z right channel speaker output jack;
connect 8Z speaker cabinet here
TIP2
Speaker Output 16 Ohm, Left
20
16Z left channel speaker output jack;
connect 16Z speaker cabinet here
Speaker Output 8 Ohm, Left
21
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!
Fan Shaft
22
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.
23
Footswitch Presence A/B
1/4" footswitch jack for PRESENCE A/B
switching between PRESENCE A and PRESENCE
B
TIP3
Input Right
24
Signal input to right power amp
Input Left
25
Signal input to left power amp
Rated power
2x50 Watt (model 830.50)
2x30 Watt (model 830.30)
Outlet each channel
Input level
1x8 Z , 1x16 Z
GAIN Lo: -15 dB max. 15 dB
GAIN Hi: -30 dB max. 0 dB
Tubes
V1-> ECC83/12AX7 selected
V2,V3-> ECC83/12AX7 standard
830.50:
V4,V5,V6,V7-> EL84, matched set
V8,V9,V10,V11-> EL84, matched set
830.30:
V4,V6-> EL34, matched set
V9,V11-> EL34, matched set
Fuses
830.50
AC Mains
external
internal
230V
2,5 AM
3,15 A T
100V und 120V
5 AM medium
6,3 A T slow
Power Amp (ECS): 4x160m AM
830.30
AC Mains
external
internal
Power Amp (ECS): 2x160mAM
Caution: Replace fuses only with others of the same rating
Dimensions
Weight
Tube array
Left Output
Transformer
Right Output
Transformer
19', 2 rack spaces, depth: 300mm (not including handles),
app.12 kg
Fan
Left Side Right Side
V4 V5 V6 V7 V8 V9 V10 V11
BIAS
V2
V1
V3
Left
Right
830.30
830.50
Front Panel
230V
1,25 AM
1,6 A T
V4
V9
+
+
V6
V11
V4
V6
V8
+
V7
(ECS)
V9
V10
+
+
V11
+
V5
Power Tube Fuses
100V und 120V
2,5 AM
3,15 A T
Internal Fuse
Power
Transformer
E C S (Emergency Circuit System)
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.
Handling and Care
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
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!
·
We reserve the right to make unannounced technical upgrades!
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