tubesteader SUNKEEPER User manual

MANUAL v1.1
The Sunkeeper is a dual-channel tube preamp inspired by the distinctive
sound of the Orange amps.
This is an extremely versatile sound machine that easily swaps from
blues and classic rock tones such as Zeppelin and Sabbath, all the way to
the modern progressive metal styles.
The clean channel has a sparkling and chimey tone, voiced for rock
ballads or intros with plenty of clean headroom on offer. The dirty
channel can do anything from light grit to massive, saturated fuzz with
almost infinite sustain.
The Sunkeeper has a pure tube signal path. A pair of full-sized 12AX7
operate at the proper high voltage (around 260VDC) to provide the
feel and response of a true tube amplifier.
INTRODUCTION
DUAL CHANNEL TUBE PREAMPDUAL CHANNEL TUBE PREAMP
Congratulations on your purchase and thank you for supporting us!
CAUTION! RISK OF ELECTRIC SHOCK.
DO NOT OPEN THE ENCLOSURE.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interfer-
ence that may cause undesired operation.
Unauthorized changes or modification to this system can void the users
authority to operate this equipment.
This equipment has been tested and found to comply with the limits for
a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or
more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
CAN ICES-003 (B) / NMB-003 (B)
This device complies with Industry Canada license-exempt RSS
All Tubesteader pedals are warrantied to be free from defects in parts
and craftsmanship for 5 years from the original date of purchase.
The external hardware, such as pots, switches and jacks are warrantied
to be free from defects for a period of 1 year from the date of purchase.
The tubes are covered for a period of 30 days from receipt of the pedal.
EXCLUSIONS:
- Damage caused by accident, abuse, modification, improper use.
- Cosmetic wear and tear of the enclosure and external hardware.
- Shipping costs.
Tubesteader reserves the right to make changes and
improvements in designs & dimensions without notice.
The Tubesteader will repair or replace, at our discretion, the product
under the warranty at no cost to the original owner. For any warranty or
repair inquiries, please contact support@tubesteader.com
Returns are accepted within 7 days from the date of receiving your
order. To qualify for return the product has to be in “new” condition,
in the original packaging and perfect working order.
WARRANTYCOMPLIANCE
SUNKEEPER

The CLN channel features a non-master volume circuit and
provides volume, treble, and bass controls.
The OD channel has volume, gain, and bass, middle, and treble
EQ controls. Both channels are fully independent of each other,
allowing you to dial in a vast range of tones with just about any guitar.
The side-mounted OUT LVL switch offers two output options: a
full output for connection to a power amp and an attenuated
output with slight high-cut for connection to the front of an amp.
SPECIFICATIONS
CIRCUIT
Input Impedance: 1MOhm
Vacuum Tubes: ECC83/12AX7 x 2
Power: 12VDC @ 500mA, power adapter supplied
Power connector: barrel 2.1mm, center negative
Enclosure: Die-cast aluminum
Size: 4.7" x 5.7" (120mm x 145mm)
Height: 2.75” (70mm) including tube protectors
Weight: 1.6 lbs (800 gr.)
CONNECTIVITY
To prevent malfunction and equipment failure,
always turn down the volume before making any connections.
The Sunkeeper comes with a pair of 12AX7 vacuum tubes installed.
To explore additional tonal possibilities, the stock tubes can be
swapped with equivalent preamp tubes from other brands.
When powering up from a cold state, please allow the Sunkeeper to
warm-up a few minutes before playing. The tubes run warm to the
touch under normal operation.
TUBES
INTO THE FRONT OF A GUITAR AMP
Flip the OUT LVL switch down to engage the attenuation mode. Adjust the
amp’s tone control(s) to flat or centered. Let the Sunkeeper handle EQ and
Gain preferences. The Sunkeeper may be chained with other pedals. Where
there are no rules, we suggest running overdrive or distortion pedals in front
of the Sunkeeper with ambient and modulation devices behind it.
DIRECTLY INTO A POWER AMP or powered speaker.
Flip the OUT LVL switch up to enable full output mode.
INTO FX-RETURN JACK
Since the FX-loop circuits differ between amp models, the choice of output
level will depend on your amp.
INTO A MIXING CONSOLE OR RECORDING INTERFACE
Flip the OUT LVL switch down to engage the attenuation mode.
We suggest to use an IR/Cabinet simulator for this type of connection.
1
2
3
4
CONNECT THE SUNKEEPER:
CONTROLS
Clean channel 2-band EQ
CLN/OD footswitch with bi-colored status light
True bypass footswitch with a status light
1
2
3
5
BASS, TREBLE
6
7
8
CHANNEL
BYPASS
4
OD channel volume level
VOL
OD channel gain level
GAIN
OD channel 3-band EQ
BASS, MID, TREBLE
Clean channel volume level
CLN
Output level switch
OUT LVL
24
1
5
6
7
3
CLN
MID
TREBLE
TREBLE
BASS
CHANNEL BYPASS
V1
12AX7
V2
12AX7
500mA
12VDC
-+
VOL GAIN
BASS
HAND BUILT IN CANADA
SUNKEEPER
IN
TRUE BYPASS
CLN
CHANNEL
OD GAIN
V1a
CLN_EQ
OD_EQ
VOL
V1b V2
OUT
OUT LVL
8
The drawing below represents a block diagram
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