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THE RK100
ALL VALVE 100WATT HEAD
Spec: 100 watt, Single channel, all valve head with foot-switchable ‘Hot’ control.
Valves: 4 x EL34. 4 x 12AX7WA.
Cabinet: 19mm ply, lock-jointed.
Hardware: All corners, screws, cup washers, handle fixings etc. are
nickel-plated. CNC punched powder coated grills.
16 Gauge (1.5mm) powder coated chassis with 14 gauge base / screening plate
secured to chassis with 4 machine screws. 18 gauge brushed stainless steel front
and back panels. Leather handle.
Transformers: Custom designed in-house.
Construction
Methods: Hand wired and hand assembled throughout.
No PCBs of any sort.
Controls: Front panel from left to right: Input socket (top), ‘Hot’ footswitch socket
(bottom), Gain, Bass, Middle, Treble, Master, Presence, Standby switch, Mains
switch, green neon Mains indicator.
Rear panel from left to right: Mains inlet, Mains fuse, Speaker impedance
selector for 4, 8 and 16 ohm loads, Parallel Speaker Sockets, Output valve
failure fuses and indicator LEDs, Series effects loop send and return sockets.
Accessories
Supplied: Footswitch: 14 gauge mild steel, powder coated, with metal footswitch and LED
indicator.
6 Metre Footswitch Lead with Neutrik 1/4” mono Jack Plugs.
3 metre mains lead.
Speaker lead, 600mm, top quality 8mm cable with nickel-plated Neutrik jacks.
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RK100 CONTROL OPERATION
Gain Adjusts overall pre amp gain.
Bass Adjusts low frequency response of the pre amp.
Middle Adjusts frequencies around 500 Hz in the mid-range.
Treble Adjusts high frequency response of pre amp.
Master Sets the output level of the amplifier.
Presence Boosts high frequency response of the power amp only.
Effects loop This is a series effects loop, the send level is –6dBV. Suitable for foot
pedals and rack processors.
Speaker This can be set to accommodate 4, 8 and 16 ohm speaker loads
Impedance
Selector
‘Hot’ Switch Gives increased gain in the preamp by allowing more signal from te
first gain stage to overdrive the rest of the pre amp.
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Important Safety Instructions
WARNING – When using electrical products, basic precautions
should be followed, including the following:
1. Read all the instructions before using the product.
2. Do not use this product near water – for example, near a bathtub, wash
bowl, kitchen sink, in a wet basement, near a swimming pool or the
like.
3. This product may cause permanent hearing loss. Do not operate for
long periods of time at high volume level or at any level that is
uncomfortable. If you experience any hearing loss or ringing in the
ears, you should consul an audiologist.
4. The product should be located so that its location or position does not
interfere with its proper ventilation.
5. The product should be located away from heat sources such as
radiators, heat registers, or other products that product heat.
6. The power supply cord of the product should be unplugged from the
outlet when left unused for a long period of time.
7. Care should be taken so that objects do not fall and liquids are not
spilled into the enclosure through openings.
8. The product should be serviced by qualified personnel when:
a. The power supply cord or the plug has been damaged: or
b. Objects have fallen, or liquid has been spilled into the product:
or
c. The product has been exposed to rain or moisture: or
d. The product does not appear to operate normally or exhibits a
marked change in performance: or
e. The product has been dropped, or the enclosure damaged.
9. Do not attempt to service the product. All servicing should be
Referred to qualified personnel.
10.For continued protection against risk of fire, replace fuses only
With those of the same type and rating as indicated on the back of the
product.
11. Always connect the speaker before switching on.
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GROUNDING INSTRUCTIONS
This product must be grounded (earthed). If it should malfunction or
breakdown, grounding provides a path of least resistance for electrical
current to reduce the risk of electric shock. This product is equipped
with a supply cord having an equipment grounding conductor and a
grounding plug. The plug must be plugged into an appropriate outlet
that is properly installed and grounded in accordance with the local
codes and ordinances.
DANGER
Improper connection of the equipment-grounding conductor can result
in a risk of electric shock. Check with a qualified electrician or
serviceman if you are in doubt as to whether the product is properly
grounded. Do not modify the plug provided with the product – if it will
not fit the outlet, have a proper outlet fitted.
The wires in this mains lead are coloured with the following code:
EARTH NEUTRAL LIVE
U.S.A. Green White Black
U.K. Green/Yellow Blue Brown
CE mark for European Harmonised Standards
The CE mark which is attached to these products means it conforms to
EMC Directive (89/69/EEC), CE mark Directive (93/68/EEC) and Low
Voltage Directive (72/23/EEC).
VALVES AND FUSES
All valves and fuses fitted to a Cornford amplifier are
consumable items and, therefore, are not covered under the
manufacturer’s guarantee.
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