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IMPEDANCE SELECTOR —
Matches output transformer to speaker. See Notes section.
LINE OUT —
Attenuated signal from the output of the amp. All the tone of the amp, including the tube
output coloration is available at this jack. Potential applications: Slaving to other combo or power ampli-
fiers and recording.
FOOTSWITCH —
Stereo-type jack which switches both Channel and Reverb. Tip of the jack is Reverb;
ring is Channel. Note: Electronic and MIDI switcher—Channel switch is VC positive to ground. Reverb is
simple shorting.
EFFECTS SEND —
Proper send level for most effects devices. Connects to the "in" or "guitar" jack of
your effects. Can also be used as a D.I. (Direct Input) to a mixing console or recorder.
EFFECTS RECEIVE —
Unity buffered input from effects devices. Connects to the "out" or "amp" jack of
your effects. Can also be used as a direct Power Amp section input.
NOTE: A common problem many encounter while using effects devices is "ground loops." A ground loop
is often caused when an effects device, mixing board or tape recorder equipped with a 3-prong AC cord
are connected together with audio cables. The electrical difference between the AC ground (at the AC
plug) and the signal ground (audio cords) is amplified. This may result in increased hum levels and in
some cases high-pitched squeals or oscillation at high gain settings of the amp. The solution is often to
use the same outlet strip for all equipment rather than plugging into various separate outlets. In extreme
cases it may be necessary to isolate the AC grounds. If this is attempted, consult a qualified technician
to insure safety. Tube Works cannot recommend the disabling of any 3rd prong grounding plugs.
OPERATION NOTES
•
Never operate this or any other tube amplifier without a speaker connected to it! An open or "no
load" condition on output transformers can lead to internal damage.
•
Never use shielded speaker cables. Use only non-shielded, IS Gauge or larger speaker cables.
•
Use speakers capable of at least 80 Watts RMS (although this amp is rated at 60 Watts, typical
overdrive conditions require higher wattage speakers). Manufacturer is not responsible for any
speaker failure while using this equipment.
•
For maximum output volume, use proper impedance selection. Mismatched speaker loads will gen-
erally not damage either the amp or your speakers, but will affect maximum output power and
acoustic volume. Use this as a guide for proper switch settings:
Single Speaker: ...... Set switch to match
2 x 16 Ohm: ........… Set to 8 Ohm
2 x 8 Ohm: ............. Set to 4 Ohm
•
Provide adequate ventilation. Take care to allow as much air flow as possible by not blocking the
back of the amp.
