Specifications

Wheatfield AudioWheatfield Audio HA-1 Owners ManualHA-1 Owners Manual
8/30/00 Page 3
Safety
The HA-1 is a tube amplifier. As such, there are some safety precautions that you need
to observe.
!! CAUTION: HOT SURFACES. KEEP COMBUSTIBLES AWAY FROM TUBES.
DO NOT BLOCK AIR FLOW AROUND AMPLIFIER.
DANGER: TO PREVENT ELECTRIC SHOCK, DO NOT REMOVE COVER. NO
USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED PERSONNEL.
First, tubes get hot. Please ensure that there is adequate ventilation around your HA-1,
and never place anything directly on top of the unit. If you place the HA-1 on shelves or
in an equipment rack, make sure that there is plenty of space above it.
Also, make sure that you don’t locate the amplifier near anything that could create a fire
hazard. Don’t place it near curtains, for example, or bedding, or anything else that is
flammable. Make sure that there’s nothing but air within a foot of the top of the
amplifier.
Second, there are high voltages inside the chassis of the HA-1 – up to 200 Volts. Do not
open the chassis of the HA-1 unless you are qualified to do so. If you have any doubts,
don’t do it – refer service to somebody that is familiar with working on tube equipment.
And if you do open the chassis (to replace tubes, for example), make sure that it’s been
unplugged for at least a minute to minimize the risk of electric shock.
Like any electronic equipment, do not operate the HA-1 near water, or in any location
where it is likely to get wet. If by some accident water or other liquid is spilled onto the
amplifier, unplug it immediately. Take it to a competent service technician and have it
checked out, dried off, and cleaned before plugging it back in.
If for some reason the fuse on the HA-1 blows, replace it only with the same type of fuse
that was originally installed. The HA-1 uses a slow-blow, 0.63A, 250V, 5x20 MM fuse.