Page 6
experiment with moving equipment around to see
if this makes the hum better or worse.
One channel missing.
Usually ‘bad’ connection on either the input or the
speakers. Try swapping the connection over to
establish if the cause is:
(a) Input to the amp.
Sound will move to the
other channel.
(b) Amplifier or speakers.
Sound will not
move.
Strange noises coming from speakers
Turn volume to minimum on unused input, if
problem corrected either fault with source unit or
with connection. If noise persists, problem with
amplifier.
If a whole output valve glows red (other than the
heater), often accompanied by a hum through the
speakers, switch off immediately, and refer to Icon
Audio or a service engineer, as this could be valve
failure.
A valve that is lit up is not a guarantee that it is
working properly; conversely a valve that is not lit
up will not be working.
Valve Replacement
(see also section 7)
Valve life will depend upon such things as hours
of use and number of on/off cycles, the HT Delay
Circuit if fitted will extend the life of the valve by
not stressing the cathode when it is cold. It is not
good practice to remove the valves unnecessarily
as this can strain the pins and cause tiny air leaks.
Service:
Should you suspect a problem, you
could return the unit to your dealer or Icon Audio
for a periodic service or return the valves for
testing free of charge. You should carefully
remove the valves (the EL34s should be held by
the base when removing, to prevent damage)
numbering them with a marker from left to right as
you do so in order that that may be replaced in the
same position. They should be well packed in
cardboard & foam or similar, and returned to your
dealer or Icon Audio for testing. (Valves are very
rugged if packed properly).
Mains Supply
This amplifier is hard wired to work on 230/240v
ac. The transformer may easily be re-configured
for 110/120v ac. Contact for more information.
6 Specification & Features
(Typical conditions @ 240v 50Hz)
EL34 output valves or eqv (6CA7)
12AT7 (ECC81) double triodes for first stage
12AT7 (ECC81) double triodes phase-splitter
Hand wired point to point components
No printed circuit board
No tag board
Ceramic valve bases for low noise/leakage
HT delay circuit to protect cathodes (optional)
40w RMS per channel Ultralinear
19w RMS per chan Triode mode
Signal to noise level -90db
Freq response 20-20khz +or- 1db
Power bandwidth 10hz-30khz
0.2% THD at full output
4 and 8 ohms output taps
Japanese EI transformers
Choke regulated power supply
Supplied with attractive safety guard
Minimal feedback used
3 section transformer cover to reduce noise
High quality metal film & wire wound resistors
High quality polypropylene audio caps
Japanese ‘Blue’ ALPS volume pot.
Rubicon/Nichichron
power
caps.
Internal wiring using silver gilt cable
Valves carefully matched for best performance
Polished stainless steel chassis
Gold plated Input & speaker terminals
Inputs for CD, Tape, Tuner, Aux
Tape monitor
300 mv sensitivity for full output
230/240volts,
150watts
1.6 amp rear fuse (with spare)
320W, 250D, 180H, 15kg
IEC mains lead, (5amp fused)
CE
certified
Specification subject to change without notice.
