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Trouble shooting
Amplifier Dead
If the LEDs or valves do not light up, check the 1amp
mains fuse at the back of the amplifier. To gain
access, remove the mains lead. The fuse is in a
small plastic drawer, which forms part of the socket
assembly. To open insert a flat bade screwdriver or
similar and prise open. The fuse in use is the
innermost the outer is a spare. Should the
replacement fuse also blow there is a fault.
Replacements should be 1Amp 'anti-surge'.
The fuse in the mains plug should be a 3 amp fuse,
although unlikely, this should be checked if the
amplifier fuse is OK.
No sound
Have you selected the right input? Are the
connections OK? Is everything switched on? Are the
speakers connected? Is MC selected on the MM only
version?
Valve Replacement
Valve life will depend upon such things as hours of
use and number of on/off cycles. A valve may be
considered to have come to the end of its life when
the sound quality has changed or it has become
noisy and or microphonic. Ideally you should replace
all three at the same time. As a rough guide we
would expect about 3000 to 5000 hours per set.
If the unit is working OK it is best left alone. The most
common faults are low level hiss and spitting noises,
and becoming excessively microphonic.
As the valves are crucial to maintaining the
performance and quality, choose them with care.
Only remove the cover after disconnecting BOTH the
mains supply AND the power supply. This may be
done by removing the screws from either side and
prising apart the cover to enable removal.
Warning: It is worth noting that this application is
very demanding from the ECC83 valves. Therefore
valves which are 100% OK in another application
may be noisy/microphonic or hum in the PS1. In the
process of testing and commissioning we reject
about 15% of valves for this reason. Used valves are
unlikely to work well. We have also found many so
called "premium" valves to have no advantage. At the
time
of
writing
the
consistently good performers. But feel free to
experiment!
Icon Audio are happy to replace valves and check
to performance of your amplifier, there are often
upgrades available such as the excellent JENSEN
paper in oil capacitors which have a rich
expansive warm sound.
A replacement set of valves from Icon Audio will
be tested in a PS1 before despatch to ensure
ideal sonic performance.
It is essential that only the correct valves are
used as similar looking valves have a different
pin connection and insertion could result in
damage to the amplifier and risk of electric
shock. If in any doubt consult your dealer or Icon.
Service: Should you suspect a problem, you should
return the unit to your dealer or Icon Audio for a
periodic service or return the valves for testing free of
charge.
JJ
ECC83S
have
been
Specifications and Features
Built in volume control
Stereo/mono switch for better S/N and distortion
from mono and worn stereo records
• Choke regulated power supply
• Separate Power supply
• All hand wired point to point
• No printed circuit board to 'colour' sound
• Japanese Blue ALPS volume pot.
• All Triode valves
• 3x ECC83
• Sensitivity: 5mv for 1.6v (0.5mv MC)
• Gain = 320 MM (3200)
• Load: imp: 47k MM, 100 ohms MC
• Custom wound MC transformers (option)
• Signal to noise level -75db (MM unweighted)
• RIAA Freq response 20hz-20khz +0 - 1db
• NO feedback used
• High quality close tolerance resistors
• Blue LED mains indicator
• Polypropylene audio capacitors
• Silver TEFLON audio cable
• DC supply for valve heaters
• Stainless steel chassis
• 6mm solid alloy front & rear plates
• Gold plated Input terminals
• 230/240volts 30watts 1.0A anti-surge fuse
• C E certified
• Pre-amp 88mmW, 310mmD, 134mmH , 3.9kg
• PSU 165mmD, 82mmW 80mmH 2.8kg
(Figures in brackets allow for rear connections)
(Specifications subject to change, errors & omissions excepted 23/08/11)
Designed and developed by David Shaw and Barrie
Roberts in Leicester, each pre-amp is carefully
checked & tweaked plus any custom modifications
added as required before undergoing rigorous tests
in all its important static & dynamic parameters.
Finally each pre-amp is run to allow the valves to
"bed in" for 24hrs to ensure you get the best
performance.
icon Audio
351 Aylestone Road
Leicester LE2 8TA
www.iconaudio.co.uk
Email: iconaudio@ntlworld.com
Phone +44(0) 116 244 0593
Cell +44 (0) 778 715 8791
Fax 0116 244 0593
Direct 23/08/2011
4
(UK) LTD
UK
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