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2 Final Inspection - Your Guarantee of Quality

 

 

To  assure  you  of  optimum  performance  and  reliability,  this  amplifier  has  passed  our  rigorous 
final inspection and listening test by the Icon Audio team in Leicester. During which the final set 
up and adjustments were made. 
 

 

Date   

 

 

 

…./…./…. 

 

Model  

 

 

 

………. 

 

Amp Serial Number  

 

………. 

 

Customer 

 

 

 

…………………………… 

 

 

Check amplifier finish 

 

………. 

 

Check valve cover   

 

………. 

 

Internal wiring check  

 

………. 

 

Check Triode mode  

 

………. 

 

Run min 6 hour test  

 

………. 

 

Check inputs & tape monitor 

………. 

 

Output Valve Bias level 

 

……mv 

 

Sound Quality 

 

 

………. 

 

Channel Balance 

 

 

………. 

 

Valve Microphony   

 

………. 

 

Valve Seating 

 

 

………. 

 

Hum level left/right   

 

...../…..mv 

 

RF Test  

 

 

 

………. 

 

LED brightness 

 

 

………. 

 

Serial No sticker and recorded 

………. 

 

Mains voltage  

 

110 / 230-240V 

 

IEC Mains Fuse 

 

 

1.6

A……. 

 

UK Plug fuse  

 

 

3A..

…A 

 

Remote Control Function   

………. 

 

Sales invoice  

 

 

………. 

 

Bottom label   

 

 

………. 

 

Credit card receipt   

 

.……… 

 

Customer survey form 

 

.……… 

 

Bias meter 

 

 

 

………. 

 

Transformer Protection 

 

………. 

 

Upgrades:

  

 

HT delay fitted? 

 

 

…Y / N 

 

Output valves 

 

……....………. 

 

1

st

 Stage valve 

 

………………. 

 

Phase splitter valve  

………………. 

 

Mains lead   

 

 

………. 

 

Interconnects 

 

 

………. 

 

 
 
Signed off by  

 

………………………. 

 

Notes: 
 
 
 
 
 

Summary of Contents for Stereo 40 MK IIIm

Page 1: ...ttune themselves to the new sound Your source loudspeakers and room acoustics will also affect the sound before it finally reaches your ear Some people find a small adjustment in re positioning their speakers can help too The weakest link will always affect the final results when making judgements Not all recordings are equal Therefore an amplifier which faithfully reproduces the input signal will...

Page 2: ...l wiring check Check Triode mode Run min 6 hour test Check inputs tape monitor Output Valve Bias level mv Sound Quality Channel Balance Valve Microphony Valve Seating Hum level left right mv RF Test LED brightness Serial No sticker and recorded Mains voltage 110 230 240V IEC Mains Fuse 1 6A UK Plug fuse 3A A Remote Control Function Sales invoice Bottom label Credit card receipt Customer survey for...

Page 3: ...there are any unpleasant sounds coming from the speakers switch off and refer to the Trouble Shooting section or contact Icon Audio The GZ34 5AR4 valve rectifier acts as a HT delay on switch on If you do not intend to use the amplifier for a few hours you can switch into standby when it will use minimal power and be ready for use instantly In standby you may hear low distorted sound from the speak...

Page 4: ...ections will ensure a good connection whilst minimising the risk of shorts In our experience valve amplifiers are very tolerant of loudspeaker cables therefore the benefits of very exotic cables may be wasted But this is personal taste Icon Audio or your dealer will advise you As all cables have losses keeping the speaker cables short is best It may be better and be cheaper to re arrange your room...

Page 5: ...bles the valves to be fully warmed and ready to use the instant you put the standby switch down In the standby position the amplifier is only using about 50 of normal power It also enables a healthy cloud of electrons to build up around the hot cathode Also it allows the silver getter inside the valve to mop up any gas that has built up inside and therefore keep the vacuum hard for best performanc...

Page 6: ...event 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 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 ...

Page 7: ...rmance and power may be reduced Replacements may be obtained from Icon Audio The 274B is not strong enough for the ST40 arcing and premature failure is likely Explanation RMS watts Do not literally exist But this figure is based upon the RMS voltage output V R Push Pull is a very elegant way of virtually cancelling out non linear distortion noise and hum Whilst dramatically increasing the power an...

Page 8: ...d within three days of receipt This amplifier is designed for normal domestic hi fi use It is not guaranteed for commercial Public Address use or use in other situations The guarantee becomes void if the unit has been modified in any way not approved by Icon Audio 8 Packing Instructions It is essential that the original box and packing be kept in good condition as this provides vital protection du...

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