7
USEFUL HINTS AND TIPS
The following hints and tips are provided so that you can get the best performance out of your
valve amplifier. These are only
guidelines and should be adapted for your own preferences:-
Valve amplifiers take a short time to 'warm up' to optimum operating temperature. To get optimum performance out of your amp
allow the amplifier to 'warm up' for three mins. before you begin playing.
The position of an amplifier in a room has an effect upon the overall sound characteristics. If you wish to increase the bass
responce of your amplifier place the amplifier on the floor. If you wish to reduce the bass response of your amplifier place the
amplifier on a stand.
Do not place you amplifier hard up against a wall as this will reduce the air circulating around the back of the unit and may result in
overheating.
Laney
1:
2:
3:
4:
Connecting your guitar to either the 'HI' or 'LO' input has an effect on the sound, regardless of the guitar type/pickup
configuration. The 'HI' socket provides more gain. The 'LO' socket provides a lower gain. You should experiment with both inputs
to find the one which suits your guitar, style of playing and gives you the most tonally pleasing results.
VALVE REPLACEMENT AND TROUBLE SHOOTINGPS
VALVE REPLACEMENT AND TROUBLE SHOOTING
The valves in your new valve amplifier will eventually need replacing due to wear, this is normal with valve amps. In most instances
you should be able to effect valve replacement yourself without incurring the costs of a service engineer. Following are some of the
most likely symptoms of valve malfunction and a suggested method of correction.
Normally valve amps give optimum performance when fitted with matched sets of output valves as factory fitted to all
valve
amps. NB: Damage will not occur by not fitting matched sets although the amplifiers performance may be impaired.
Laney
VALVE IDENTIFICATION
SOLUTION 1
SYMPTOM 1
Check time delay POWER FUSE and replace if necessary:-
100-120 Volts 5 Amp time delay
220-240 Volts 2 Amp time delay
Amp connections have been performed correctly but power light fails to illuminate
SOLUTION 2
SYMPTOM 2
Power light illuminates, no sound out put
Check secondary HT fuse and if blown replace with
1 amp time delay
5:
When using the 'BRIGHT SWITCH' on the amplifier keep in mind that it has a greater audible effect the lower the amount of
distortion produced by the preamplifier. At some distortion levels the 'BRIGHT SWITCH' may appear to have no effect at all.
1
2
3
4
5
6
7
8
9
10
Pre Amplifier
input valves
6xECC83
Power Aamplifier
output valves
4x5881 matched quartet
1 First gain stage-Clean channel
2 2nd gain stage-Clean channel
3 First gain stage Drive channel
4 2nd gain stage Drive channel
5 3rd gain stage Drive channel
6 Power driver stage
7 & 8 2x5881 Output valves for VC50
7,8,9&10 4x5881 Output valves for VC100/VH100R.
VALVE FUNCTIONS