TRACE ELLIOT Velocette 12R Mode D'emploi page 4

TRIODE mode produces around half as much power. Therefore has less headroom and
produces power amp distortion earlier. It also has less high frequency content, therefore
it is not as bright as pentode mode, and produces mainly even order harmonics.
The choice as to which mode to use will depend on several factors including playing
situation, instrument used and, most importantly, personal taste.
Power Switch (Off/Standby/On)
As the name implies, this switches the amplifier from OFF to STANDBY mode,where only
the valve heaters are on, to ON for actual use. This should be used correctly every time
the unit is used to prevent problems with valves and to increase their life.
Before mains is applied to the unit, check that is the correct voltage and make sure the
POWER switch is in the OFF position. Connect power lead to mains outlet then switch to
STANDBY and wait about a minute before switching to ON. This ensures that the valves
have time to warm up before large voltages are applied to the plates. During short breaks
the amplifier can be switched to standby and will therefore be ready to play when next
needed.
After switching off it is recommended, as with all valve amplifiers, that it does not receive
any sudden physical shocks while the valves are still hot, i.e through moving the unit. If
possible try to give the amplifier a few minutes to cool down before transporting it.
IEC Socket/Mains Fuse
The IEC socket is for connection to universally used IEC mains leads to connect to
appropriate domestic mains supply.
In the event of having to replace the mains fuse always use the same rating and type as
marked on the unit's rear panel. Using one of higher rating will invalidate the guarantee.
If after replacement the mains fuse should blow a second time, immediately refer the unit
to a TRACE ELLIOT approved service engineer for checking.
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