Laboga Mr.Hector User Manual page 14

Do not change the type of the tubes, no matter what opinions you have read on the internet.
Changing the tube type, especially the power tubes (e.g. 5881 for EL34) may cause damage to the
amplifier and results in warranty loss.
It is recommended to use V1 and V2 tubes with low noise specs and/or "low microphonics".
Because of the amplifier's high sensitivity, humming may occur when all the knobs are set to
maximum and the amplifier is on the distorted channel.
If the amplifier is only used in 50W mode, you can take out middle tubes V6, V7 and keep
them as a spare set for future use – the amplifier will use less energy and taken out tubes will not
be exposed to vibration while playing.
If the amplifier is always used in Diode mode, you can also take out the rectifier tubes
(5C3S).
HOW TO USE THE AMPLIFIER IN ORDER TO PROLONG TUBES' LIFE-SPAN
1. The amplifier is fitted with a rubber tube socket suspension, which makes the amplifier
more resistant to vibrations and shock. However, do not expose the amplifier to excessive
vibration or shock.
2. The amplifier should always be switched on the following way: First, turn the Power on
and wait for 1 minute. Then, you can switch from Standby to Tube or Diode. Switching
the amplifier off works the other way around: First flip the switch to Standby position,
then wait 1 minute before turning off the power.
3. Always use a matched quartet of power tubes, from Laboga or renowned producers.
4. Wait for the tubes to cool down before moving the amplifier.
5. When you don't use the amplifier, it is advisable to switch Standby to the "0" position.
6. An excessive amount of dust on the tubes may decrease heat distribution of the tubes,
which could shorten the tubes' life-span. Use original Laboga cover or hard case to
prevent damages and dust.
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