Specifications

Manual Van de Leur Audio 002

Appendix Manual 002

Tube replacement

Vacuum tubes will wear over time. This is normal and doesn’t signal any malfunctions.

Symptoms of wear can be audible sounds, like ‘whistling’ and high volume audible noise.

To replace the tubes, fully switch off the amplifier and remove the power cable. Pause for ten

minutes, in order for the amplifier to fully discharge and thus prevent unwanted electrical

discharge.

Remove the cover of the amplifier by removing the 6 visible screws. Use a matching 2,5mm

Allan key.

Ensure that the tubes have cooled before touching them. Otherwise, they may cause burn

injuries. The amplifier has been fitted with 6 vacuum tubes. Two E88CC in the front, for the

line stage. Four ECC81 in the back for the phono stage. Only replace the tubes with ones of

the same type.

Do not touch the tubes with bear hands; always use a piece of cloth to prevent direct contact.

Pull the tube out of its socket by pulling straight up. Do not bend or twist the tube. It may

require some effort as tubes fit tightly into their sockets. Replace the tube by placing it in the

same socket. Check for the right position of the pins underneath the tube. Do not use any

force as it may cause damage.

Put the cover back on the amplifier when you are done with replacing the tubes and connect

the amplifier back to its power source.

Phono stage MC adaption (dealer only)

The MC (moving coil) stage can be adapted to the used cartridge. This can cause a major

improvement in sound quality. The adaption requires soldering, solely to be done by

professionals. Note: MM (moving magnet) does not require adaption.

Load impedance

Check the specifications of the used MC cartridge on load impedance. The phonostage can

be adjusted up to a load of 344 Ohm, after which no adaption is required.

The load impedance of the MC cartridge can be adapted on the phono stage by adding two

resistors on the input circuit board, which is mounted on the rear panel. The resistors must

be soldered on the soldering islands located next to the MC10 step up transformers. Note:

there are no resistors mounted after delivery (unless specified). Use metal film resistors of

0.25 watt or precision wire wound resistors for ultimate result. Solder the right value resistor

according to the table or formula indicated underneath.