AVO VCM 163 buizentester uitbreiden (Techniek Overig)

door Oldtimer , Oegstgeest, 22.09.2016, 04:20 (2983 dagen geleden) @ electronenbuizen

Je kunt niet zomaar de bedrading veranderen/aanpassen, daar wordt in het Service Manual van de AVO VCM 163 op bladzijde 4 nadrukkelijk voor gewaarschuwd!

SERVICING THE VALVEHOLDER PANEL

The valveholder panel is connected electrically to the control panel by means of a 12-way tagboard. The wiring of the valveholders on the panel is in the form of thirteen loops, all pins numbered '1' comprising a loop and linking in roller '1' of the ROLLER SELECTOR switch, and pins '2' forming a second loop and linking to roller '2', and so on.

This form of connection is used for all other pins, all thirteen circuits being approximately equal in length and following a simular path around the panel. These loops are loaded with ferroxcube beads which sufficiently damp the loop to prevent the valve breaking into parasitic oscillation. Ferrox beads are also used on leads feeding the ROLLER SELECTOR switch as a further protection against oscillation.

Willem