R.V.R. Elettronica VJ3000, Installation, Technical And Maintenance Manual

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R.V.R. ELETTRONICA S.r.l. (BO) Pag. 60
VJ3000 - Technical and Maintenance Manual
SECTION 3
INSTALLATION
3.1 INTRODUCTION
This section contains the information necessary for the installation
and preliminary checks of the VJ3000 Triode amplifier.
3.2 UNPACKING
Remove the unit from its packing and, before anything else, ensure
that the unit has not suffered any damage during transit and that all
front panel controls are operational.
3.3 FITTING THE TUBE
To fit the tube, carry out the following procedure:
1) Connent the line power cables to the connector block situated low
down at the rear of the unit The supply voltage should be 380V (or
as requested), threephase plus neutral. Connect the unit to a good
earth. Connect a dummy load suitable power rating, or the antenna
itself, to the amplifier output.
2) Open the rear panel, undoing the fixing screws (Fig.13)
3) Remove the top panel of the rack together with the top of the aluminium
flue (with protective metal net)
4) Switch on the supply ensuring that the ST.BY/H.V. switch is in the
ST.BY. position.
5) Now enable the tuning bottons with the key switch and use the PLATE
key to raise the fingered panel to its upper limit. Now ensure that
power to the unit is disabled.
6) Now insert the tube wwith the silver-plated anode tube into the
fingered hole of the sliding panel.
The tube has two discs that should initially be held towards the
person fitting the tube. Once inserted into the fingers, the tube
should be rotated until the discs are parallel to the part of the
cavity that shows other two discs fixed on the cavity wall itself.
Now raise the tube to position A as shown in Fig.14 and keep it in
this position. Insert the valve tube, rotating it until the grid
ring mates perfectly with the ring of the socket. To ensure the
correct insertion of the valve tube, check that the grid
contact, that nearest the anode is completely inserted in the
fingers mounted on the socket panel (see Fig.14).