Date: 25/07/03
R.V.R. Elettronica S.r.l. (BO)
VJ5000-TE - R.F. Tube Amplifier
47
Before to proceed, check the test resistors values in according to the amplifier type that is
used (in this case the type is VJ5000-TE that uses 4CX3500 tube, see as reference TABLE
D). Since, the protections intervention on the equipment is set at 3.9 V, is necessary that at
maximum voltage or current value of the tube corresponds to 3.9 V, to allow the protections
intervention.
Example:
A value for VJ5000-TE, tree-phases version, with 4CX5000 tube. IA max set to 1.6 A
corresponds to 3.9 V on the TP6 test point output. In this way if the current exceeds 1.6 A
value the protections intervene.In the manual there is a table with all input and output
voltage of the card.
IA = 1.6 A
Ig1 = 30 mA
VF = 7.5 VAC
Ig 2= 100 mA
ROS o RFL = 500 W
If = 78 A
4.3) MEASURES CARD ADJUSTING OPERATIONS
Adjusting procedure of the card at first switch on of the equipment in case of card
replacement.
The first operation that must be executed is that to calibrate the card reference voltage (3.9
V), using P15 trimmer.
To measure it using a multimeter connect the negative to ground and the positive to TP9 test
point.
Summary of Contents for VJ5000-TE
Page 22: ...Date 25 07 03 R V R Elettronica S r l BO VJ5000 TE R F Tube Amplifier 22...
Page 27: ...Date 25 07 03 R V R Elettronica S r l BO VJ5000 TE R F Tube Amplifier 27 5 Tuning motor...
Page 43: ...Date 25 07 03 R V R Elettronica S r l BO VJ5000 TE R F Tube Amplifier 43 N_1 DC ammeter...
Page 54: ...Date 25 07 03 R V R Elettronica S r l BO VJ5000 TE R F Tube Amplifier 54 FIG 28 REPORT MEASURE...
Page 65: ...Date 25 07 03 R V R Elettronica S r l BO VJ5000 TE R F Tube Amplifier 65...