R.V.R. Elettronica 4CX7500, Technical Manual

Page: 43 / 82

Date: 25/07/03 R.V.R. Elettronica S.r.l. (BO) VJ10000-TE - R.F. Tube Amplifier
43
CHAPTER 4
TUBE MEASURES CARD CALIBRATION
4.1 NOTICE
Pay attention, this calibration is been executed initially on the final power amplifier during
the checking test, only in case of card replacement, after that is been verified that is the
cause of the equipment anomaly, is necessary to proceed to the calibration of the card as
described later on. Before to proceed to the calibration, check on the card if J3 is in short
circuit, and if it’s verified, the card is been configured for a tetrode amplifier.
If the short-circuit is on J4 the card is been set for a triode amplifier.
4.2 INTRODUCTION
To calibrate the measures card for tube amplifiers, placed near to mains voltage switch in
the rear part of the high tension panel 9H (Fig.3), it’s necessary to have:
-N_1 power supply 0-20V, 0-10 adjustable both in tension and in current.
-N_1 multimeter.
-N_1 DC ammeter.