RVR Solar VJ1000, User Manual

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VJ1000
6 / 40 USER MANUAL Rev. 3.0 - 26/02/01
4. General Description
4.1 Mechanical Description
The VJ1000 is housed in a 19" rack-mountable frame, 14U high, of which 4U are free
and may be used for an exciter, a receiver or other equipment.
All controls and switches are situated on the front panel together with two analog meters.
There are no connectors on the rear panel.
Both the cooling air inlet complete with fan and filter, and the power cable entry hole may be
found on this panel.
A flue may be found on the top of the unit for the expulsion of hot air used for coooling the
unit, together with the RF output connector (to be connected to the antenna).
4.2 Electrical Description
The VJ1000 is a tube amplifier with an earthed grid allowing a wide-band input (no
calibration across the band) from 87.5 to 108MHz.
This amplifier is able to generate an output power of over 1KW from an input power of
approx. 20/25W.
The amplifier features motorized anode and load matching across the entire operational
band.
The VJ1000 is available in single phase version.
4.3 Controls and Indicators
Two analog meters are present on the front panel; one measures direct power output
and reflected power output (1 Fig.1), the other measures plate and grid currents (3 Fig.1).
The output power meter has only one scale 1KW f.s.,both for the measurement of the direct
power output and for reflected power output.
The meter for the measurements of the grid and plate currents has two scales too; one for
1A f.s.for the measurement of the grid current and for 100mA for the grid current.
For each of these meters there are the relative reading selector
(2 and 4 Fig.1).
In central position there are some switches and led indicators that concern to the plate and
load tuning: the two led indicators signal respectively the stop for the plate tuning at 87.5
MHz (6 Fig.1) and at 108 MHz (8 Fig.1), while the three selectorsare used rispectively for to
enable the engines of tuning (5 Fig.1), for the plate tuning (7 Fig.1) and for the load tuning (9
Fig.1).
Then there are three led indicators that signal alarms: for an excess of R.O.S. (10 Fig.1), for
insufficient fan pressure (11 Fig.1) and for an excess of grid current (12 Fig.1).
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