Palstar PM2000A User manual

Palstar products are designed by
Hams for Hams carrying on the
Palstar tradition for high-quality
products designed and
manufactured in Ohio, USA.
PM2000A 2000W Wattmeter
Technical Manual
300 W and 3000 W ranges
 2000 W max power
Frequency range: 1.8 to 60 MHz
Weight: 1.3 Lbs
4.5” H x 4.5” W x 3.5” D
9676 N. Looney Rd,
Piqua, OH 45356 USA
[phone]
[phone]
[phone] (Fax)
www.palstar.com
PALSTAR
PM2000A 2000W Wattmeter
Technical Manual
Designed and Manufactured in the USA
Copyright 2018 Palstar, Inc.
PALSTAR

POWER RANGE: 300 and 3000 Watts ranges
MAX POWER: 2000 Watts
FREQUENCY RANGE: 1.8 to 60 MHz
DIMENSIONS: 4.5” W x 3.5“ D x 4.5” H
WEIGHT: 1.3 Lbs
CHASSIS: Alodine-plated aluminium chassis
PM2000A SPECIFICATIONS
Page 3
Page 2
PM2000A OPERATION
PALSTAR
INSTALLATION
Install your PM2000A base wattmeter before any antenna tuner. This
will give you an accurate means to measure the SWR of the antenna
system. If the antenna is cut for the right frequency and a tuner is
not required, connect the PM2000A as above.
An AC adapter is used to light the meter & power the peak reading
circuitry, 12 Volts required at 40-50 ma. The power Jack requires a
2.1 mm plug center + (positive).
CALIBRATION (not required as shipped)
Using a calibrated source, adjust the meter calibration as follows:
terminate the wattmeter in a known 50Ω dummy load through a
calibrated wattmeter of known accuracy.
Pick a level on the 300 watt scale of the PM2000A of 100 watts. If the
level is either low or high compared to the calibrated wattmeter
adjust the pot on the 300 watt scale as noted in the drawing below
to match the readings. As single tone = peak, adjust for peak reading.
Similarily on the high scale pick 500 watts to read on the calibrated
wattmeter and adjust the forward 300 watt pot to read the same on
your PM2000A base wattmeter. Peak adjust as above for high power
settings.
PEAK READING
The PM2000A is capable of reading peak values in the SSB mode.
Depressing the front panel button PEAK to read peak will activate
the active circuitry and the meter will exhibit fast attack and a delay
of about 1-1.5 secs. The peak value will be about 95-100% of peak
SSB power. Depending on the voice characteristics this may be
higher.
Single tone as it reads on the meter will read the same in peak mode
as single tone power (average) equals single tone in peak mode. This
is the way you check to see if the CW single tone power in the AVG
position will be the same in the peak mode. There are 2 level controls
that you can add if these readings are not the same in either the 300
watt or 3000 watt range. The PEAK/HOLD button if depressed will
read PEAK in addition to holding at the peak value
for 2 seconds approximately. NOTE: the PEAK/AVG
must be depressed in order for HOLD to function.