JUMA PA1000 User manual

JUMA PA1000 User Manual Version 1.50 update 2019-02-01 Page 1 of 19
JUMA PA1000
Linear Amplifier
User Manual

JUMA PA1000 User Manual Version 1.50 update 2019-02-01 Page 2 of 19
Congratulations!
Thank ou for choosing the JUMA PA1000 linear amplifier.
You will find it eas to use. Enjo using our new JUMA PA1000.
Please review this entire manual for important information.
Safety Warnings!
Dangerous voltages inside the PA1000.
Do not open the enclosure.
Check that the mains AC voltage to be used is the same as marked on the rear panel.
If ou have a switchable 115/230VAC option check that the voltage
on the bottom of the case is set correctl .
Use an AC mains suppl with a protective earth ground.
If a protective earth ground is not available 
connect our station ground to the rear panel ground terminal.
If ou ever need to change fuses, first switch OFF power with the rear panel rocker switch.
Then remove the power cable and wait at least 5 minutes before changing fuses.
ntroduction
The JUMA PA1000 is a state-of-the-art, ultra lightweight kilowatt amplifier covering 160 through 6 meters in an
attractive carr -on size. It uses the latest solid-state technolog and is built for portable, travel, DXpedition, as well as
home station use. The amplifier has high gain and operates with high efficienc . Maximum exciter drive to the
amplifier is 25W. It produces full-rated output of 1000W PEP with low input power, t picall around 10W.
The PA1000 is engineered to provide reliable use in normal amateur radio operation as rated using SSB and CW
modes. A rugged, industrial-grade LDMOS RF power MOSFET is used. These devices have inherent high SWR tolerance
but must be protected from overdrive and excessive input power. The amplifier has built-in fault protection for high
SWR, high current and excessive temperature. Fans are quiet and user-adjustable.
An innovative design allows wide ranging use to matched antennas without need for an external tuner. A low-pass RF
filter section provides clean output with minimal loss. The built-in power suppl is a proven, lightweight “RFI-silent”
resonance AC/DC converter and provides user-selectable voltage. The PA1000 can be used with nearl an transceiver
and provides automatic band switching as well as BCD output to control an external device such as a switchable or
automatic antenna.
In addition, firmware is readil updated and full remote operation can be configured. Available options are a
switchable 115/230 VAC power suppl and a hand PC/Mac interface - the JUMA COM HUB.
Copies of this User Manual ma be downloaded at www.jumaradio.com
Thank you for choosing the JUMA PA1000
and hope you have many enjoyable contacts ith this great amplifier!
JUMA PA1000 is designed in Finland b OH2NLT and OH7SV
JUMA® is a registered trademark of Juha Niinikoski and Matti Hohtola.
All Rights Reserved. Cop right 2019 jumaradio.com

JUMA PA1000 User Manual Version 1.50 update 2019-02-01 Page 3 of 19
Precautions and Warnings!
Normal input power is 10 watts!
NEVER allow exciter drive power to exceed 25 watts to the TRX input connector.
Design precautions ensure the LDMOS RF power MOSFET is not subject to excessive input and overdrive. The PA1000
uses built-in RF input attenuation to limit drive power to nominal levels of about 10W, while still achieving full-rated
output power. The amount of input attenuation sets the range of available gain levels (G1 to G8) and ma be user-
adjusted. The highest gain levels (above G4) should onl be used if it is certain there is no risk of transceiver overdrive.
Man transceivers exhibit initial, brief power spikes, up to 100W or more, even when a low power setting like 10W is
selected. This results from the inherent timing of ALC and compression circuits in the transceiver. To avoid amplifier
damage, keep the EXCITER MAX PWR set to 100W in the PA1000 - unless ou are using a low power transceiver or ou
are quite certain that our transceiver is not showing momentar power overshoot This setting will enable gain
settings (from G1 to G4) appropriate for our transceiver. In most cases, this will achieve full-rated power output with
nominal input power of ~10W. See the PAGE selection settings for more details. In all cases, do not allow exciter drive
power to exceed 25 watts.
A reasonably matched resonant antenna is highly recommended- instead of using an antenna tuner!
High power antenna tuners are t picall limited to matching loads with a SWR 3:1 or better. High power automatic
tuners also generall require at least 15 to 20 watts to achieve an acceptable match. Besides, an poorl matched
antenna has inevitable loss even when a tuner is used.
The JUMA PA1000 is designed with excellent output impedance matching and built-in fault protection for high SWR.
The amplifier will safel switch to standb with a high SWR. However it is critical to understand that an antenna tuner
rated for 1kW or more MAY NOT safel tolerate high power with an unknown SWR and severel mismatched load. In
certain cases, the current or voltage limits of tuner components can be exceeded. This ma produce arcing or other
tuner failure which can present damaging energ to the amplifier.
If ou choose to use a tuner do not exceed its power and SWR limits.
If ratings and limits are not specified ou should not use the tuner.
An antenna tuner, roller or rela switched inductors/capacitors, and especiall auto tuners, must be pre-adjusted
at the lowest practicable RF power level to avoid appl ing damaging RF voltage to the amplifier.
TUNE W TH EXC TER LOW POWER AND D SABLE AUTO TUNE FOR JUMA PA1000 USE!
Tuning an antenna tuner with the PA1000 in the OPER state ma damage the amplifier and will void the warrant .
T S RECOMMENDED NOT TO USE AN ANTENNA TUNER
but to adjust our antenna to a reasonable SWR.
Use an antenna that provides reasonable impedance matching
Reduced power output ma occur with a poorl matched antenna. SWR of 1.5:1 or better is recommended. If SWR
reaches 2:1 or worse ou ma need to lower the amplifier gain and/or reduce drive level. Do not use an antenna with
an unknown SWR.
AUTO BAND tracking is highly recommended
Use the cable connection for band data that is applicable for our transceiver. Manual band selection is NOT
recommended – accidental manual wrong band selection ma cause amplifier failure.
Avoid full-duty cycle key-down operation
The amplifier is designed for SSB and CW operation and not for 100% dut c cle ke -down operation such as AM, FM,
RTTY and digital modes. The amplifier will enter STBY mode for temperature protection during prolonged ke -down
periods. To improve operation and efficienc during extended SSB or CW use or in contesting, the PA voltage can be
adjusted as needed to the LOW setting. Output power of 700W or less will enhance cooling.

JUMA PA1000 User Manual Version 1.50 update 2019-02-01 Page 4 of 19
JUMA PA1000 overview
JUMA PA1000 is an ultra lightweight (just 5.5kg / 12 lb)
solid state 1kW linear amplifier for HF and 6 meter
bands. It is especiall convenient for DXpeditions and
portable or travel as well as home station use. The
PA1000 uses a modern LDMOS transistor in the RF
amplifier. RF output matching is based on an innovative
design which provides excellent efficienc . The power
suppl is a proven and clean lightweight resonance
design. The PA1000 is completel silent after cool down
and can standb indefinitel , consuming onl 6 watts
(convenient for remote use).
JUMA PA1000 accepts band data from popular
transceivers. It supports parallel BCD, serial band data
and analog band voltage.
JUMA PA1000 is full protected against excessive SWR,
over current and over temperature. It withstands
wrong band antennas, open or short circuit in the RF
output and accidental impedance transients. The SWR
protection is based on reverse RF power coming back
from the antenna. Thus if our antenna SWR is too high
ou can continue working b lowering the power.
Simple user interface
JUMA PA1000 is eas to use. There are onl necessar
push buttons in the front panel. LCD indicates the
essential information, LED bar shows the output power
and reverse power. OPER, AUTO band and protection
are indicated b their own LEDs. The rear panel has the
fused AC power connector, TRX connector, ANT
connector, PTT input and BAND DATA/COM inputs.
Firmware update is eas with connection to a PC.
Features
•Nominal output power 1000W PEP – SSB and CW
•All HF bands including WARC bands and 50 MHz
•Nominal 10W input power
•Adjustable gain for 5W to 25W exciter drive
•Input matching better than 1.3:1 on all bands
•LCD displa for band, gain, SWR, voltage, current and
temperature
•LED bar displa for forward and reverse RF power
•SWR, over current and over temperature protection
•Temperature-controlled proportional speed fan
•Auto band data (or manual band selection)
•Band data formats: BCD, RS232, C-IV and voltage
•Converts serial, voltage or manual band data input
to BCD band data output. Convenient feature for
antenna switching and other applications.
•Quiet and rapid T/R rela for break-in CW operation
•Remote support with a PC / Windows application.
See more here www.jumaradio.com/juma-pa1000
•Firmware updates with an PC
•230VAC or selectable 115/230VAC option
•Small size: 260 x 135 x 300 mm
(W x H x D) 10.2 x 5.3 x 11.8 in
•Ultra lightweight: 5.5kg / 12 Lb
•CE marked
•Two ear warrant and One ear MOSFET warrant .

JUMA PA1000 User Manual Version 1.50 update 2019-02-01 Page 5 of 19
JUMA PA1000 front panel
JUMA PA1000 rear panel
Protection
indicators
Reverse power
LED bar
Forward power
LED bar
Multi function
displa
Band selection
push buttons
Operate/Standb
push button
Displa page selection
and adjustments
TRCVR RF
connector
BCD
Band data
in/out
,
PTT input,
COM2 for Remote use
AC
Power
entr module
Ground
terminal
Antenna
connector
PTT input
COM1
:
RS232 and CI-V
Serial Band data
TX ON LED

JUMA PA1000 User Manual Version 1.50 update 2019-02-01 Page 6 of 19
Display page selection and adjustments
PAGE button selects displa page one after another.
ADJUST buttons change the setting on the selected
page.
Main Page
In the Main Page the ADJUST buttons are changing the
gain of the amplifier b means of the adjustable input
attenuator. The gain can be set from G1 to G8 with a
step of 1dB. Alwa s start with G1 which is the lowest
gain b monitoring the LED bar power indicator. The
gain setting is individual for each band. PA1000 will
remember the gain settings. Note. EXCITER MAX PWR
setting ma limit the max gain setting.
Note. The temperature reading is indicating the
MOSFET case temperature. The temperature rise of the
heatsink is about half of that temperature rise. Max
MOSFET case temperature is 105°C.
Other display pages
Push the PAGE button one after another for the other
displa pages and use the ADJUST buttons to change
the setting.
LCD brightness adjustment
LCD contrast adjustment
Band data selection. Options: BCD data, JUMA Serial,
Icom CI-V, Kenwood Serial, Elecraft Serial, Yaesu
Voltage, Icom Voltage.
COM1 baud rate adjustment (Serial Band Data)
COM2 baud rate adjustment (Serial Remote data)
Proportional fan control adjustment. The fan will run
with the maximum RPM at the selected MOSFET case
temperature. Normall ou can select 90°C. During
heav use ou can lower this setting for proactive
cooling.
This setting protects the MOSFET gates b limiting the
maximum gain setting (G1…G8) b means of the input
attenuator. Options are: 5W, 10W, 25W (max gain G8),
50W (max G7), 100W (max G4). Reduce this setting if
ou know that our transceiver is not momentaril
overshooting more power than selected.
The purpose of this PA voltage selection is to optimize
the efficienc . The options are High and Low. Select
Low PA voltage for for reduced power operation below
700W. Note. The voltage indication ma fluctuate
during standb which is normal.

JUMA PA1000 User Manual Version 1.50 update 2019-02-01 Page 7 of 19
LED Bar Power ndicator
The LED bar RF power indicator gives a real time view of forward and reverse power. It is indicating the peak power.
The LED bar hold time and the deca speed can be adjusted in the Service Page if desired.
Protection indicators
The protection is implemented in the hardware and
therefore it is independent of the software latenc and
operation. When a protection event is detected JUMA
PA1000 will switch to standb until cleared.
SWR PROTECT ON LED will be lit if the reverse power
limit is exceeded. In this case check antenna, reduce
PA1000 gain or reduce exciter drive.
OVER CURRENT LED will trip if the MOSFET current 30A
is exceeded. In this case reduce the gain (Gx) or reduce
the drive. You can monitor the current in the LCD.
Nominal current for full power is approximatel 24A.
The nominal bias current without drive is 2A ±0.2A.
OVER TEMPERATURE LED will be lit if the MOSFET case
temperature 105°C is exceeded. In this case reduce
power. Over temperature led will go off when the
temperature has fallen below the threshold level.
However amplifier will sta in STBY state until ou clear
it b pushing OPER button.
After ou have checked the protection situation clear it
b pushing the OPER button.
Band selection buttons
Push AUTO button for automatic band selection. Green
LED will be ON and the main displa is showing the
band. If valid band data is not available the main
displa is showing “?? MHz” and PA1000 will not
operate. In this case check band data cable, band data
setting and the baud rate setting of the COM1.
Manual band selection is made b first pushing the
BAND button which after ou can select the band b
pushing and buttons.
In manual band selection there is a special “AllMHz”
band which indicates that the final low-pass filters are
b passed. Do not transmit with “AllMHz” selection
without external low-pass filter because the harmonics
are not filtered.
JUMA PA1000 saves the band selection mode for the
next power-up.
Note. Manual band selection is not recommended
because ou ma inadvertentl select wrong band
which ma damage the amplifier.
OPER / STBY button
Simpl push OPER/STBY button to switch between operate and standb state. LED is ON in operate-state. In start-up
the default state is STBY. This can be modified in the Service Pages so that PA1000 will recall OPER/STBY state for the
next start-up.

JUMA PA1000 User Manual Version 1.50 update 2019-02-01 Page 8 of 19
Quick Start for first time use
Auto band selection.
RECOMMENDED!
1. Connect antenna with coaxial cable.
2. Connect transceiver with coaxial cable.
3. Connect PTT and band data cable from transceiver.
You ma need one or two cables depending on
our transceiver. See the cable instructions. In the
case of JUMA TRX2 PTT cable is not needed.
4. Adjust transceiver RF power output level to 10W.
5. Connect AC mains cable and switch on JUMA
PA1000 b the rear panel switch.
6. After start-up go to the Band Data page b pushing
PAGE button several times. Use ADJUST buttons to
select a compatible band data format. In case of a
serial band data check also the COM1 baud rate
that it matches with our transceiver setting.
7. Push PAGE button several times until ou are back
in the Main Page (Band displa left up).
8. Push AUTO BAND button. LED indicates auto band
and ou should see the band in the main displa
page. Check that PA1000 is tracking the transceiver
band.
9. Push OPER button. LED indicates operate state.
10. Transmit SSB or CW with our transceiver and
watch the output power LED bar.
11. Adjust PA1000 gain with ADJUST buttons in the
main page (G1, G2, G3…) for desired power level on
each band. Note. The max gain setting ma be
limited b MAX EXCITER PWR setting.
Next time use
Simpl switch on PA1000 and push OPER button.
JUMA PA1000 will memorize all other settings.
Quick Start for first time use
Manual band selection.
NOT RECOMMENDED!
1. Connect antenna with coaxial cable
2. Connect transceiver with coaxial cable
3. Connect PTT cable from transceiver. See cable
instructions. In the case of JUMA TRX2 PTT cable is
not needed.
4. Adjust transceiver RF power output level to 10W.
5. Connect AC mains cable and switch on JUMA
PA1000 b the rear panel switch
6. Select manuall correct band with BAND
buttons. Main displa shows the band.
7. Push OPER button (LED indicates operate state)
8. Transmit SSB or CW with our transceiver and
watch the output power LED bar.
9. Adjust PA1000 gain with ADJUST buttons in the
main page (G1, G2, G3…) for desired power level on
each band. Note. The max gain setting ma be
limited b MAX EXCITER PWR setting.
Next time use
Switch on PA1000, check the band and push OPER
button. JUMA PA1000 will memorize all other
settings.
Note. Manual band selection is not recommended
because ou ma select wrong band sooner or
later. Then ou ma end up to accidentall increase
the drive and it ma damage the amplifier.
Warnings!
•Set the exciter power to 10W on ALL modes and on ALL bands in your transceiver.
Never exceed 25W exciter drive power.
•Use AUTO band data with an appropriate cable for your transceiver.
•Antenna tuner is not recommended.
f any tuner is used, tune with exciter low power and disable auto tune for high power.
•n SSB or CW modes adjust gain (Gx) to desired output power. Do not use AM, FM or
digital modes because they may produce damaging high power transients.

JUMA PA1000 User Manual Version 1.50 update 2019-02-01 Page 9 of 19
Rear Panel Connectors
BAND DATA / COM2 Connector
12345
6789
D9 female socket
BAND DATA / COM2 Connector Description
Pin # Description
1 BCD A (Band data) *
2 COM2 RS232 OUT (Serial com output) **
3 COM2 RS232 IN (Serial com input)**
4 BCD D (Band data) *
5 GND (Signal ground)
6 BCD B (Band data) *
7 PTT IN (Parallel with PTT jack connector tip)
8 BCD C (Band data) *
9 BAND VOLTAGE (Input)
*Band data signals are pulled up to +5V with 100k resistors.
**COM2 is used for firmware updates and remote connection
BCD Band Data Table
Band Freq BCD D BCD C BCD B BCD A
160 m 1.8 MHz 0 0 0 1
80 m 3.5 MHz 0 0 1 0
40 m 7.0 MHz 0 0 1 1
30 m 10 MHz 0 1 0 0
20 m 14 MHz 0 1 0 1
17 m 18 MHz 0 1 1 0
15 m 21 MHz 0 1 1 1
12 m 24 MHz 1 0 0 0
10 m 28 MHz 1 0 0 1
6 m 50 MHz 1 0 1 0
All band “AllMHz” 0 0 0 0
BCD code 0000 as an input b passes the low-pass filters
and the displa indicates “AllMHz”.
All other input codes (1011 ... 1111) are not valid and
the are indicated as “?? MHz”. In that case PA1000
will not transmit.
Tip: JUMA PA1000 converts serial, voltage or manual
band data to BCD output on the four BCD lines in D9
connector. This BCD output can be used to control
antennas or other equipment. The output is 0V/+5V
with an output impedance of 1kΩ. Thus the BCD output
signals must be buffered e.g. with a BCD to Decimal
decoder IC. If band data is not available PA1000 will
output BCD code 1111. If “AllMHz” is manuall selected
PA1000 will send BCD code 0000.
PTT in 3.5 mm jack
Plug
Tip is the PPT in signal and it should be grounded for
transmit. PTT signal is in parallel with D9 connector
pin7. PTT signal is internall pulled up to +5 V with a 4.7
kilo-ohm resistor. Current sinking requirement is 1 mA.
The ring terminal is not connected inside PA1000 so you
can also use a MONO plug for PTT connector.
In case of JUMA TRX2 transceiver the PTT cable is not
needed. PTT signal is fed via the input coaxial cable.
COM1 3.5 mm jack
Plug
Jack
This connector is a multi-use serial com for RS232, CI-V.
Tip is RXD and ring is TXD. In CI-V tip and ring must be
connected together in the PA1000 end of the cable.
Note1. Do NOT connect RS232 serial outputs together.
Note2. RS232 serial output can be connected to several
RS232 data inputs.
Note3. Icom CI-V open drain signals can be connected
in parallel with other CI-V signals like logging software.
AC Power Entry Module
Mains power switch, 2 x fuses and mains cable socket.
See the fuse value markings in the rear panel. if ou
need to replace fuses. The two fuses are located in a
small removable snap-in cassette.

JUMA PA1000 User Manual Version 1.50 update 2019-02-01 Page 10 of 19
Cable instructions for transceivers
JUMA TRX2 cable (RS232 band data)
JUMA TRX2 JUMA PA1000
RS232 connector COM1 connector
3.5 mm plug
Note1. Both ends 3.5 mm stereo plugs. A standard stereo audio cable can be used.
Note2. PTT cable is not needed. PTT signal is superimposed on RF in the coaxial cable.
COM C -V cable (Band data)
ICOM JUMA PA1000
CI-V connector COM1 connector
3.5 mm plug
Note1. Both ends 3.5 mm plug. A mono plug can also be used in Icom end.
Note2. A standard 3.5 mm stereo audio cable can NOT be used. PA1000 end of that must be modified as shown.
COM PTT cable
RCA plug JUMA PA1000
Marked SEND in Icom PTT connector
3.5 mm plug
Note1. A mono plug can also be used in JUMA PA1000 because the ring is not connected inside JUMA PA1000.
Note2. In some Icom radios like IC-7100 there is no RCA SEND connector. In that case use ACC connector pin 2 for
GND and pin 3 for PTT (HSEND or SEND). See our Icom user manual.
Elecraft KX3 cables
KX3 RS232 band data cable
KX3 ACC1 connector JUMA PA1000
3.5 mm plug COM1 connector
A standard 3.5 mm stereo audio cable can NOT be used as RS232 cable. 3.5 mm plug
Note1. In KX3 menu set AUTOINF to ANT CTRL
Note2. Select Elecraft Serial band data in PA1000
KX3 PTT cable
KX3 ACC2 connector JUMA PA1000
2.5 mm plug PTT connector
3.5 mm plug