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EB104 600
WATT HF AMPLIFIER
This
push-pull/parallel circuit produces a power output of 600 watts
across the 2 to 30 MHz band using four RF devices without the added
loss and cost of power splitters and combiners. Motorola MRF150 RF
power FET makes it possible to parallel two or more devices a
relatively high power levels. This amplifier can be operated from
supply voltages of 40 to 50 volts depending on linerarity
requirements. The bias for each device is independently adjustable,
therefore no matching is required for the gate threshold
voltages.
SPECIFICATIONS |
|
|
Frequency
Range |
2-30
MHz |
|
|
RF Input
Power |
6
Watts |
|
RF Output
Power |
600
Watts |
|
DC Input
Voltage |
40 to 50
Volts |
|
DC Input
Current |
18 to 20
Amps |
|
|
|
|
R1 - R5 - 10k Ohm
Trimpot |
R25 - thermistor, 10k
(25 degC), 2.5k (75 deg C) |
C17, C18 - Two 0.1 uF,
100 V Ceramic each |
|
R6 - 1k Ohm, 1
W |
C1 - Not
Used |
D1 - D4 -
1N4148 |
|
R7 - 10 Ohm, 1/2
W |
C2 - 820 pF Ceramic
Chip |
D5 - 28 V Zener,
1N5362 |
|
R8 - 2k Ohm, 1/2
W |
C3 - C6, C13, C14 - 0.1
uF Ceramic |
L1, L2 - Two Ferrite
beads each |
|
R9, R21 - R24 - 10k
Ohm, 1/2 W |
C7 - C10 - 0.1 uF
Ceramic Chip |
T1 - T3 - See Text in
EB |
|
R10 - 8.2k Ohm, 1/2
W |
C11 - 1200 pF each (See
Text in EB) |
Q1 - Q4 -
MRF150 |
|
R11 - R14 - 100 Ohm,
1/2 W |
C12 - Not
Used |
IC1 -
MC1723CP |
|
R15- R18 - 1 Ohm, 1/2
W |
C15 - 10 uF, 100 V
Electrolytic |
|
|
R19 - R20 - 10 Ohm, 2
W |
C16 - 1000 pF
Ceramic |
|
|
The above is
a summary description of an HF amplifier described in the MOTOROLA
Engineering Bulletins and Application Notes. These Engineering
Bulletins and Application Notes may be obtained from your local
MOTOROLA office or can be found in the MOTOROLA RF DEVICE DATA
MANUAL. These amplifiers have been designed and tested by engineers
at Motorola.
Component SETS and
prices for EB104 from CCI,USA. Orders by email to:
[email protected] |
|
Capacitor
Set |
$
8.75 |
|
1 ea. |
820pf Ceramic Chip
Cap. |
|
2 ea. |
1200pf Silver Dipped
Mica |
|
1 ea. |
.001uf 1KV Ceramic Disc
Cap. |
|
8 ea. |
0.1uf 100 V Ceramic
Chip Cap. |
|
6 ea. |
0.1uf 1KV Ceramic Disc
Cap. |
|
1 ea. |
10uf 100 V Alum.
Electrolytic Cap. |
|
Resistor
Set |
$
9.95 |
|
4 ea. |
2.7 ohm 1/2 W
Resistor |
|
1 ea. |
10 ohm 1/2 W
Resistor |
|
4 ea. |
100 ohm 1/2 W
Resistor |
|
1 ea. |
2K ohm 1/2 W
Resistor |
|
1 ea. |
8.2K ohm 1/2 W
Resistor |
|
5 ea. |
10K ohm 1/2 W
Resistor |
|
1 ea. |
1K ohm 1 W
Resistor |
|
2 ea. |
10 ohm 2 W
Resistor |
|
5 ea. |
10K ohm Trim Variable
Resistor |
|
1 ea. |
10K(25C)-2.5K(75C)
Thermistor |
|
Semiconductor
Set |
$
2.80 |
|
4 ea. |
1N4148
Diode |
|
1 ea. |
1N5362 28 volt Zener
Diode |
|
1 ea. |
MC1723CP Voltage
Regulator |
|
Ferrite
Set |
$
1.75 |
|
4 ea. |
Fair-Rite 2673021801
Ferrite Beads |
|
1 ea. |
4 inch length AWG#16
Tinned Bus Wire |
|
Transformer
Set |
$
15.95 |
|
1 ea. |
T1 Input Transformer
(wound) |
|
1 ea. |
T2 Balun
(wound) |
|
2 ea. |
T3 Output Transformer
Cores (wound) |
|
Printed Circuit Board
(3 5/8"W x 5 1/8"L) |
$
24.00 |
|
MRF150 Matched Quad
Transistor Set (4 each) |
$256.00 |