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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 FOR EB104
| Capacitor Set |
$ 9.75 |
| 1 ea. |
820pf Ceramic Chip Cap. |
| 2 ea. |
1200pf Silver Dipped Mica |
| 1 ea. |
.001uf 1KV Ceramic Disc Cap. |
| 4 ea. |
0.1uf 100 V Ceramic Chip Cap. |
| 4 ea. |
0.1uf ATC 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 |
$ 18.40 |
| 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 |
|
This Page was last
updated April 18, 2007
