|
Up
| |
EB27A 300 WATT HF AMPLIFIER
The EB27A HF amplifier is a push-pull linear amplifier for
300 watts of PEP or CW output power across the 2 to 30 MHZ band. One of
Motorola's new high-power transistors developed for single-sideband, the
MRF-422, is used in this amplifier design. The EB27A operates from a 28 Vdc
power supply .
SPECIFICATIONS: 
| Frequency Range |
2 to 30 MHZ |
| RF Input Power |
18-20 watts (typical) |
| RF Output Power |
300 watts |
| DC Input Voltage |
28 Vdc |
| DC Input Current |
20 amps (typical) |
| C1 - 100 pf chip |
C16 - 1000 pf |
R10 - 8.2K, 1/2 W |
| C2, C3 - 5600 pf chip |
R1, R2 - 2 x 3.3 ohm, 1/2 W
in parallel |
R11 - 1.0 k Trimpot |
| C4, C5 - 680 pf chip |
R3, R4 - 2 x 3.9 ohm, 1/2 W
in parallel |
D1 - 2N5190 |
| C6, C7 - 0.01 uf chip |
R5 - 47 ohm, 5 W |
L1, L2, - Ferroxcube VK200
20/4B |
| C11 - 470 pf chip |
R6 - 1.0 ohm, 1/2 W |
L3, L4 - 6 Ferrite beads
each, Ferroxcube 56590 65/3B |
| C12, C13 - 0.33 uf chip |
R7, R8 - 1.0 K, 1/2 W |
Q1,Q2 - MRF422 |
| C14 - 10 uf - 50v Elect |
R9 - 18 K, 1/2 W |
Q3 - 2N5990 |
| C15 - 500 uf - 3v Elect |
|
|
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 EB27A
| Chip Capacitor Set |
$ 8.25 |
| 1ea. |
100pf Ceramic Chip Cap. |
| 1ea. |
470pf Ceramic Chip Cap. |
| 2ea. |
680pf Ceramic Chip Cap. |
| 2ea. |
5600pf Ceramic Chip Cap. |
| 2ea. |
.1uf Ceramic Chip Cap. |
| 2ea. |
.33uf Ceramic Chip Cap. |
| Discrete Cap Set |
$ 1.35 |
| 1ea. |
.001uf 1Kv Ceramic Disc Cap. |
| 1ea. |
10uf 100 Vdc Electrolytic Cap. |
| 1ea. |
470uf 6.3 Vdc Electrolytic Cap. |
| Resistor Set |
$ 4.45 |
| 1ea. |
1 ohm 1/2W Resistor |
| 4ea. |
3.3 ohm 1/2W Resistor |
| 4ea. |
3.9 ohm 1/2W Resistor |
| 2ea. |
1K ohm 1/2W Resistor |
| 1ea. |
8.2K ohm 1/2W Resistor |
| 1ea. |
18K ohm 1/2W Resistor |
| 1ea. |
47 ohm 5W W.W. Resistor |
| 1ea. |
1K ohm Trim Variable Resistor |
| Semiconductor Set |
$ 4.95 |
| 1ea. |
2N5192 Transistor |
| 1ea. |
2N6488 Transistor (with mounting hardware)(2N5991
replacement) |
| 1ea. |
MC1723CG Voltage Regulator |
| Ferrite Set |
$ 4.80 |
| 12ea. |
56-590-65-3B Ferrite Beads |
| 2ea. |
VK200 20/4B Ferrite Choke |
| Transformer Set (wound) |
$ 12.80 |
| Printed Circuit Board (3 5/16"W x
5 3/4"L) |
$ 14.00 |
| MRF422MP Matched Transistor Pair |
$
84.00 |
|
This Page was last
updated April 17, 2007
