MFJ 2-Meter Linear Amplifier
Introduction:
The MFJ-8802 is a back-to-basics multi-mode 150-Watt VHF
linear power amplifier for 2-Meters. A pair of high-tech Mitsubishi 12-volt FETs
deliver high gain and stability with excellent linearity. Buffered T/R switching will
interface with virtually any multi-mode transceiver amplifier keying circuit. Drive
requirement is 5 Watts for full output, making it compatible with low-power
multimode radios such as the FT-817, KX-3, other QRP SDRs, and most popular
2-Meter transverters. A simple input-attenuator may be added to accommodate
10-to-25 Watt radios. SWR load-fault circuitry protects output transistors from
severely mismatched loads. By keeping circuitry simple, the MFJ-8802 is
designed to deliver a potent transmit-signal boost at a truly affordable price.
Specifications:
Input:
5 Watts (10/25 Watts with optional attenuator).
Output:
150 Watts PEP SSB/CW, 140-Watts FM*
Harmonics:
> 60 dBc
Input
SWR:
<1.5:1
Antenna
SWR:
2:1 or less
Keying:
Logic-low or ground contact.
Power:
13.8-Volts at 25 Amps
Size:
5" x 6" x 3"
Weight:
3 lbs.
*Heat-sink fan required for extended FM transmissions or key-down digital
modes.
Connections and Controls:
1. Power Switch:
Applies DC to amplifier circuitry.
2. RX LED:
Lights when unit is in receive (bypass) mode.
3. TX LED:
Lights when unit is keyed in transmit mode.
4. Load Fault LED: Lights when SWR protection circuit shuts amplifier down.
5. Key Line: RCA female, ground or logic-low input activates transmit mode.
6. Radio Input:
BNC female, exciter input line from transceiver.
7. Antenna:
UHF female, connects amplifier output to antenna or load.
8. Power Line:
Polarized Power-Pole or Molex pigtail available.
TX
RX
Power
1
2
3
5
6
7
Antenna
Radio Key
4
Fault
Load
8
