PA50WV VHF 2M
50 Вт для диапазона 2 м.
01 / 03 — Вид спереди
УКВ-усилитель для частот 136–174 МГц. Входной и выходной импеданс 50 Ом, малошумящий усилитель при приёме; питание 12–16 В.
- Power
- 50W
- Impedance
- 50ohm
- Weight
- 1.7kg
- Band
- 2 м
Capabilities
Linear amplification
PA50WV is a 50 W power amplifier for linear amplification of RF signals on the 2 m band.
- A Mitsubishi RA60H1317M amplifier module is used to deliver 50 W of VHF output power.
- The amplifier uses a conventional single-ended circuit and supports all modulation modes.
No retuning required
Active broadband components eliminate the need for adjustment or tuning throughout the operating frequency range.
- Active cooling allows continuous-carrier operation for extended periods at full output power.
Operating scenarios
- 01
Long-distance contacts
For operators making long-distance contacts on the 2 m amateur band.
- 02
Digital modes
The amplifier can operate continuously for extended periods, including in digital modes.
- 03
Vehicle installation
Installation in a vehicle together with a SunSDR2PRO transceiver.
Features
50 W
PA50WV provides clean signal amplification up to 50 W over the 136–174 MHz range. The amplifier can operate continuously for extended periods, including in digital modes.
1 W or 5 W input
The Pin button selects the setting for 1 W or 5 W of input power.
Compact format
The amplifier measures 185 × 165 × 83 mm including the cooling module and weighs 1.7 kg, making it suitable for DXpeditions.
Built-in LNA
The +19.5 dB low-noise amplifier is enabled with the LNA button and operates on receive. Its power is removed when switching to transmit.
LNA in practice
Receive with the LNA
With the TX control input open, the amplifier is in receive mode. The LNA button enables +19.5 dB of low-noise amplification for weak received signals.
Switching to transmit
The LNA is automatically powered down when switching to transmit. Additional receive-path gain applies only in receive mode.
What the indicator shows
If LNA mode is selected, the LNA indicator remains lit during transmit. It shows the selected mode even while the LNA itself is unpowered.
Measurement example
The measurement was made with a SunSDR2PRO transceiver at 145.1 MHz in CW, with a 500 Hz receiver bandwidth and an input signal level of −110 dBm.
LNA off
LNA off: signal −112.2 dBm, noise −122.4 dBm
LNA on
LNA on: signal −93.9 dBm, noise −120.3 dBm
The signal increased by 18.3 dB, while the receiver noise increased by only 2.1 dB. The signal-to-noise ratio improved by 16.2 dB: a station that was barely intelligible can now be received clearly.
The improvement depends on the antenna, feed line and noise conditions at the operating location: the lower the receiver's own noise, the less an external preamplifier will contribute. These figures are the result of a specific measurement, not a guaranteed specification.
Connections and controls
Front panel
FWD indicates RF power transmission.
REF indicates an SWR above 3:1. There is no automatic SWR shutdown: stop transmitting and check the antenna and feed line.
Pin selects an input level of 1 W or 5 W.
LNA enables the +19.5 dB receive preamplifier; an open TX control input corresponds to receive mode.
On transmit, LNA power is removed, but the LNA indicator continues to show the selected mode.
PWR switches the amplifier on. When it is off, ANT and RADIO are connected directly.
Rear panel
ANT connects a 50-ohm antenna.
+12V connects a 12–16 V, 16 A power supply.
TX accepts the external transmit-control signal.
RADIO connects a transceiver with a 50-ohm output.
Transmit control and power
- 01
External PTT signal
The amplifier switches to transmit in response to an external control signal from the transceiver through the “TX” connector. PA50WV has no RF detector: an input signal alone does not switch it to transmit, so the transceiver must provide a PTT control output.
- 02
Power is set at the transceiver
Pin selects a 1 W or 5 W input level; nominal output is 50 W in either setting. Output follows drive: 2.5 W in the 5 W setting gives roughly half the output power. There is no separate power control or ALC; set power at the transceiver.
- 03
Limit the drive power
Set the maximum drive in the transceiver software’s “Power correction” menu. The firmware-level limit restricts power spikes that could damage the amplifier. Do not exceed the input power allowed by the selected setting.
SpecificationsPA50WV VHF 2M
Specifications
| Amplifier control connector type | RCA |
|---|---|
| Frequency coverage | 136...174 MHz |
| Input/output impedance | 50 ohm |
| Input signal amplifier in receive mode | +19,5 dB |
| Nominal output power | 50 W |
| Power connector type | Anderson Power Pole |
See all specifications for details