SDR 5W AMP
Product Description
5W AMP HF Packer PreAmp Model PA-100 Home Construction Project
This project parts and your efforts will eventually provide you with a compact 0.1 watt input to 5 watt output linear amplifier for use with QRP SSB/CW transmitters on the amateur bands 160 through 10 meters and which can be powered from a 12 volt DC supply. The design is a good balance between output power, physical size and battery power consumption. The completed amplifier will reward the builder with a clean, more powerful output signal for a QRP rig when radio conditions become marginal.
This project is not a beginner's project and requires a medium skill level to complete it successfully. Builders require soldering, hand tool, basic electronics and component identification skills.
The Model PA-100 amplifier module may be mounted within a SDR box thereby keeping the heat and RF out of the computer box and provide a suitable drive signal for the HF PROJECTS HF SuperPackerPro 100W Amplifier. The amp may also be optionally mounted in a stand-alone Bud Box case with the companion HF PROJECTS Low Pass Filter module. In this mode the drive input may be increased to a maximum of 1W at the gates of the MOSFETs. The Pi Resistive Attenuator (R2-R4) may be custom computed for the desired input drive level. Specifications Size 3.7 x 2.4 x 1.4” (LWH, including heat spreaders and spacers) Weight less than 3 oz. When populated Supply voltage 8.5 to 15 VDC (13.8V nominal); no reverse-polarity protection; Current drain, Standby approximately 30mA Transmit 1-1.3 A at 8 Watts Filter Selection 6-position rotary switch (ext filter reqd) Frequencies 160, 80, 60-40, 30-20, 17-15, 12-10 M Control Standby/Operate, PTT Input 2-pin Friction lock plug 0.1” 50 ohm Indicator none Output 2-pin Friction lock plug 0.1” 50 ohm Power cable 2-pin Friction lock plug .156” Drive requirement 0.1 watts RF (with internal 0.1dB pad) Power output 3-8 watts RF 160 – 10 meters Duty cycle Designed for intermittent SSB service Forced air 100% Intermittent 50% Spurious products -40 dB or better @ 5 watts w/ext filter Harmonic content -45 dB or better @ 5 watts w/ext filter Load tolerance 2:1 or better SWR recommended T-R delay approximately 0.2 second Control RF sensing or isolated PTT T-R relay Specifications above assume a 13.8 VDC supply and 50-ohm load at the antenna.
This project parts and your efforts will eventually provide you with a compact 0.1 watt input to 5 watt output linear amplifier for use with QRP SSB/CW transmitters on the amateur bands 160 through 10 meters and which can be powered from a 12 volt DC supply. The design is a good balance between output power, physical size and battery power consumption. The completed amplifier will reward the builder with a clean, more powerful output signal for a QRP rig when radio conditions become marginal.
This project is not a beginner's project and requires a medium skill level to complete it successfully. Builders require soldering, hand tool, basic electronics and component identification skills.
The Model PA-100 amplifier module may be mounted within a SDR box thereby keeping the heat and RF out of the computer box and provide a suitable drive signal for the HF PROJECTS HF SuperPackerPro 100W Amplifier. The amp may also be optionally mounted in a stand-alone Bud Box case with the companion HF PROJECTS Low Pass Filter module. In this mode the drive input may be increased to a maximum of 1W at the gates of the MOSFETs. The Pi Resistive Attenuator (R2-R4) may be custom computed for the desired input drive level. Specifications Size 3.7 x 2.4 x 1.4” (LWH, including heat spreaders and spacers) Weight less than 3 oz. When populated Supply voltage 8.5 to 15 VDC (13.8V nominal); no reverse-polarity protection; Current drain, Standby approximately 30mA Transmit 1-1.3 A at 8 Watts Filter Selection 6-position rotary switch (ext filter reqd) Frequencies 160, 80, 60-40, 30-20, 17-15, 12-10 M Control Standby/Operate, PTT Input 2-pin Friction lock plug 0.1” 50 ohm Indicator none Output 2-pin Friction lock plug 0.1” 50 ohm Power cable 2-pin Friction lock plug .156” Drive requirement 0.1 watts RF (with internal 0.1dB pad) Power output 3-8 watts RF 160 – 10 meters Duty cycle Designed for intermittent SSB service Forced air 100% Intermittent 50% Spurious products -40 dB or better @ 5 watts w/ext filter Harmonic content -45 dB or better @ 5 watts w/ext filter Load tolerance 2:1 or better SWR recommended T-R delay approximately 0.2 second Control RF sensing or isolated PTT T-R relay Specifications above assume a 13.8 VDC supply and 50-ohm load at the antenna.
Accessories
Cable Set, Fabricated Inductors and more Installed on PCB This option when added to order, uses the parts provided with the project to create a set of cables: RF In, RF Out, Power In, Cable to LPF, Cable from LPF. Proper tooling used to crimp connections. Ferite beads are placed on the RF In and RF Out cables to stop RF on the coax shields. The 8 inch RF Cables are prepepared by unterminated on the external side. Attach to appropriate BNC or SO239 of your choice. The inductors: L1,L2,L3,L4,L5,T1,T2 and T3 are wound and mounted on the circuit board. The surface mount transistors, Q1 and Q2 are installed on the board. This option reduces the complexity of the project from medium skill level to first-time builders skill level. Installation and soldering of common parts required. $42.00 |
