• DESCRIPTION


This custom designed HF QRP amplifier intended for QRP :) operations or as driver for big gun PA. Amplifier is great for low power SDR - Red Pittaya, SDR DUO - just 1 mW input RF power for 100W output.  This amplifier produced from high quality ORIGINAL parts, such as pair RD15HVF1, pair RD100HHF1 Mitsubishi transistors, OPA2674 IC and AMIDON cores. PA PCB mounted on aluminium heatsink for good cooling.  PA has very flat frequency response from 1 MHz to 55 MHz


Nominal power supply is 13.5v

Nominal current is 17A

Maximum current is 20A

Idle current is 0.4A (per one RD100, adjustable)

Input frequency 1-55mHz

Input and output impedance is 50 Ohm

Nominal input power is 0dBm (1mW)

Maximum input power is 4dBm (2.5mW)

Nominal output power 50dBm (100W CW)

Maximum output power is 51dBm (125W CW)

Measured IMD3 performance is -32dB for nominal power

Board size is 176x110 mm

Heat sink size is 200x120x37 mm




  • SHIPPING

We are open and active, regadless of the war. This is our way of supporting Ukraine's economy. Postal Service is fully operational where we are.

We ship worldwide from Ukraine, by Registered Airmail with tracking number. After package leaves Ukraine you can track it through your local Postal web site. We ship next business day once the payment received. Delivery time depends on destination and your local customs clearance speed. It generally takes about 15-25 business days.