I know, not the best method, but sometimes the desire to just put out some RF trumps proper procedure. Not surprisingly, the real focus of the design is in optimising the input and output networks.įeeling lazy and anxious to just get on the air, I pretty much did cut and paste from some different circuits to find out what works best. There isnt a ton of creativity to be used when designing a linear of this class (Push-pull Class-AB). These things can also take quite a beating from poor mismatches, and have the convienice of having the source connected to the metal tab on the case, making for a nice solid ground connection. Homebrew Amplifier Plans Plus Stores Around.Supplied with full instructions & technical support via email. LED indicators for +50V Supply and PTT bias on. Bias shutdown for PTT (dual mode, either ground or +5-12V input to disable bias) Voltage outputs via an edge connector for thermal and SWR monitoring, suitable for connection to a microcontroller Size: 200 (L) x 100 (W) x 75 (H)mm (mounted on Enigma HS200 heatsink). Tested into open and short circuit loads at the output without damage. Power Gain: >22dB 50mA bias (2W input required for >300W output) On-board directional coupler and precision thermistor for SWR and temperature monitoring Latest high-ruggedness MRFE6VP6300H RF mosfet Fully assembled and tested amplifier building-block For a finished product you will need to add a case, a fan of at least 50cfm, 500W/ 48-50V power supply, coaxial relays, coax cable and connectors.įor those who wish to build this amplifier from scratch, a kit is also available here. The amplifier is supplied completely assembled and tested on a heatsink. This module is suitable for those wishing to build their own home-brew amplifier but lack the experience or test equipment to build and set up a full kit themselves. This new version has several improvements and extra customer-requested features when compared to the previous version : Improved bias thermal tracking, PTT LED indication plus dual-mode bias disable to save power in linear mode during idle. With an output of 300-350W with an input drive of only 2W, this compact module has several novel features and excellent specifications. The Enigma Broadcast 2m high power amplifier v2 is perfect for those wishing to increase their presence on the 2m band.
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