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RF Power Amplifiers - $1 (Chester)
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The following RF Power Amplifiers are Broadband power amplifiers and were built with readily available kits and parts.
Some of these are working and non-working units. All three of these are based on the same/similar concept and design. I have full data sheets, application notes and schematics on these and can provide any additional details as needed.
---1st amp shown is a 24VDC, 30W 30-150Mhz amplifier utilizing the Motorola MRF-136Y MOSFET. This also incorporates a 1.6W 1-250Mhz CA2832C Pre-driver and a Ferrite splitter on the output. Each output port is designed to produce approx. 8 watts output. Has safety keying and AGC circuits incorporated and is Fully operational. $75 obro
---2nd amp shown is a 24VDC, 300W, 10-175Mhz Broadband Linear/non-linear amplifier utilizing the MRF-141G MOSFET and is based on the AR313 kits available at Communications Concepts Inc. (links below). There are two of these available but both are non working units. SMA connectors for input and BNC connectors for output. These draw approximately 20A @24VDC and have adjustable bias control for linear or non-linear applications. These can have new transistors purchased or can just utilize the copper heat spreaders, aluminum heat sinks and boxes for your own designs.$100 ea. obro
---3rd amp shown is similar based on the above two amplifiers combined (driver and amp minus pre-driver). This also has the Output ferrite cores removed as it was designed for VHF (75Mhz) communications. This is using a 19" rack mount heatsink and has a lowpass filter installed. Fully operational. $175 obro
https://www.communication-concepts.com/ar313-subkits/
https://www.communication-concepts.com/ar305-313-printed-circuit-board-set/
https://www.communication-concepts.com/application-notes-1/
Radio, Ham radio, amateur radio, CB Radio, Citizens band radio, HF, VHF,