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VA7MM and VE7VV have collaborated in making low-frequency modifications the the MRF-101 100W amp. The resulting amp can be built on the standard eval board using different components. A comprehensive paper describing the project can be found here:
https://www.qsl.net/ve7vv/Files/100WBroadbandLF+MF+HF_RF_Amplifier-R28Jan21.pdf
Here is a photo of the completed amp with low-pass filters for the 2200M and 630M amateur bands also described in the paper.
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