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I thought it would be fun to dig into this small transceiver. I bought it cheap so I took my chances.
It needed a IRF510, a new BS170 and some traces had to be rebuilt. The BS170 is the switch that puts RX when you ptt. It was blown and had to be replaced.
It is version 4 board.
I want to thank the USDX Facebook group for the support. I hope this video helps others.
It is a nice radio but very sensitive to antenna missmatch so be prepared to have some spare RF510 transistors
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