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Yaesu FT-857 Six meter transmitter oscillation.

Initially a breakdown occurred probably due to the reckless increase in transmission power parameters. After changing the failed Q1006 & 1007 mosfet drivers from some 2SK2975 to some RD07MVS1, the transceiver recovered the output power, except for the 70cm band where it did not exceed 3W. By...
- EA1AWY
- Post #11
- Nov 7, 2024
- Forum: Ham Equipment

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