Search results

Query: yaesu ft 277
Links: 1  |  Categories: 0
  • Repairing Yaesu FT-817 Fail TX on 144 MHz
    No votes
    Radio Equipment > HF Transceivers > Yaesu FT-817
    Repairing Yaesu FT-817 Fail TX on 144 MHz — EA3BIN
    An FT-817 ceased transmission on the VHF 2m band, despite the other HF, UHF, and 50 MHz bands operating correctly. Suspecting an excess of input signal during FT-8 mode transmission, they conducted measurements with an oscilloscope, revealing a burnt-out PIN diode, identified as D3003, type HSU277, on the PA unit board. Following the replacement of this surface-mounted diode, their FT-817 resumed operation on the 144 MHz band.