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RX-320 Update - Blown FET's
Jim schrieb: I also put a pair of back-to-back glass switching diodes across the external antenna input (across the 2.2K resistor that had already been added by TenTec to bleed off static buildup), so in future the diode should blow rather than the FET's. It seems that almost the whole factory is up at Dayton.... he he.. The same many have done to the Sony ICF2010/ 2001D to prevent blowing the FET (again). I did 2 times 2 diodes in series antiparallel for 0.7 Volts for each diode. So in addition there is a maximum voltage of 1.4 volts to the antenna input. This one diode with 0.7 volts could make you think your S-meter reading is going nuts as it will never show more than S9+10dB or so. Even the 1.4 volts of 2 diodes in series will only give you addtional 3dBs. Just a thought.... |
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