Hello, Last weekend I was realizing that I cannot hear stations which usually were received S9+20dB (on tropo) on 144MHz. Half a year ago I've noticed that the sun noise were almost "nul" on Sun/50ohm noise test. Usually I detect about 2dB Sun noise over 50ohm (or more) on SFU 70. Bay passing the LNA (a MGF1302 classic design), the reception come alive as usual. Now it comes the interesting part... I measure the MGF1302's Drain-Source voltage which was 3V (normal). The Drain current were 10mA (normal also). I apply an unmodulated sinus signal at the input of the LNA and measure it at the output with an oscilloscope. The wave were undistorted and about 20dB amplified (normal amplification also). The final test were with a FM modulated signal but with the LNA connected to a TH214 FM hand-held. Without LNA, the FM signal were readable down to -120dBm with no S-meter indication. With LNA, even on "S9" indication, the modulation were very weak! Replacing the MGF1302, the LNA comes back to life. The Signal to Noise ratio were about 20dB better than only with the TH214 (measured with Spectran). This is due the amplification not the S/N improvement! The noise floor were improving with 6dB and this was the real noise improving due to LNA which was almost the same like before MGF1302 crashing. Now, from the above, electrically can say that MGF1302 were working normally on static and dynamic regime except its noise performance. The question is: What is the explanation for this phenomenon? Is there anybody being on the same situation before? What were the symptoms? Sorry for the "long story" but I consider to be interesting for others too (especially the troubleshooting part). Look forward for your ideas/explanation. 73 de YO3FFF Cristi