I did not calibrate my K3s smeter on initial assembly, nor have I done it since, so the following is as per factory setup with no atten or preamp, AGC-F, RFgain Max. The radio has KFL3B-FM, KFL3A-6K, KFL3A-2.8K, KFL3A-400, and KBPF3A installed.
Injection of a 50uV signal (50 ohms) (-73dBm) at 7.05 MHz produces an S9 reading and the P3 indicates about -76 dBm. It falls to about S8 with 50 Hz bandwidth setting. (I have not performed any filter calibration) Injection of a 50uV signal at 1.4 MHz produces an S8 reading and the P3 indicates about -83 dBm.. A local broadcast station on 1450 kHz produces -10dBm into 50 ohms from my antenna, as measured with a calibrated Anritsu MS2034A spectrum analyzer. Applying this signal to the K3s thru an attenuator indicates the signal is about 70 dB over S9. Removing all attenuation results in good audio but with some crackling. The carrier display on the P3 is not stable under these conditions. Tuning down to 640 KHz KFI produces a -20dBm signal into the K3. Listening to KFI under these conditions produces clicks at times but the audio is generally very good. This may not be anything to do with crackling noticed by others but better documents the problem I had. 73 Brian KF6C. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
