Many mobile phones have superb tiny speakers, so why not put one in the KX3? The internal speaker is awful, it resonates and buzzes on CW, it's not too bad on SSB. In addition, if you want to remove the batteries for charging, you risk breaking the weak ribbon cable every time you open the case. The spring battery holder isn't capable of supplying more than a few mA, not 2 to 3 Amps. Even with good 2500mAh NiMh cells, after a couple of hours you will find transmitting at 3 Watts starts to give low battery warnings. Even after careful alignment, the in band image is only 40 to 50 dB down, an S9 +20 dB CW signal will appear 1.5 KHz (with 750 HZ sidetone) away at S5! The specification is better than the above figure, but only applies to the very narrow alignment tone, dropping to around 45 dB a few HZ off. The receiver is direct conversion with clever audio phasing to minimise the image, this is not totally effective, especially on CW. The connectors on the left hand side plate are flimsy, perhaps no worse than many other radios, but but still not good. The I/Q output works well with the free NaP3 software to give a nice panoramic display on a PC.Įxcellent SSB TX audio, the speech processing works well. Very straightforward to operate and a CW OPs delight. Virtually silent operation, with only the odd relay click (handy when the OH is asleep nearby). Very smooth audio and no signal reduction at 200 ~ 250 Hz bandwidth. My "new to me" KX3 came with the optional audio roofing filter, I've since added the ATU board and a 3rd party "Windcamp" heatsink.Įxcellent frequency stability, especially after running the extended temperature calibration. I made an offer and now have a 5xxx serial KX3. This year a friend was looking to sell his KX3, replacing it with a KX2 for better "SOTA" capability. The K2 is larger than I liked and always fancied replacing it with a KX3. I've used my K2 on overseas holidays for many years. The problem didn’t reoccur, but was a significant issue at the time, hence dropping a rating on here. The breakthrough occurred for around 20 minutes and was present on all bands, the ATU didn’t make any difference, neither did RF gain, attenuator, etc. The antenna was a 30/30/15 ground plane used with an effective common mode choke on the feeder. Since the original review, I had a problem with a broadcast station breakthrough while operating overseas. No big issues with mine, but could be better Mic with UP/DN buttons, KXPA100/KXAT100 100-W amplifier and (KXPD3), internal 2-meter module (KX3-2M), MH3 compact hand Module (KXF元), attached high-performance keyer paddle Interal NiMH battery charger (KXBC3), dual roofing filter * Options: internal wide-range antenna tuner (KXAT3), * Includes RX I/Q sound-card outputs works with PC RS232 or * Operates in data modes (PSK31/RTTY) with or without a * Software-defined radio (SDR) architecture plus optional * Advanced DSP provides dual watch, noise reduction, noiseīlanking, autonotch, stereo audio effects, audio peaking * Current drain as low as 150 mA internal battery (8 AA * SSB/CW/DATA/AM/FM modes 10 W+ PEP (100 W with KXPA100 Transceiver for home, mobile, or field use. Ultra-portable, all-band/all-mode high-performance EMail SubscriptionRegistered users are allowed to subscribe to specific review topics and receive eMail notifications when new reviews are posted.
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