2017年8月3日 · QCX: a feature-packed, high performance, single-band 5W CW transceiver kit, with WSPR beacon and built-in alignment/test equipment. Available for 80, 60, 40, 30, 20 or 17m bands. It has rotary encoder synthesised tuning, VFO A/B/Split, Iambic keyer, CW …

This is the Operating Instructions manual for the QCX, QCX+ and QCX-mini CW transceivers. All versions of the firmware are compatible with all PCB revisions and all models of the QCX family.

The "QCX+" (Q RP L abs X cvr +): a feature-packed, high performance, single band 5W CW transceiver kit with WSPR beacon and built-in alignment and test equipment. Available for 160, 80, 60, 40, 30, 20 or 17m bands. Experimental use on 15, 12, 10 or 6m (lower power output and reduced sensitivity). For complete details see http://qrp-labs.com/qcxp.

The VFO is an Si5351A Synthesiser chip, configured by the microcontroller. A rotary encoder tunes the VFO, with a variable tuning rate. The radio includes two VFOs, A and B. You can swap from one to the other, copy the contents of the active VFO to the inactive one, or operate Split (Transmit on VFO A, receive on VFO B).

VFO/Signal Generator kit. Full description on the QRP Labs VFO kit page. The Si5351A VFO/Signal Generator kit provides two independent output freqeuncies, 3.3V peak-peak squarewave and in the range 3.5kHz to 200MHz (Si5351A..

2022年10月5日 · 不过现在最大的问题是找不到频率合适的晶振来做vfo（高本振）。 目前使用11MHZ晶振作为中频滤波器和BFO（BFO频率大约10.9972MHZ），18MHZ晶振作为VFO，该晶振配合2-40p左右的微调电容，可以振荡在18.000-18.012MHZ，工作在业余频率的范围也就是7.000-7.015MHZ之间。

VFO mode A single press on the right button changes the active VFO mode. There are two independent VFOs named A and B. There are three VFO modes for using these VFOs: • VFO A is active as transmit and receive VFO; if non-zero, RIT is applied during receive •...

The Si5351A VFO/Signal Generator kit provides two independent output freqeuncies, 3.3V peak-peak squarewave and in the range 3.5kHz to 200MHz (Si5351A datasheet spec). An extended range up to 292MHz has been experimentally measured. One output is variable and rotary encoder tuned, the other is fixed (configurable frequency). The kit comprises:

Manuals and User Guides for QRP Labs QCX. We have 2 QRP Labs QCX manuals available for free PDF download: Operating Instructions Manual, Troubleshooting Manual

2020年5月11日 · QCX+: a feature-packed, high performance, single-band 5W CW transceiver kit, with WSPR beacon and built-in alignment/test equipment. Available for 160, 80, 60, 40, 30, 20 or 17m bands. It has rotary encoder synthesised tuning, VFO A/B/Split, Iambic keyer, CW decoder, and more... Click!