Hans, Yes my calibration was off my by offset frequency of 600 Hz. For me it is hard to make the adjustment by zero beat so I used my FT450 as a standard and set both radios to the same frequency. I t

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How I calibrated my qcx 40 was to listen to 7.0475 and compare both sidebands I adjusted the frequency calibration until I got the tone the same by ear on both upper and lower sides. Although not true

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Hi Dan The displayed frequencies are always the actual transmitted frequency. During receive operation, the 700Hz offset (or however you configured it) and the RIT are added to the displayed frequency

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It sounds like it is correct

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Is the upper left displayed frequency A) during receive mode the transmit frequency or B) is it the transmit frequency netted with the offset frequency in the receive mode. I thought the displayed fre

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I observed behavior that was not fully described in the online Operating Manual as I continued to explore the capabilities of the VFO/Sig Gen kit. Page 2 of the attached Operating Guide documents my o

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I devised the attached state diagram to help me remember the operating procedures for the Si5351A VFO/Signal Generator. Others may find it useful. 73 -- Brian K1LI

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It is also worth checking that the components actually have the values marked on them. I was building a Heyphone, an SSB rig for cave communications, and discovered (fortunately before I soldered them

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Yes, but the point made was that too many constructors leap to the conclusion that their work is perfect and the reason for it not working is component failure. In nearly all cases there is a construc

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Interesting that you should mention that! "Rarely" is not the same as "never." Just yesterday I did some troubleshooting on a U3S that had died after about a year's service. All the programmed functio

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Hans, Wanted to thank you for the troubleshooting manual. Built my 40m QCX and went together easily and worked exactly as it should. Then I decided to add an audio amp and speaker. After an hour or so

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Hi all, I would encourage everyone who didn't so far read the full manual that Hans put together. It makes for a comprehensible complete reference of all QCX features and much more. For instance I lea

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