Re: QMX: No "pop" on power up; No USB device.
Hello! When connected LIN_REG_EN to ground, current is more than 5 amp. What could be the cause of the malfunction? Which diode or transistor has failed?
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Nurlan
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#112935
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Re: AGC for the QMX?
Hans I don't think there is.. That is why it would be nice to have the option to save agc state by mode.. On for CW and OFF for digi. Sorry i was not clear. Nic
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Nic Heath
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#112934
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Re: Buck Converter Confusion
To start with DROK is a brand not a specific model and they may at least 20 different units for regulation. So it begs the question which Drok unit was used. The .3V spikes suggests that the unit is
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ajparent1/kb1gmx
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#112933
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Re: Buck Converter Confusion
Burt, I bought one of those DROK units a few weeks ago to reduce 12Vdc down to 5Vdc for my Pi. But I found that it has 0.3V spikes riding on top of the 5Vdc output, and I'm not sure if the Pi will
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Ed - K9EW
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#112932
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Re: QMX CW keyer stuttering
Yes, I'm seeing this as well. Frustrating since I'm trying, finally, to become proficient with using an iambic paddle. I thought disabling the decoder might help so there's less the processor has to
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Roy - KI0ER
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#112931
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Re: QMX Remote Power up-down
Nice implementation, Randy. -- 73, Dan? NM3A There are moments when everything turns out right .... Don't let them alarm you; they pass. -Jules Renard
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Daniel Walter
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#112930
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Re: #qmx QMX dead after loose battery connection
#qmx
Ray, et al, I put a thin nylon washer under the screw closest to the power jack. The screw head now rests on the bottom cover and there is no way things can short out there now. -- 73, Dan? NM3A
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Daniel Walter
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#112929
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Re: QMX CW keyer stuttering
er um ...try (cw) timing or (cw) lag or (cw) issue...the search engine is rather poor on groups.io....as it will (sadly) miss words like "studder".... es vy 73 om de "Baab" w9ya
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Bob Finch
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#112928
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Re: QMX CW keyer stuttering
Yep....lots of us have noted this herein. i.e. And a search herein will uncover the discussions of this anomaly. es vy 73 om de "Baab" w9ya
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Bob Finch
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#112927
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QMX CW keyer stuttering
I haven't seen a thread on this, but my QMX keyer occasionally stutters in Iambic-B mode. I have to send a series of dits and repeat when it happens. I'm trying to pin it down, but it seems like the
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K9NUD-Steve
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#112926
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Using QRP Labs material for local HAM Radio Club presentations and web presentation
Hi Hans, I recently gave a short talk at our local HamRadio Club presenting the QMX, its technology and my experience with building and using it. I used some of your QRP Labs material that is inside
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DD4WH
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#112925
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For sale QCX+ 80m
Hello everyone I am selling a QCX+ 80m assembled and tuned by QRPLabs. 73 QRO Gilles
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F1BFU - Fr - 79
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#112924
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Re: Bug? QMX firmware: Changing "delim" to "." instead of "," breaks CAT control (in WSJT-X anyway)
FYI, I'm not seeing that issue at all with my QMX. I'm using Kenwood TS-440s for the radio in WSJT-X. Roy KI0ER
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Roy - KI0ER
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#112923
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Bug? QMX firmware: Changing "delim" to "." instead of "," breaks CAT control (in WSJT-X anyway)
Similar issue seen in post /g/QRPLabs/message/44399 In QMX FW version? 1_00_10 when changing the display setting to show delimiter "." (point/period) instead of "," (comma) CAT
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kontraptioneering@...
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#112922
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Re: AGC for the QMX?
Can¡¯t AGC be performed after an FFT to lower a narrow signal? The FFT would cause a slight delay but it seems like any other solution is throwing out the baby with the bathwater. -- Colin - K6JTH
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Colin Kaminski
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#112921
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Re: AGC for the QMX?
Thanks, Hans! Does AG take the same values as the individual per band gains in serial terminal setup? Is the gain set using AG persistent through power down / up? 73, Mike KK7ER
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Mike KK7ER
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#112920
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Re: QMX Remote Power up-down
Don, the reed relay was a great idea that I wasn't able to execute. Everyone loves a good electromagnet, but how many of us can actually figure out how to get it just the right amount of pull to
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Randy Paulson
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#112919
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Re: AGC for the QMX?
Hi Ryuji, I'm thinking of AGC at baseband to manage the dynamic range of the audio and take advantage of those 8 unused bits for wsjtx. 73, Mike KK7ER
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Mike KK7ER
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#112918
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Re: #qmx QMX dead after loose battery connection
#qmx
Hi All, Something to be on the lookout for.. When installing the bottom cover check and see if the tabs on the power socket are touching it. In my case it was. yes I know the cover is anodized but in
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Ray Worrall
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#112917
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Successful QCX (classic) repair by W1NC/Jeff
I wanted to share my experience with group working with Jeff/W1NC to resuscitate another Qxx device.? The patient this time was an original QCX v4 that had developed clicking in the audio and a few
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Stacey (KB7YS)
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#112916
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