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QMX+ reliability
I've been following QRP Labs since before its inception and praise the quality of design, build and support for the kits, as well as the innovative inspiration that brought them to market. However,
By Mike · #137125 ·
10m band configuration
What should be the ideal values? 73! de Bekir TA2RX
By ta2rx bekir · #137124 ·
Re: Shack Clock build
I thought about that too. Thanks for the suggestion! -- 73, Dan - W2DLC
By Daniel Conklin · #137123 ·
Re: Shack Clock build
You’d be better using high value resistors to bleed off the static, in my opinion.
By Rowan G0KLH · #137122 ·
Re: Shack Clock build
Bruce, That's the way I had it? but I found it awkward to have to reach into the back of the case to program the clock. Another issue has come up? which is that any static discharge from me walking
By Daniel Conklin · #137121 ·
Re: Your QMX output experiences @12volts...?..and by the way, what an amazing radio.
I use both color-coding and housing orientation to avoid this; my 12V is ARES standard, other voltages have different housing colors and orientations, they will not physically plug together if
By Donald S Brant Jr · #137120 ·
Re: QMX+ over-voltqge?
The QMX has a protection circuit that will shut off the transmitter if the supply voltage is dangerously high, or too low. It will warn you by flashing the battery symbol on the front panel. I
By Chuck Harris · #137119 ·
Re: QCX WARC Party - January 2025
My first participation with my new QMX, tnx for all QSO's and hpe cuagn 13:00 - 14:00 4 QSO'S, 2 QCX user: DK3UW,GI0BEY 19:00 -20:00 1 QSO, no QCX user 73 Tom DK3DUA
By Tom, DK3DUA · #137118 ·
Re: QMX+ rev. 1 Crowbarred PA #amperage #magicsmoke #problem #bullshit #q507
Your fault finding approach is not really going to work. You seem to be using the scope for supposedly precise DC readings and not providing the correct power supplies to get meaningful results
By Bruce Akhurst · #137117 ·
Re: QMX+ over-voltqge?
It was clearly working when it was dispatched ?- so we will shortly know. ?(Unless you transmitted I’d be surprised but … ) I would suggest getting set up for a logical test process, Dummy
By Bruce Akhurst · #137116 ·
Re: Cannot change the mode on QMX+
Thank you so much Stan. This did solve the problem to a certain extent. That is, once I change the mode to digi using Putty as per your instructions I can control the rig via WSJTX without any
By ta2rx bekir · #137115 ·
Re: Shack Clock build
Interesting. ? I built mine with built in GPS as a ‘self contained Ham Block’ It has no external switches at all. ?Give it power and it runs. ?Vice versa ? The programming switches are
By Bruce Akhurst · #137114 ·
Re: QMX(+) Build experience, Poor Audio Filter Sweep/RF Filter Sweep/Image Sweep/ADC IQ test and resolution with new PCM1804
I am, in all likelihood, one of those hit by the? PCM1804 problem.? I have read threads about replacing it and bought replacement chips and the necessary tools, but I doubt my eyesight and?
By Fernando TUSELL, EA2BEE · #137113 ·
Re: Blocking a band on QMX/QMX+
Hi Larry Cuurrently the only way is to reconfigure your band configuration screen to delete the bands you don't want. In future I will add a toggle so that a band can still be in band configuration
By Hans Summers · #137112 ·
Re: Your QMX output experiences @12volts...?..and by the way, what an amazing radio.
My QMX-Plus has steeper selectivity skirts (programmable) than my FT-891.? With both set to a 50 hz bandwidth setting listening to CW at the lower ends of 20 and 40 meters, my QMX+ seems "quieter"
By Mark K9TR · #137111 ·
Re: Your QMX output experiences @12volts...?..and by the way, what an amazing radio.
The ATU talk makes me cringe as well, but because it can do the opposite of protecting your radio.? When it's looking for the lowest possible match, it will explore some regions of potentially high
By Jerry Gaffke · #137110 ·
QMX+ over-voltqge?
Hello all. I bought a built QMX, being in my early 80s and not quite up to building a complex QRP Labs kit. When it arrived, I unpacked it and plugged in the PS IO use for the K3. Looking at the
By K9SW · #137109 ·
Re: Your QMX output experiences @12volts...?..and by the way, what an amazing radio.
Some really interesting perspectives here. I grew up in ham radio during high school and mandatory code--I consider myself lucky. 80 percent of my qso's are cw. licensed since 82...none of that
By Scott VY1CO · #137108 ·
Re: Your QMX output experiences @12volts...?..and by the way, what an amazing radio.
Thank you for your response. You suggested something like a "tune" mode that reduces power to 25 percent. Can the radio be operated in that mode? Is the power reduction continuously variable? I will
By Bill Cromwell · #137107 ·
Re: Shack Clock build
I did put black momentary button switches just under the pipe below the display. They look good as is, but I may try to retro design them somehow. -- 73, Dan - W2DLC
By Daniel Conklin · #137106 ·