Re: #qmx #SSB Firmware beta 1_01_001 release #ssb #qmx

On Wed, Mar 19, 2025 at 10:38 PM, Glenn S wrote:

built in USB sound interface

I don't have attenuators handy and ready, so I disconnected the antenna from my IC-7300 and let it pick up that way.? Might try again through a dummy load, but needless to say, there are issues on 20m for me too.? I have attached my recording.? 17m first, 20m second.

17m_20M.mp3

Re: Available Hand Mics for QMX SSB ?

#141207

Thank you Eric, and thank you Adam! My housing is printed and I await the fiddly bits!

Re: Available Hand Mics for QMX SSB ?

#141206

I made a simple adapter that crosses tip and ring from a jack and a short length of cord and plug so that I can use any several mics I already have.

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? 73
??? KD8CGH

Re: Available Hand Mics for QMX SSB ?

#141205

I have had a really good response to this offer to kit together the mics, and with Adam's approval ('cuz it's his mic design) I have ordered more parts so the limit of 9 has as of now been removed. If you want me to kit one for you for $10 or build it for you for $15, I can do so. The only thing is, we have to wait 45 minutes per case for the printer to make them, so don't expect me to ship overnight. It will likely be Monday now before the new parts get here and I can ship more than the original 9.

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Erik

Re: #qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

#141204

Stan,

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I noticed that while calibrating my QMX+, I had a amplified speaker plugged into it while calibrating, some were only a single tone and some were two tone. Don't know what it all means.

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Joel

N6ALT

Re: Available Hand Mics for QMX SSB ?

#141203

I ran out of PINK!! Maybe glow in the dark green... :P

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Erik

Re: #qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

#141202

I installed Firmware beta 1_01_002 on my high band QMX. In putty I started Optimization and after less then a minute putty became unresponsive. I exited putty and disconnected power from the QMX. I powered up the QMX and it stopped with the message "Initializing Audio System" then it shut down. Any thoughts on what I broke?

Re: #qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

#141201

Chris,

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I built it for 12V, so that's what I calibrated it at per Hans advice. It seems low in power now, I think the highest power I'm getting is about 1.5 watts, I was getting about 3 watts before. I'm tired, I will revisit it tomorrow.

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Joel

N6ALT

Re: Available Hand Mics for QMX SSB ?

#141200

Erik

I just sent money for a microphone. Please pick out a very macho color for me. Address is good in the PayPal or on QRZ.

Bill

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On Mar 20, 2025, at 2:11?PM, Erik Larson via groups.io <kd7ykq@...> wrote:

AD7OV

Re: #qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

#141199

Well, I finally got it calibrated, not sure what all the numbers meant but it's done.

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Joel

N6ALT

Re: #qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

#141198

On Thu, Mar 20, 2025 at 12:09 PM, Joel Caulkins/N6ALT wrote:

Should it be this difficult to calibrate?

I've done two calibrations and both ran to completion.

I was running at less than full power, 10V on a 12V QMX.

What voltage were you using?? Did you have a dummy load that gives close to 1:1 SWR?

Would you be happy to drive it at full power on every band?

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AIUI the calibration process will run the QMX up to full power at least, maybe to 11 - and do this on every band.

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Chris, G5CTH

Re: Available Hand Mics for QMX SSB ?

#141197

Qrpguys has a kit that should work. I ordered one to try it out.

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Dennis

KK5DB

Re: Available Hand Mics for QMX SSB ?

#141196

Thank you, Erik and Adam both. ?Ordered one and look forward to adding it to my QMX go-kit!

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-Franz N3HFS

Re: Available Hand Mics for QMX SSB ?

#141195

Thanks Adam. I'm just trying to make it easy for more people to enjoy the SSB upgrade.. And you made a great little mic case.

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Erik

Re: Using a PC Gaming headset with mic for phone SSB operation

#141194

Hey Chris,

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That is exactly what I'm thinking.? I think, that should work nicely.?

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Thanks for posting the diagram.

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Cheers.

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Mel. M0KMD.

Re: Available Hand Mics for QMX SSB ?

#141193

You want the version for the (tr)uSDK and uSDX (if you download this now, it will also list the QMX which makes it much easier to pick the correct one).?

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--

Karl Heinz - K5KHK

Re: #qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

#141192

I am running USB IMD Sync optimization on another QMX - this time I had my headphones plugged in.

While it is running the optimization, on some bands I hear the two-tone IMD signal, but on most bands I only hear one tone.

Is this expected?? Or perhaps the reason some of us are getting strange optimization results?

Stan KC7XE-

Re: #qmx #SSB Firmware beta 1_01_002 release #qmx #ssb

#141191

Hans,

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I started the calibration process on the original beta .000, about half way through it popped one of the finals and crowbarred my power supply. I changed all 4 mosfets and updated to .002. About a hour ago I started calibration #2, about half way through is said it lost communication with the radio and I had to reset everything. I’m now trying attempt #3 to calibrate. Should it be this difficult to calibrate?

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Joel

N6ALT

Re: #QMX 60-15 initial power output #qmx

#141190

I built a 9V midband QMX, basically everything works fine and all hardware tests are good, and I used it already for some SOTA activations.

Now I want to tweak it a little, as the power output is good on most bands, just on 15m it could be better. My power outputs are as follows:

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60m : 5.6W

40m: 5.1W

30m: 5.4W

20m: 4.9W

17m: was 4W, now 4.6W

15m: was 3.5W, now 3.7W

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I set the power supply to 9.2/9.3 during rx, then the QMX shows 8.9 - 9.0V during tx.

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Initially 17m was 4.0W and 15m was 3.5W. I played around with the spacing of L510 and 513, but everything I tried did't change much. Then I removed one turn of L513, and 17m improved to 4.6 and 15m to 3.7W. The drop in the LPF sweep moved slightly to the right.

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How did you change the spacing to improve the Output power? Can someone show images of their successful tuning?

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I know that 3.7 to 5W won't be much of a difference on the band, but I would like to get out as much as possible. Especially if others have 5+W on 15m, it should be possible.

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Tks es vy 73 de Robert OE3RLV

Re: Available Hand Mics for QMX SSB ?

#141189

开云体育

Spanks.

73

-- Matt N3AR

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On Mar 20, 2025, at 11:52?AM, Daniel Conklin via groups.io <danconklin2@...> wrote:

Matt, from the beta firmware download page:

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Microphone Connection:
The microphone is plugged into the QMX Paddle port; this stereo 3.5mm jack plug is for both the microphone signal AND the PTT switch.?

Ring-to-ground is the microphone connection

Tip-to-ground is for PTT (close the connection tip-to-ground to initiate transmiussion)

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73, Dan - W2DLC