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

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)

--

73, Dan - W2DLC

Re: Available Hand Mics for QMX SSB ?

#141188

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)

--

73, Dan - W2DLC

Re: Available Hand Mics for QMX SSB ?

#141187

开云体育

Adam has a few different wiring configurations listed for the mic; which one has been found to work with the QMX?

Thanks.

73

-- Matt N3AR

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On Mar 20, 2025, at 11:10?AM, Erik Larson via groups.io <kd7ykq@...> wrote:

I just made one of these for my QMX+:

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I have the parts on hand to make 9 more if anyone is interested. You will need to provide your own cord.

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I have PLA on hand to make the case in Black, White, Matte navy blue, Light green, purple, tan, orange, or brown.

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I can provide the parts (3D printed PLA case, MIC element, pushbutton switch, and 3.5mm TRS jack) as a kit for $10, or fully assembled for $15 anywhere in USA.

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My email is good on QRZ if you are interested

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AD7OV

Re: Did I make an unfixable mistake? #QMXplus

#141186

I started using ChipQuik brand liquid flux for rework? and have been very happy with it.?

I had been using up an older supply of Radio Shack brand solder wick and it performed better with a drop or two of the flux on the wick prior to wicking the joint.?

Ran out of the RS wick. Ordered some ChipQuik brand solder wick in their 2mm width. Found it worked great without any extra flux. Place the wick on the joint, apply a somewhat warm iron (400C) raise the spool side of the wick a bit and the solder is absorbed right off the joint. Even was able to clear through holes if I flowed a little fresh solder in just before wicking.?

Great stuff?

GREG KI4NVX?

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On Thu, Mar 20, 2025 at 1:14 PM, avinoam83 via groups.io
<avinoam83@...> wrote:

Thanks! I went out and bought a syringe with flux paste, but it's very hard to dispense and apply it. What you have seems a lot better.

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On Thu, Mar 20, 2025 at 02:31 AM, N4REE - Bob wrote:

Stan seems the first to mention the magic word: FLUX.?

A drop of flux before applying the iron does magic in transferring heat and solder. has helped me immensely. Looks expensive, but likely a lifetime supply (esp at my age).

--

72 de N4REE, Bob Easton - QRP CW forever

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

#141185

I’m not brave enough to download the SSB software yet, but would like to say how much I am enjoying reading posts of the group experiences and community debugging of the releases.  

And it is so nice not to read anymore the posts that say  “Hans, when is the SSB coming?”

Phil K3UT

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

#141184

On Thu, Mar 20, 2025 at 11:12 AM, Dave Bottom wrote:

Hans,

It is looking very good SSB on the QMX+.??

How do you configure the PTT Out to go LOW to key a conventional linear amplifier?? At 5W it should drive my RFKIT RF2K-S to 200W on the standard attenuated input but it doesn't want to key the Linear.

Dave WI6R

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Dave,

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Make sure that in the band configuration menu that you have PTT Grounded ENABLED if your amplifier needs a pulled down PTT signal.? Default is a +5V output upon transmit.? ?PTT output is on the TIP of PTT jack.

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Brien

Re: Available Hand Mics for QMX SSB ?

#141183

While my license does not allow for "commercial" sales, I can clearly see that this is not a money making venture and is instead simply a favor to other hams. Consider this approval to proceed. ?

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Adam

K6ARK?

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

#141182

Hans,

It is looking very good SSB on the QMX+.??

How do you configure the PTT Out to go LOW to key a conventional linear amplifier?? At 5W it should drive my RFKIT RF2K-S to 200W on the standard attenuated input but it doesn't want to key the Linear.

Dave WI6R