QMX+ has no DIP switches. Check QMX documentation for microphone application.
To Whom It May Concern,
When will SSB be ready???That was another endless topic. It's now put on clothes.?
Just curious is there room for DIP switches to juggle a microphone connection?? (I went through this concept with another branded kit when I first started.?Turned out that one already matched my desire.)?
Could it be on the QMX+ developer board?
73s Paul KY4XJ.
On Wednesday, March 26th, 2025 at 01:25, Paul - AI7JR via <paul.hanchett= gmail.com@groups.io> wrote:
Just updated my QMX+ to 01_01_003 Beta. Plugged a modified Baofeng mic into the front panel and tried running the microphone test. It doesn't seem to work.
?
I can tap on the front panel, and that seems to get a bit of a response, but the mic is dead. Also, in USB/LSB mode, PTT doesn't switch to transmit. Hardware diagnostics indicate that the mic's PTT switch is working. Can see that the diagnostic notices the mic's FET...
?
Unplugged and powered the mic from 10V through a 2K resistor. I can see audio with my scope, so that looks like it's working.
?
Is there a setting I need to change, for the external mic to work?
?
TIA!
Paul -- AI7JR
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
On Wed, Mar 26, 2025 at 08:35 AM, Petrov Sergey wrote:
not all will be ready to learn how to work with Terminal program
Sergey, the terminal interface is very easy to use.? I encourage you to try it.? If you need some help, send me a message and I'll walk you through getting it set up.? Most here use puTTY, and its setup interface can be intimidating, and is definitely non-intuitive (I have used it for years).? Instead, for QMX I use TeraTerm, which is much more friendly.? Or the old Windows Hyperterm is also easy.? ?After a one-time setup to select the serial port, all it takes is plugging in a USB cable, opening the terminal app, and hitting the enter key.
Stan KC7XE?
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Re: mic test doesn't scroll up
Another thing to check is that you are in vt100 emulation mode, and the screen size is 80x24 so it will scroll correctly. I think securecrt is way overkill for connecting to a local serial port, so you may want to try something simpler if you keep having trouble.?
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Or may the contacts should be activated for TX by default? 5V on the ring and ground on the tip during TX.
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Hello Hans! Is it possible to add activation of PTT output contacts (5V on the ring during TX and so on) to QMX standard menu (not threw Terminal program)? I think it makes sense because almost all sooner or later will want to try PA with QMX, but not all will be ready to learn how to work with Terminal program just for this simple procedure )
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Re: mic test doesn't scroll up
Hmm...? I'm using securecrt. The window isn't "slightly out of shape". screen does do funky things sometimes to the console (when I use it for other applications). I'll research that and see if it offers any clues. Thanks for the tip.
?
I have some key mappings also. Must have picked them up from a copy of the session config. I'll mess with this also.?
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Main menu -> Configuration -> Band configuration and then go in and change band settings as needed. Section 8.5 starting on page 78 in the QMX manual describes in more detail, but only shows via the terminal interface. The pinot for the 3.5 mm connector is important.
?
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Re: Debugging BS170-related issues
And to clarify, this is a Rev 3 QMX.
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Debugging BS170-related issues
One of my BS170's fried yesterday, and I am replacing all 4 of them.
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Using the excellent info at /g/QRPLabs/wiki/37486 , I am trying to determine if other components were damaged. I have removed all of the BS170's , and looked at the signal coming out of IC503. The voltage levels are okay, but it's neither a clean sine wave or square wave. Is that okay ? ?
Thanks and 73,
Steve, N2IC
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
I do not have Terminal program (( Is it possible to do this threw QMX menu??
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On Wed, Mar 26, 2025 at 08:52 AM, xyroto wrote:
Just curious is there room for DIP switches to juggle a microphone connection?
I just fabricated a male-female 3.5mm stereo crossover cable to adapt my existing mics to the radio, leaves everything unmolested.??
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I often use zero Ohm chip resistors for PCB "switches"; while less convenient to change position, they take a lot less room than an DIP switch or header pins/shunt arrangement.
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You might also consider cutting and jumpering your radio to suit your mics for a permanent, 'zero mass" fix.
73, Don N2VGU
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
There was a screenshot above that shows it, I will repost it here. You need to enable it on each band you plan to use.?
?
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On
3/24/25 I had a CW practice / rag chew session on 20 meters.
I worked three stations:
| Date
/ Time |
Call |
Bnd |
Frequency |
Mode |
Power |
Rec |
Snt |
SPC# |
Name |
Comments |
Off |
| 3/24/2025
19:25 |
AE4IX |
20 |
14.054 |
CW |
100 |
599 |
559 |
VA |
Rick |
K3
at 100 watts 100 ft sloper doublet |
19:43 |
| 3/24/2025
19:11 |
K4WNY |
20 |
14.054 |
CW |
100 |
589 |
599 |
TN |
Ron |
K3
at 100 watts 100 ft sloper doublet |
19:24 |
| 3/24/2025
19:08 |
K6GRD |
20 |
14.043 |
CW |
100 |
569 |
449 |
UT |
Rick |
K3
at 100 watts 100 ft sloper doublet |
|
Conditions were OK with
QSB on all stations but better than it was on Sunday. SSN =
110, SFI = 168, A = 10, K = 3.
My next CW practice session will be?March 28
at 09:00 EDT / 13:00 UTC on 20 meters.?Anyone and
everyone is welcome. This practice is intended for
operators who are new to CW or they need some practice. IT
DOES NOT MATTER HOW POOR YOUR CW IS. Mistakes are OK. Poor
fists are OK. Slow speed is OK. Really slow speed is OK.
This practice is meant for you to improve your CW. I will
do my best to adjust to your skill level. Operate at any
power level. If several stations show up, I will operate
as a round-table control station. I will do it as a
round-table so everyone gets a chance to transmit. Please
listen to my directions.
Details:
Date -
March 28 2025
Time - 09:00 EDT ?13:00 UTC
Band - 20 Meters
How to find me - I will find a clear frequency and call
CQ. Go to the Reverse Beacon Network and search for my
call sign AB8DF.
That will tell you
what frequency I am on. Tune your station to that
frequency and if you hear me give me a call. If there is a
QSO in progress, please wait for a break in the action.
Then send your callsign. If I hear you, I will invite you
to join the QSO and start a round-table QSO.
Reply to this email if you have questions.
IT DOES NOT MATTER HOW POOR CW IS
Ed
AB8DF_._,_._,_
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Re: Updated Wiki Page: QMX QMX_plus SSB settings
#wiki-notice
Thanks for doing this Ludwig.
?
One suggested addition. Could you add a section at the end with the Default settings. Sometimes starting over with a clean slate is a needed option.
--
73, Rick
VE7TK
Website:
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Thank you Jim! Were exactly in menu can I enable "key to ground"?
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I believe this is a question specifically for Hans :)
?
Having recently had the receiver mux chips be destroyed seemingly without any other failure of the switching circuit controlled by Q508, I'm wondering if there is a potential race condition such that the transmitter "switch on" code may be reachable without the receive switch pin on the microcontroller being pulled low.
?
I assume that transmit is almost certainly gated behind a command changing that pin state, but I'm wondering if there's a machine code level race condition that would let the transmitter operate without that pin being guaranteed pulled low?
?
Just a thought, as this seems like a strange failure mode.
?
Greg
N1TR?
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Interesting observations on this thread.
?
Despite being CW only I am also an inveterate fiddler? ( it is ain't broke you're not experimenting hard enough :- ).
I loaded each of the recent software loads (from Linux desktop ) and all but one went well except for one which required shorting pad 2 to ground to forces dead device back to DFU mode and then reload.
?
After a calibration ( don't do this late at night when you are due to go to bed as it takes a while !! :-) ) I had dreadful distorted audio.? Thinking it was perhaps an issue with me driving from an external source ( USB), I found a near on 40-year-old electret I used to have as a neck harness for mobile 2M FM in the early 80s and wired it to a 3.5mm terminal break out ( see below - these are great for quick patching speakers/mikes/keys / ptt siwtches ).? I did test the electret first in a PC sound card and it sounded great.
Still with terrible distortion, I switched off the phase and amplitude predistort and the sound was then fine.? ?I was wondering if this was owing to calibration done on v...2 and now on v...3 ( seem to remember this is written to EEPROM so this should not be an issue). I re-ran the calibration and the audio is now fine.
?
73 Simon
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FTAOD seems to be a legalese thing, had to look it up.
Took me some time to find that on the web.
A slight misspelling on my part brought up lots of very cute images of amphibians, which distracted me from my initial purpose.
?
Perhaps it is best understood by reading it in proper context, as written by a professional.
Here's an example of how it should be used, from ?
?
"For the avoidance of doubt, this paragraph is intended to, shall be??to and,??does?avoid any and all doubt??provided that it shall not be deemed to, and shall accordingly not, amend, alter or affect the foregoing passage, which passage does not, for the avoidance of doubt and notwithstanding this present clarification as it may,??be amended updated or clarified, introduce any doubt, (other than, for the avoidance of doubt, those previously-identified doubts as may have been conclusively eliminated by the doubt-avoiding effect of this present clarification)."
?
TLDR:? FTAOD="To be clear,"
?
Jerry, KE7ER
?
?
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On Wed, Mar 26, 2025 at 01:57 AM, Chris wrote:
I've just started building my QMX+ kit and what I found was that I needed an indicated temperature of 440C to burn the enamel off. My normal 380C barely touched it.? I'm using a WEP 926 LED soldering station.? I'd like to use a little less and will be experimenting as the toroid saga continues.
?
FTAOD this is with the 0.33mm wire supplied in the kit.
?
HTH
?
Chris, G5CTH
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Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Hello Sergey,
?
My QMX+ seems to have neither issue you are reporting. I am driving a Juma PA 100D clone successfully with SWR protection enabled. To key the amp I had to go into the menu to enable the key to ground feature in the band settings.?
?
73,
Jim AC9YY
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Re: QMX+ Initial Power Up Display Shows Only Boxes
Hi Dean -
?
Glad to hear you were able to get yours on the air!
--
73,
Don K0DBL
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Donald S Brant Jr
Rick Williams - VE7TK
Si Smith