开云体育

I just finished my QMX this morning. Inspected the boards and solder joints. Loaded the FW#14 all went well until I restarted the QMX. The display had miscellaneous numbers etc. I posted on the FB site the pin for the display board were questioned so I resoldered these pins and all headers and pins. I still have the same issue. All the buttons and switches work as they should. I try to post pictures for example. I have deleted and reload FW#14 twice no change.?

Any help would be appreciated.

Larry NA0F ??

Here is a screenshot of proper Radio config…

Thanks Alan,

thats what I went with, the QDX and case have been ordered. Its familiar, in stock, and ships without delay.

Ron a few callsigns since 1970

On Sun, 4 Feb 2024 20:00:38 +0000
"Alan G4ZFQ" <alan4alan@...> wrote:

On 04/02/2024 18:57, Ron VE8RT wrote:

I did not see a receiver/decoder option, not yet,

Ron,

I'd say the QDX with WSJT-X/ Rpi. Build for 12 volts, run at 9 volts or
less.

73 Alan G4ZFQ

--
Ron VE8RT <ve8rt@...>

Just been having another play but actually on air this time and it just reinforces how much better the keyer is.? Very few bad dits or dahs and it is mainly truncated dahs and mainly the first dah in a sequence but even then it is more usable.??

Get the clunking sorted and I think it'll be a very high performing /p /qrp rig indeed :)?

Same issue for me with the QLG2 most of the time. I did have one successful transmission, followed by many unsuccessful transmissions. I changed to a different GPS and on the first try it worked.
this is the GPS that I tried as an alternative:?

KF7HYO

I'm trying to connect my QMX to a Raspberry Pi Zero 2W. ?I have the official Raspberry Pi OTG usb micro B to USB A lead ?
I'm then plugging in a USB A to USB C lead that works find when used on my Mac to connect to the QMX. ?However, for some reason I cannot see device on the Raspberry Pi. ?If I replace the QMX with a QDX and used a USB A to USB B plugged into the same OTG lead, then it all works.?

Can someone help tell me what I am missing here please!

73
Paul
M1CNK

Here are three screen shots. I am using Kenwood TS-440S (don't have TS-440 in drop down). I see the QMX transceiver in audio input and output dropdown and am using them. And all is see in the main screen of WSJT are solid green lines. Headphones in QMX audio output ?lets me hear FT8 sounds. If I press TUNE in WSJT, I get current draw of about 580ma, and the QMX has a solid line, indicating according to the manual that all is good.

Thanks for your thoughts.

Phil K3UT

On Fri, Feb 2, 2024 at 07:20 AM, Matt - HB9HWI wrote:

(with USB-C PD trigger board to get 12 V out, works like a charm)

Hello
there was a posting in this group warning from using a USB-C PD Decoy with the QMX because of possible damage due to the voltage ramp accomplished by the PD Decoy during startup. I include a copy & paste of the message I mean. 73 de dl2arl

Thanks Alan,

its something I'm familiar with as its what I'm using for my 60M
beacon. Its been running 24/7 on 12V without a glitch, but lower
voltage operation will be less stress on me :-) when its installed in a
distant hamshack.

Ron ... callsigns go here ... :-)

On Sun, 4 Feb 2024 20:00:38 +0000
"Alan G4ZFQ" <alan4alan@...> wrote:

On 04/02/2024 18:57, Ron VE8RT wrote:

I did not see a receiver/decoder option, not yet,

Ron,

I'd say the QDX with WSJT-X/ Rpi. Build for 12 volts, run at 9 volts or
less.

73 Alan G4ZFQ

--
Ron VE8RT <ve8rt@...>

On 04/02/2024 18:57, Ron VE8RT wrote:

I did not see a receiver/decoder option, not yet,

Ron,

I'd say the QDX with WSJT-X/ Rpi. Build for 12 volts, run at 9 volts or less.

73 Alan G4ZFQ

Thank you Andy,

this is very interesting as it is a solution to another project I
wanted to do, remote VHF and UHF beacons for antenna evaluation.

As I'm very very stretched thin wrt to time (other commitments
related to amateur radio) plus the challenges of getting parts and
materials here I would have to rely heavily on the support community to
get this working in short order.

I did not see a receiver/decoder option, not yet, after a cursory
look at the RFZero website.

This should work with the QRP labs 5W amplifier and LP filters I
hope.

Ron .... no need to re-list the callsigns :-)

On Sun, 04 Feb 2024 10:28:01 -0800
"M0RON" <eustace.andy@...> wrote:

Also don't forget the rfzero, just add a 1w amp.
I have used both a U3s and the rfzero and the latter unit is definitely better.
Andy.
--
The universe is made up of Protons, Neutrons, Electrons but contains only one M0RON.

--
Ron VE8RT <ve8rt@...>

The inability to send CW after checking the SWR is a known bug and is on Hans’ list to address. I discovered the same thing and reported it several weeks ago (before my QMX decided to refuse powering up… but that’s another issue).

Simply go into the menu again and back out and your ability to TX should be restored.
--
Kevin Culp, KZ3L
Warren County OH
Grid Square EM79

Also don't forget the rfzero, just add a 1w amp.
I have used both a U3s and the rfzero and the latter unit is definitely better.
Andy.
--
The universe is made up of Protons, Neutrons, Electrons but contains only one M0RON.

I have the U3S, QCX+ (40M), and a QDX (currently the WSPR beacon on
60M for VE8TEA). And their are other makes and models of WSPR
beacons. Likely at my own expense I'm looking set up a couple of
amateurs in VE8 (and maybe FP) with 60M WSPR beacons (TX only, XCV with
an internet connection where possible).

As an experienced builder kit form is acceptable and likely cheaper.

What model, or model plus SBC such as the Raspberry Pi series, is
recommended for this use?

Ron VE8RT VE8TEA FP5EK

--
Ron VE8RT <ve8rt@...>

On 04/02/2024 15:15, wb2cba@... wrote:

Those swapped Drain Source BS170s might be 2N7000 rebranded with chinese seller as BS170.

Barb

I had wondered that.

I wonder if there is a rumour going round?
On Ebay I see "BS170-D27Z N Channel MOSFET onsemi UK Seller" He says "These are not to be confused with the many similar devices with transposed drain and source connections."

Maybe using the misprint of the Onsemi data sheet to spread the rumours and sell them expensively? ?1.70 each.

73 Alan G4ZFQ

I have some BS170s presently purchased from a Chinese supplier. Clearly marked BS170. Having read this thread I decided to check. The pinout is S G D.?
Thanks for the heads up on this one.

Hi Bryan,

the common mode current issue was also on my mind, but on the other hand I really wanted to connect the antenna directly to the QMX to make everything as compact as possible. I may go out for another activation next week and will disable SWR protection after tuning the antenna. In case everything works fine, I'll probably live with it "as is". I'll let you know how it went.....

Best,
Matt?

Thats cool.
yesterday someone posted a Qrpbuilder vertical antenna like that for 40&20. So I grabbed my junk box and built one like it just for 20m. I used wire for the element but it works hanging from a limb. one thing they mentioned was the use of a snap on 31 material ferrite with 5 turns of feed line to choke off? common mode currents.

I wondered if you had any issues with that connecting directly to the QMX and maybe thats why your swr protection was acting out.
--
regards,
Bryan, N0LUF

There are ready made usb-pd to 12Vdc cables available on aliexpress for just a single-digit dollars, shipping incl. I guess I'll give it a try. And yes, the pd capable power bank is needed for that.
Anyway, I'm still thinking of that dc-dc for a cheap power bank - I've got plenty of those made of single 18650 cell (many companies used to give them away as their promo stuff) and since they are about 2Ah of juice - it's not bad for QMX.

Hi Matt,

the trigger board is bought (~10 USD if I remember right) and I use this one:

Just check Google/Amazon for ZY12PDN, I'm sure you will find something. But please remember, you will need a Powerbank that supports the Power Delivery (PD) protocol and the output voltage/power you need. PD options are 5V-9V-12V-15V-20V, 3-5 Amps, but not all powerbanks can do this.

Another word of warning: Not all powerbanks provide a "clean" output. I have one powerbank with no issues at all, but another one introduces pretty noticable noise. To work around the isssue, I added some capacitors and a choke at the output of the trigger board (FYI: the choke had actually no effect, the capacitors did the job). In the end, it looks like this:



Hope this helps,
Matt