Yes, the QMX kit has a microphone.?
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Update!
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I¡¯m extremely thankful for the fast assistance to help me hone in on the issue. Hit the T507 with a strong dose of heat and I believe I may have resolved it!
I think I was so caught up in making sure the LPFs had continuity that I failed to check T507.
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Going to check again after work.
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Re: #qmx #ssb CESSB update (Controlled Envelope SSB)
#qmx
#ssb
Yes, there are drawbacks to a trade secret. Employees who know the trade secret and leave the company could use it at a competing employer assuming they¡¯re willing to risk a lawsuit. In Hans¡¯s case, he¡¯s the sole software developer and his software is encrypted so any unauthorized clone of his hardware is essentially useless without the software. Cloners are looking for an EASY way to steal another¡¯s work. They won¡¯t put in the extraordinary effort required to start a new software development effort from scratch, especially at the price point of QRP Labs products.
On Thu, Oct 17, 2024 at 7:29?AM sp9paz via <pawel.zielinsky= [email protected]> wrote: On Thu, Oct 17, 2024 at 07:14 AM, Pawe? H wrote:
Coca-Cola recipe is not patented. It is not because if patented it must be published. So it is easier to keep it in secret than fight with copies.
There is a drawback. If by some lucy coincidence you come up with the same receipe, you will be free to produce your own drink, under your own brand, thah will be tasting like the coke. And since nobody published it before, you will be able to successfully claim for patent. And if granted, you will be able to force Coca-Cola to stop their production as it violates your rights.
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indeed, follow the PCB wiring and check the continuity there, this is how I found the JP501 problem
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On the QMX there is the T507 transformer which is I believe for SWR, not sure if it's the same on the QMX+ but I would check the solder joints on those and test continuity.?
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Chris,
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For what it is worth, I've put images of my QRP labs experiments under photos in this groups.io. Jumper JP501 also tricked my once. Also the jumpers below the GPS receiver are tricky, and I nearly killed the LCD display and push buttons by soldering them on the wrong side. In the end everything does work.?
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73 PA1EJO Ernst
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Just a quick comment. The BNC WILL show as shorted with a multimeter since the meter is DC.?
( I learned that after cutting one of mine out before even first powering up. Jury rigged a BNCish dongle while waiting for an exact replacement from Turkey.? DOH! )
GREG KI4NVX?
On Thu, Oct 17, 2024 at 10:26 AM, Chris - 7 Land <christopher.j.richins@...> wrote: Thank you all for the feedback.?
-Into a dummy load
-SWR seems to get incrementally worse from 10m, and then it falls off bad?
- Haven¡¯t got it running good enough to use with antenna
-Jumper installed at JP501
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I¡¯ll take a closer look at T507 and D514/D515 today, check the BNC for shorts and report back
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Re: Tuning error - 60m band
Thanks for your help.
Krzysztof
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Re: Tuning error - 60m band
Set "Band limits" to "None". P.51 of the operation manual v.26 refers.
gl de va3rr
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Thank you all for the feedback.?
-Into a dummy load
-SWR seems to get incrementally worse from 10m, and then it falls off bad?
- Haven¡¯t got it running good enough to use with antenna
-Jumper installed at JP501
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I¡¯ll take a closer look at T507 and D514/D515 today, check the BNC for shorts and report back
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Hi, I have a problem with precise tuning in the 60m band - how to fix it?
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Krzysztof, SQ9GIN
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Is the jumper installed between the two center pads of JP501?
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Al, K2ZN
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Does the QMX come with a microphone on Rev.4 or is that user supplied? I see the space on the board. My QMX+ has it supplied but I would like a QMX for a handheld on 10 and 15 . That would be really cool.
I love little gimmicks!?
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Re: Congratulations, Hans
Congratulations Hans!
May there be many more replies here.? Because you truly deserved this award.
73
On Tuesday, October 15th, 2024 at 21:35, Daniel Conklin via groups.io <danconklin2@...> wrote:
Congratulations Hans!
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73, Dan - W2DLC
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Re: Congratulations, Hans
Congratulations to you Hans!
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Hi All,
In anticipation of the eminent release of SSB by our resident C expert on the QMX, has anyone got a good design/circuit that we can all start working/building on for a PTT microphone, using the Mic port on the Qmx.? Don't say use the build-in mic, I am more thinking of a traditional PTT mic, but something we can build and not just go buy.
73
ZR6TM
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Re: #qmx #ssb CESSB update (Controlled Envelope SSB)
#qmx
#ssb
On Thu, Oct 17, 2024 at 07:14 AM, Pawe? H wrote:
Coca-Cola recipe is not patented. It is not because if patented it must be published. So it is easier to keep it in secret than fight with copies.
There is a drawback. If by some lucy coincidence you come up with the same receipe, you will be free to produce your own drink, under your own brand, thah will be tasting like the coke. And since nobody published it before, you will be able to successfully claim for patent. And if granted, you will be able to force Coca-Cola to stop their production as it violates your rights.
?
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Hi Sandy, I¡¯m in the same boat. I¡¯ve got dozens of earbuds, IEMs, phone buds, space buds you name it. Sony, Etymotic, CCrane, Panasonic, JBL, Radio Shack, Apple (with the 3.5mm plug), Bose, and I keep coming back to using my dollar store ear buds! They are $1 (actually now $1.25 due to 25% inflation) with a frequency response to match, perfect for CW notes in the 400-800Hz region sounding really sweet for Morse and not much else. My only complaint is that they are not very rugged and many fall apart after a few uses BUT, if you superglue them back together, I¡¯ve got one pair going on 4 years now.?
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On Oct 17, 2024, at 5:20?AM, Sandy via groups.io <mac3iii@...> wrote:
? I haven't seen much posted about this subject so I thought I might save someone some time and money. After trying many varieties of ear bud headphones these have worked the best for me for use in the QMX:?
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They have the highest quality sound, more than sufficient volume and best price for value I have found. They also work very well in my android cell phone. Other brands either fall out of my ears, aren't loud enough or sound too tinny or buzzy. I now use these on all my QMX/QCX QRPLabs products. I will be interested to hear other peoples' choices and preferences. Sandy KB3EOF
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Do you have a licence to operate this equipment ?
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Re: Congratulations, Hans
Hans, you are the very definition of innovator.? Well deserved!
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Cheers,
Chuck
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Joe AI5DD
va3rr
Al Scanandoah
Chuck ke9uw
WV0H