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Re: 60m Band tuning is broken, or not?

 

I can see why it might be defaulting to the channelized scheme; In the US we are not allowed to VFO across that band and must stick to channelization since we are secondary users on what is primarily a government allocation for us.
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There have been a couple of attempts for US hams to petition to change for more channels and/or VFO operations but that but it is complicated because amateur radio in the US is regulated by the FCC but government operations is regulated by NTIA (National Telecommunications Information Administration) and the two agencies do not play well with each other.
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Much of the rest of the world has a much more 'relaxed' view of the 60 meter band.
--
73, AA4HA
Re: QMX Power on/off loud pop

 

"We have eyes everywhere....."
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Reminds me of that sports betting commercial:
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"We are everywhere, we see everything."
Re: #QMX Glitchy encoders? Not any more ? #qmx

 

On Sun, Aug 4, 2024 at 07:46 AM, Manfred DL9XX wrote:
But I'm surprised that this standard measure isn't included in the original design.
The software seems to handle most things well so I suspect it's not really an issue until the encoders start to age a bit
Re: Intermittent QDX transmit failure on one band

 

On Sat, Jul 13, 2024 at 10:51 AM, John Z wrote:
With focus on the 20m LPF, I suggest checking the inductor leads first. A poor joint that is the result of inadequate enamel removal can wreak havoc.
Well, it was hard to confirm visually, and I was unable to recreate the fault on the bench, but this may have been the source of trouble. I removed the solder from the 20m hand-wound inductor leads, gently scraped at the enamel with an X-acto knife blade, and then resoldered each one. (I did one lead at a time this way, so the inductors would not fall off the board!)

A follow-up SOTA activation was successful on 20m, so crossing fingers that it's now fixed. Until I test it in colder weather I won't be sure however.
Re: #missing #qmx Q301 #missing #qmx

 

I simply looked at the schematic and Q301 is a BSS123.? I would replace with the same.
Re: 50W power amplifier initial power up.

 

21V is within acceptable starting value.? ? Also it will drp soon enough
in use to be under 20.
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--
Allison
------------------
Post online only,?
direct email will go to a bit bucket.
Re: 50W power amplifier initial power up.

 

Hi Guys
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Thank you for the data.
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The two replies are close enough to provide sensible guidance.
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I am going to use a repurposed lipo tool battery. Ie 21 V fresh off the charger and 18.5 V for most of the discharge cycle.
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I will use a couple of diodes in series between 21V and 20V to burn off the excess.
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I will set the bias for 20 V.?
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BR
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Chris
Re: #missing #qmx Q301 #missing #qmx

 

I think if you just short source to drain (or LCD pin 16 to ground you will turn on the LCD)? If you don't expect to want to turn off the LCD then you don't need to replace Q301.
#missing #qmx Q301 #missing #qmx

 

All, I posted a while back when I finished my mid band ver 4 qmx that my backlight was not working and assumed it wouldn't really bother me. After using it for a while now it would be nice to have the backlight since most of my radio time is in low light.
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So can anyone tell me what the specs are for Q301 on the display board, above the right corner of the lcd. Mine was knocked off during shipment I assume and I would like to try to replace it with something to see if I can get my backlight working. Thanks.
Re: VDD to Ground - before I start again

 

Oops - this is a QMX+ main board ...
VDD to Ground - before I start again

 

I'm just starting build 2 having failed first time round.
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I've just got a main board out of the wrapper and measure 916R between VDD and 0V - I was expecting 9-10K.
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Anyone else know what I should expect?
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Mark
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Re: QMX Power on/off loud pop

 

This is the innovation that I'm here for.? Hans, you are a treasure.

73

-- Matt N3AR


On Sat, Aug 3, 2024 at 11:45?PM Hans Summers via <hans.summers=[email protected]> wrote:

Hi Dave

Mmmmm, think you can add a sensor that warns me when the wife is heading for the?
shack with her to do list?

Not currently, unfortunately. But I think the best way to do this would be wait for when the BASIC scripting language is implemented. Then install a hidden PIR sensor somewhere on the XYL's route to your shack, connected to one of the GPIO pins in the QMX/QMX+. On activation it should cause a short "XYL Warning" to be sent to your earphones in CW. If the PIR sensor is strategically placed at a sufficient distance from your shack, it should give you enough warning time to be able to hide before she reaches the shack.

73 Hans G0UPL
Re: #QMX Glitchy encoders? Not any more ? #qmx

 

Thanks, Roman. My QMXs suffer from the same issue. Looks like an easy fix.?
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73, Mike KK7ER?
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Re: QMX+ debug

 

After a great deal of searching I think I have a conclusion - albeit something I can't rectify.
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Fault was 0.8R between VDD and 0V. Never tested until construction was complete but have to assume this was not the case on leaving the factory.
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Every component between VDD and ground checked and double checked - no joy.
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As a last resort, and after much heat from the rework station (on 420deg and max airflow) and much chipquik flux the STM32 MCU has been lifted off the board and the short has gone - VDD to 0V now measures ~9k.
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I have no hope of getting a replacement fitted so the board is now scrap.
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I'd love to know what people think went wrong, feeling somewhat disappointed ?.
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Mark
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Re: FS QLG3 New In Box, Never Opened

 

I snoozed and lost! ?Thanks for making the connection. ?I need to adjust my notifications!
Re: QMX Power on/off loud pop

 

PIR sensing won¡¯t work. ?¡°You should know¡­ Don¡¯t wait for me to chase you down.¡±
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Need ¡°spouse thoughts band¡± on next QMX version.
Re: A couple of issues noted with latest .23 firmware

 

For the fluctuating VSWR reading, did that happen to occur right after hitting a high SWR lockout? ('S' displayed next to the VFO frequency)
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I've found that that random fluctuation happens both when the lockout has occured and you go directly to the antenna tune menu item (without going to menu and back to the VFO screen to clear the lockout), or when you try to tune with the keyer set to practice mode.
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Greg, N1TR
Re: #qmx #qmx+ #firmware version 1_00_023 release #qmx #firmware

 

Random freeze when transmitting also happened to me exactly once, but with firmware 19.
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Haven't been able to reproduce it; could have been any number of random interferences or firmware issues.
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Greg, N1TR
Re: 60m Band tuning is broken, or not?

 

Ty it helped.
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Re: QMX Power on/off loud pop

 

Oooooh we have SPIES among us!

73 Hans G0UPL


On Sun, Aug 4, 2024, 14:39 Samantha Collins via <samcollins910=[email protected]> wrote:
You do know us wives are also present in these groups...? we also have our own special groups to spread the word on new fangled fancy dodging tactics...??
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We have eyes everywhere.....?
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