Re: #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Replying to my own question here!? I don't think the Icom 705 microphone can be made to work as the PTT and microphone output are connected together.? My guess is when you press the PTT on the microphone this applies the 3.3V feed to the microphone and powers it up.
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However, I have discovered that a Baofeng* micriophone works perfectly and has the connections in the correct order on the 3 pole plug.? I say "perfectly" in the sense I can set a suitable gain using the microphone test.
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*? and possbly a Yaesu microphone as well but I haven't tested this but I can find micriophones for sale which say they are suitable for Baofeng and Yaesu.
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John
M0WIV
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Re: ProgRock2 programming??
On 02/04/2025 14:33, Tom Smith via groups.io wrote: How does it work without some DC going to pad 6 of the unit? It seems the unit would need the pad 6 to be connected to a voltage source. Tom, Yes, pin 6 or 12 needs say 5-12 volts to power the Progrock's 3.3 volt regulator But the output of the 5351 pin 7 must not have an external voltage connected. If there is voltage a capacitor is required. Ground is connected separately. 73 Alan G4ZFQ .
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Re: SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Hi Mehmet,
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I think the calibration procedure relies on both TX and RX. Is your RF/LPF scans look good on 20m?
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And transmitter voltage should be near 0V when not transmitting.
--
73, de BD8BTE
op: Lun Yang
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On
3/31/25 I had a CW practice / rag chew session on 20
meters. I worked one station:
| Date
/ Time |
Call |
Bnd |
Frequency |
Mode |
Power |
Rec |
Snt |
Name |
SPC# |
Off |
Comments |
| 3/31/2025
13:27 |
NM1I |
20 |
14.047 |
CW |
75 |
599 |
569 |
Butch |
MA |
13:53 |
K3
at 75 watts 100 ft sloper doublet |
Conditions were OK.
SSN = 111, SFI = 171, A = 6, K = 3.
My next CW practice session will be April
04 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 -
April 04 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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discovering more things on the rig. I finde, that the min. audio volume is still quite high but could not find a setting to alter that ( apart from muting it)
--
Martin
DK3UW
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Re: Gibberish characters appended onto end of Message 1
I had this also, just deleted and re-entered the message and that fixed it. Weird.
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Help ID QDX Digital voltage and band option
Hello,
?
I bought a QDX used and never got around to using it. What is the best way to tell what voltage it requires and if it is high or low band? I believe it is 12v and low band, but not 100% sure. It power on ok with different voltages, and wsjtx allows me to select any band. I didn't want to try txing since I might be using the wrong voltage. Thanks! 
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Re: SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Leaving the 20/80 BPF TXswap disabled,? I messed around with the band edges and center frequencies for 20m and ended up with this. It doesnt resemble any of the examples I've seen:
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Is this good, bad?
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I also, I found that leaving everything as is and rerunning the same calibration, I get a totally different plot!
?
?
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Lun, are you getting the same plots consistently on each consecutive run on the same band?
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I cant make any sense of this at all...
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Mel. M0KMD.
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Gibberish characters appended onto end of Message 1
I have programmed my first message into the qmx+, but when I play it back on the air, it appends lots of extra characters at the end. The characters do not appear in the message memory when you view or edit it.
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I just noticed a funny thing . My Logging software indicates the QRG? and when in A&B it indicates VFO B and not the receiving VFO A. On transmit it then changes to the QRG of VFO A but transmits on VFO B. Is there a bug in the CAT ?
--
Martin
DK3UW
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Hi My reader is very erratic with a lot of *. can someone who has a good setting let me know how they are please
--
Martin
DK3UW
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Re: Firmware nightmare — gibberish (!) help needed
Thanks, Hans, I think they call those "AI hallucinations"!
?
Randy K7RAN
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Re: ProgRock2 programming??
Two comments here:
?
- Yes, the ProgRock2 (nor the original) have coupling capacitors on their outputs.? If you aren't sure if you need one, add one!? Don't go overboard with the capacitance - perhaps a value that will provide an Xc (reactance) equal to or greater than 1/3 of the expected load impedance at the lowest frequency.?
?
- Even though they are "rated" for "12 volts" don't even think about running one at that voltage:? I'd avoid going above 10.0 volts.? Either put a voltage regulator there (anything from 5 to 10 volts is fine - there's no point in more than 5) or if you do have a fairly stable 10-12 volts, a 47-68 ohm, 1/2 watt resistor in series with each (expect 40-60mA consumption - do the math) to limit the voltage.? I "discovered" that even when running from 12.0 volts (from a 7812) that the ProgRock ran very hot - and two of them failed in quick succession, hence the warning.? 5.0-9.0 volts is more or less the sweet spot.
?
73,
?
Clint, KA7OEI
?
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Re: Qmx plus rev 2 not powering up
Hi Ludwig
I have ordered the correct Mosfets should arrive tomorrow, I will measure the LIN_REG_EN and then solder the mosfets, just to confirm the LIN_REG_EN should be 12V when the button is pressed in hardware version QMX+ if QMX (No +) with different revisions might have only 6V, correct?
?
73 Azgael
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Re: Low current BIAS SMPS
Or actually not! It looks as if the transistor had been in place and fallen off. When this did happen cannot be said. It even would have been possible to pass a function test.?
I’m happy that it was possible to fix it easily. This even makes building the kit more fun. The next days I will run further tests to see what I might have done wrong. But I really love the stacked design and the great debugging utility. It’s a great piece of tec! Love it!
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Re: SSB audio distortion #qmx #SSB Firmware beta 1_01_003 release
#qmx
#ssb
Hi Lun,
?
Thanks for the tip.
Sadly, it didn't work for me.
?
?
?
?
Mel, M0KMD.
?
?
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Re: ProgRock2 programming??
I didn't add one. How does it work without some DC going to pad 6 of the unit? It seems the unit would need the pad 6 to be connected to a voltage source.
Tom
On Wednesday, April 2, 2025 at 09:16:32 AM CDT, Alan G4ZFQ via groups.io <alan4alan@...> wrote:
On 02/04/2025 13:54, Tom Smith via groups.io wrote:
> I plugged it into the equipment and it seemed to work for a few minutes then stopped. I’m not sure why but I’ll set up another unit for another frequency and see if it does the same thing. It may be something in the equipment oscillator circuitry killing the PR2 (maybe a voltage issue)
Tom,
I think I'm right in saying there are no isolation capacitors on the
Progrock's outputs.
I hope you added one.
Any voltage on the equipment's crystal socket could damage the 5351.
73 Alan G4ZFQ
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Re: SWR and PWR does not show lcd
Same Issue with mine.? QMX Rev 4, firmware 1.00.027.? No PWR nor SWR showing up. f/w issue?
?
thx
JD
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Re: Debugging BS170-related issues
Yes. The stripe is on the pin 1 end of the device.
Tony
AD0VC
toggle quoted message
Show quoted text
This is probably a stupid question with an obvious answer, but I don't want to screw it up....
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Received replacement parts from Digikey. Removed old IC503 without incident (first time using ChipQuik).
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The replacement 74ACT08SC-ND does not have the standard pin 1 dot I have come to expect on an IC. It does have a solid, white bar. Can I assume that is the pin 1 dot ?
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Thanks and 73,
Steve, N2IC
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Re: Low current BIAS SMPS
Reminds me that an automated comparison of board images taken after assembly should be able to catch this sort of fault before it gets shipped thousands of miles around the world.? You can even see the dimples in the solder paste where the transistor didn't stick.
-- 73 -- rec -- ad5dz --
Q501???
Nice find.
Reminds me why carefully inspecting the whole board under magnification is so important.?
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John Laidler
Braden Glett
Randy K7RAN