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Re: Automatic Antenna Tuner, Internal Battery with a charger and built-in speaker for QMX+. Open Source.
Thanks for the confirmation Sardar! I have three sets of boards that I purchased that I need to recover, expense-wise. Only the ATU boards are somewhat expensive and the only thing changed is they
By Cal (AD8Q) · #133755 ·
Re: QMX - RF sweep locks PuTTy and device; unable to receive
Can you give me a quick continuity test list? I checked them all before assembly, but may have missed one because my test list was incorrect.
By Casey KC3YHP · #133754 ·
Re: QDX - Extra Capacity on the 5V supply?
Simpler still would be a resistor...... 73, Don N2VGU
By Donald S Brant Jr · #133753 ·
Re: Wall warts can be fatal to QMX :-(
If you're not worried yet, I'll bet this traveler's tale will do it. I had a business trip to Fiji last year so bought a power plug adaptor on Amazon to use my JA/US devices with the Australian large
By Steve in Okinawa · #133752 ·
Re: QDX - Extra Capacity on the 5V supply?
Simple and possible. I like that. GREG Yahoo Mail: Search, Organize, Conquer On Sun, Nov 17, 2024 at 5:41 PM, Nick Garrod via groups.io<gw6jhk@...> wrote: An even simpler solution
By Greg McCain · #133751 ·
Re: QDX - Extra Capacity on the 5V supply?
Thank you.Noted. I'm also considering just adding a 2.1 barrel jack on the rear end cover ( same end as the proposed fan ) and then feeding the 5V in from an extra port on my INIU power bank via a USB
By Greg McCain · #133750 ·
Re: QMX - RF sweep locks PuTTy and device; unable to receive
Such receive errors could potentially also come from open or crossed connections on your trifilar transformer T401, or similar issues on L401a/b.?? Open connections on these can creep in if the
By Stan Dye · #133749 ·
Re: Newly QDX - First Checks - Question about Power Out
Roger Wilco!! :)? GREG KI4NVX? Yahoo Mail: Search, Organize, Conquer
By Greg McCain · #133748 ·
Re: QMX - RF sweep locks PuTTy and device; unable to receive
Say it ain¡¯t so! ? I¡¯ve emailed Jeff. Thank you.
By Casey KC3YHP · #133747 ·
QMX+ AGC Settings
Hi Anyone else like to share their AGC settings? I like a fast attack time and fast recovery...seems to work nicely for me. Threshold S 4 Slope dB per dB 50 Noise filter 0 Hang time 2 Smooth samples 0
By Steve G4EDG · #133746 ·
Re: Automatic Antenna Tuner, Internal Battery with a charger and built-in speaker for QMX+. Open Source.
Cal, Forgot to mention - if you are going to order more ATU's - please also use fabrication files from project's GitHub repo (version1.1-beta is fine). Those have no power supply components. -- 73,
By Sardar (AC8L) · #133745 ·
Re: Automatic Antenna Tuner, Internal Battery with a charger and built-in speaker for QMX+. Open Source.
Cal, Yes. That version1.1-beta branch has all the latest fixed fabrication files and firmware. - Latest version of a companion board V1.2 committed to version1.1-beta branch also has those two M3
By Sardar (AC8L) · #133744 ·
Re: QMX - RF sweep locks PuTTy and device; unable to receive
Hi Casey, I had exactly the same issue.? Ultimately, the problem turned out to be a dead PCM1804 chip, which I was able to replace using a hot air rework station and some careful soldering.? To
By John VA7JBE · #133743 ·
Re: QDX - Extra Capacity on the 5V supply?
An even simpler solution would be to use a 4.3V zener diode in series with the fan and run from the 9V supply. ? It would be dissipating 1/4 of a Watt at 31mA, so size accordingly. Nick G0OQK.
By Nick Garrod · #133742 ·
Re: Rotary encoder ... an inside look!
Mike Thanks for posting this picture. Ive had one of these apart in the past...I seem to wear them out quite quickly. Looking at your photo I determined that if I drilled a 1mm hole between the RHS
By Steve G4EDG · #133741 ·
Re: Automatic Antenna Tuner, Internal Battery with a charger and built-in speaker for QMX+. Open Source.
Unless this factor Dirk mentioned in a previous post is true. Based on my tuning experiments with the single button and trying to reset the ATU with a long press, I think it effectively goes into
By Cal (AD8Q) · #133740 ·
Re: QDX - Extra Capacity on the 5V supply?
Its safer to use 7805 on dc input jack and not trying your luck.
By Ivica - YU1QRP · #133739 ·
Re: New kit just stopped working after unplugging the power
Interesting.? It looks like the processor is having a hard time controlling the 5V power supply.? It shows that it is using close to the 'max' duty cycle, which would be to increase its voltage, but
By Stan Dye · #133738 ·
QMX - RF sweep locks PuTTy and device; unable to receive
I am trying out my QMX mid-band that I built. It is connected to known working coax, to the QRP Labs dummy load I built last night. SWR is 1.4-1.5. Main issue: I can hear my key¡¯s sidetone but
By Casey KC3YHP · #133737 ·
QMX Mid Band RX issue
Someone Please Help ME! The QMX Mid Band model I assembled on Saturday also cannot resolve the loud RX noise. I was able to receive the CW signal sent by placing the QCX-mini next to it. I was happy
By Mitsu TOMATSU · #133736 ·