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Re: QMX+ and DTR/RTS like CW keyering
Hello Ken This will be very easy to do with a simple script once I have implemented the intended BASIC scripting. 73 Hans G0UPL http://qrp-labs.com https://buymeacoffee.com/g0upl
By Hans Summers · #146558 ·
Re: QMX Plus in contest
Thanks Roelof. It also matches what Stan mentioned earlier. So that's fine, I will code it like that. 73 Hans G0UPL http://qrp-labs.com https://buymeacoffee.com/g0upl [email protected]> wrote:
By Hans Summers · #146557 ·
Re: QMX Plus in contest
Hello Hans, The tuning step as set in N1MM is 10Hz. Rit engaged, N1MM run mode: key up, CAT monitor receives RU00010; key down, CAT monitor receives RD00010; 73, Roelof, pa0rdt
By Roelof Bakker · #146556 ·
QMX Plus Outputting Loud Audio Noise
Just powered up a newly build rig.? The display and control functions seem to be working.? I can change bands and modes.? Using a lab supply running around 11 volts and nothing unusual in current
By Curt wb8yyy · #146555 ·
Re: QMX Receiving FT8 but No Change When Antenna Disconnected
Ah, thanks for catching the wrong schematic. Checked T501, L502, T507, and L514 ¨C those all have continuity (and L514 measures out at 1.2-1.5 ohms). I reflowed them just to make sure there's no
By tanner@... · #146554 ·
Re: QMX+ L504 1/2 W or 1 W?
I just broke mine, also. It's too close to the edge of the board, so my PCB assembly clamp broke it :-(. I don't have an assortment of axial inductors, but when I look online, the seem to come in 1/2
By Dave New, N8SBE · #146553 ·
Re: QRPLabs 10 Watt Linear with QMX+
So.. I also have the 10 Watt amp that was designed for the QSX (head hanging in grief). I intend to put mine in ?uBitX in place of that amplifier. Or, just build something based on the same
By Bill Cromwell · #146552 ·
Re: QMX+ and DTR/RTS like CW keyering
A suggestion along the same lines¡­There is currently an as yet unused ¡®AUX¡¯ connector on the rear of the QMX+. I have an autotune atu that puts a PTT output signal to the aux input of my HF rig
By KEN G4APB · #146551 ·
Re: Low input levels in WSJT-X with no way to adjust them #mac #qmx
Hello Zachariah, Use the Terminal program to access the Band Configuration screen.? On that page, you can adjust the audio gain for each band.? The details are in the operating manual on page 95,
By Evan Hand · #146550 ·
Re: QRPLabs 10 Watt Linear with QMX+
Guys, if it is not a silly question, why did you not leave out the 2xBS170 pre-driver stage on the 10w linear amp to reduce the gain and not need such a large (value) input attenuator? The 50w amp (I
By KEN G4APB · #146549 ·
Low input levels in WSJT-X with no way to adjust them #mac #qmx
I am on a Mac M1. I basically have everything working except that unlike Windows and Linux, the USB soundcard in the QMX has no way of adjusting output/input levels in system settings. Everything is
By Zachariah · #146548 ·
Re: QRPLabs 10 Watt Linear with QMX+
To use 10W linear amp from QRPLABS with QMX or QMX+ , power PA mosfets with 5V instead of 12V. This will reduce power to 300 to 500 mW which is easier to tame with attenuators. Here is my take for
By Barb WB2CBA · #146547 ·
Re: 50 Watt Power Amplifier - Low Power, High Harmonics #50w #50wpa
Hello Aki and all still following: Thank you for those measurements. Your measurements show a very similar performance for the attenuator. ( I am sure I'm not the only one wishing I could read the
By wtshyman@... · #146546 ·
Re: QDX Low Receive but Xmit fine with OSX
Not familiar with the Mac. The firmware update should not involve the terminal. You copy the firmware file over to your rig as if it were a flash drive. Read the section on the firmware update
By Jerry Gaffke · #146545 ·
Re: QRPLabs 10 Watt Linear with QMX+
Hi Nate, Actually I did not worry about that. I use a separate receive antenna for the QMX. I have a relay antenna switch between the QMX and the amplifier to connect the RX antenna when receiving.
By mux_folder2001 · #146544 ·
Re: QRPLabs 10 Watt Linear with QMX+
The 10W linear is at max 50milliwatt drive, typical is more like 20-25milliwatts. So attenuation of the SMX will be in the range of 18 db and need to be switched out for RX. All that for maybe 10W, no
By ajparent1/kb1gmx · #146543 ·
Re: QRPLabs 10 Watt Linear with QMX+
Hi ChuckR, There are no receiver impacts as long as the voltage is above 7 volts.? The PA will run cooler, and there is more voltage overhead to protect against high SWR. I run my QMX and QDX on 8 to
By Evan Hand · #146542 ·
Re: QRPLabs 10 Watt Linear with QMX+
Hi Ken, Well, I did not build it to protect the QMX. It is just a side benefit. As for the low pass array, it came from eBay and is from an old IC-765. All of the relays on the board were in need of
By mux_folder2001 · #146541 ·
Re: QRPLabs 10 Watt Linear with QMX+
It's me AGAIN! What are the pros and cons (other than a? aprox 1 watt drop of rf) of running a 12 volt QDX+ on 9 volts? -- 73 ChuckR
By ChuckR · #146540 ·
Re: 43 or 61 mix on 6m QDX-M?
If it is shiny black then it is 43 If it is dull black then it is 61 I changed all mine (QDXs and QMXs) to the 61 and used RWTST for 12V transceivers (¡°Really Weird Twisted Sisters Transformer")
By Muhsin TA1MHS · #146539 ·