Dan, I do enjoy the open discussion that occurs in this group. It helps me understand the RF aspects that my industrial electrical and automation control background did not cover. I do own a TinySA,

Julian, I apologize for any confusion. The noise is NOT dependent on volume control. It can be heard with volume turned all the way down. With volume all the way up I can hear the receiver and the

Evan AC9TU, Gary K3WK, and Dave W6OG, Thank you for engaging in discussion of this subject. It is a bit off-topic for this thread, but it illustrates the importance of understanding both the

This was very interesting. I can find this noise (more like a similar noise) in several places going all the way back to pin 1 and 7 IC5. The only place that the noise matched exactly to the headset,

Yes, I've had that experience too, but a) Bryan said that the noise is dependent on the volume control position, which would suggest C21 - before the volume control, and b) usually there is an obvious

I am trying to use this VFO as the basis of a 80-10 Mhz transceiver. I don't seem to be able to set the offset value for different presets. Once the offset is set it for 80 meters with a 9.000mhz

I had this same issue with my QCX+ after I built it. Replacing C22 resolved the problem. 73, Bill NZ0T

Hi Mike, since you're using Windows, you can forget about the references to Linux ports, such as this "/dev/ttyACM1" or similar. It's going to be COMx, where x is specific to the QDX in your

Julian, All the test points on all other ICs were at 000.2 mVac. Then IC10 Pins 1 and 2 were at a baseline of 10-15 mVac with crashes going up to the 35 mVac range. Like you said the reaction time of

OS is W10 COM is (I think) what it defaulted to at startup. /dev/ttyACM etc is per instructions in manual Mike

BT speaker: yep, we can certainly talk more about that. Scope: absolutely, you'll be glad you did. My first was a "USB oscilloscope", an Owon VDS1022I, which uses a Windows app for the user interface

This looks like an interesting possibility as I do have Bluetooth seekers lying around. I might need some details about where to use this, and more importantly where NOT to. I might just pop for a

Yes, as far as I recall and that is about the only difference. Hans' instructions work in Windows. 73 Alan G4ZFQ

Andrew, I don’t see where you state the issue/error you are trying to resolve. Let us know and maybe someone can help. 73, BrianB N6CVO

I bought a ready built QCX+ a few months back and after a few days of faultless operation it developed a weird fault involving very strange noises - digital pulses audible and horrifically loud

Mike, "COM1" is a Windows serial port, while "/dev/ttyACM1" is a Linux serial port. Let's start here: what OS are you using ? -- Julian, N4JO.

Very nice. Reminded me of Christmas Eve 2020 when I built mine. Sadly, that particular radio is presently broken after a short circuit was created between the drain and gate of one of the PA fets....

On the little Settings gear you can slow down the video. Look on the bottom edge of the window, near the right hand side.

QDX is built. Rx /Tx working. RF output slightly low: 9V supply, no reverse polarity protection diode (yet): 20m 4.5W Est. Efficiency 66% 30m 4.5W Est. Efficiency 54% 40m 4.4W Est. Efficiency 63% 80m

But this video has wiring and some impressive repair technique, when there are not a lot parts in your junk box. It is mostly wordless workshop, but you can turn on English subtitles