开云体育

I use a 12V UPS run by 2x 18650. These have a 5V USB socket which you can connect to a charger or pc. Mine runs 24/7 with no problems.? ?You can get these UPS from online sources for just a few

You first need to confirm it's not RF feedback. Replace the antenna with a proper dummy load and run everything. If the PC now behaves then the problem will be RF feedback/pickup.

This is a curly one. My QMX's - Both Hi & Low band, have suddenly decided they do not like 20M. The antenna is 1.45:1 on the Hi Band QMX SWR sweep. (and 1.40:1 on the Low Band) I have disabled SWR

The Xeigu G90 uses RD16HHF1 (Mitsubishi) and I need to order some (ours failed) but in this context have these devices been considered as PA for any of Han's excellent designs? I know it is a very

Just out of curiosity, did you press Capital 'P' and/or Capital 'T' in the hardware test Putty screen? You can and should hold down either of those two keys for a few seconds and see what is shown on

*I I I I I ? ? I finally learned how to use puddy.* *I changed all four bs170’s with no improvement… So it’s not the finals.* *I checked all the obvious things. if everything was correct it

Mark, Some more information in this thread. /g/QRPLabs/message/102702 I liked Ron’s approach, have been building all my 50WPA for 10m and using them on other bands, down to 160m,

I have used copper-filled thermal vias on high power microwave boards, under the active devices.? It is a costly process. 73, Don N2VGU

It seems I will not be abre to receive q QDX by October. KB7HNF John [email protected]> wrote:

Thanks for the inputs, guys. It looks like others have been down this road. Mike. That's pretty much what I'm thinking of doing. I'm planning to use an 80-to-10M LFP module I have that's rated for

Hi Rob, yes it's much easier. I implemented one with Arduino in less than 2 hours. The input side of the device is a serial port and the output side is 2 pins for left/right paddle. So it's basically

Thanks Hans! Yes I knew that, but I didn't mention it in the reply because I thought you probably wouldn't bother to implement the USB host software stack as I simply couldn't see enough use cases.

Thank you Tony! Good to know their might be a path here. Regards! ~Gordon Sent from Proton Mail Android

Muhsin has made the 20m 50W amp into 80-40-30-20, but using a slightly different approach. /g/QRPLabs/message/87170 73, Mike KK7ER

Gordon, The boot loader is encrypted so you can’t simply replace the MCU. Jeff Moore, W1NC, can assist you with this if you can’t get a new programmed MCU from QRP Labs

Is it even possible to replace a dead STM32/MCU myself on the QMX? I read that the boot-loader has a firmware decryption key. I believe my QMX has a dead MCU. I can handle SMD replacement. Q: I'm

Sorry, the voltages are too high for the capacitors and the currents too high for the small toroids. From the manual: ?T here are two important differences, both are related to power handling. Here,

George, if you just want to send CW to QMX from a computer, I have a workaround. As Robert Giuliano KB8RCO mentioned in your original thread, I have an Arduino program does exactly that. Basically

Corey, what Mac are you using? I know WSJTx on some old Macs have similar issues. When I was using WSJTx on my 2010 Mac mini with IC705, the audio stream sometimes would be routed to the internal

I have a QRPLabs 50W amp kit in the process of construction. I would like to use it with my QMX+ but would like to be able to switch bands on it. I was thinking of just bypassing the LPF in the amp