Peter, there is an easier route, at least on my win10 PC: Right-click the speaker icon in the taskbar (bottom right), a menu pops up, click sound. Select playback or recording tab as needed. 73 Johan

Dave, which firmware version was running in your QDX when this happened? 73 SM6LKM Dave Bauer wrote:

Willie, did your QDX break down spontaneously when receiving, when switching on or off the power supply, or perhaps when switching from RX to TX? Which firmware version did you run? 73 SM6LKM, Johan W

Steve, 2N7002 may work well as Q4 but it has a higher turn-on Vgs threshold than BSS123. From Onsemi data sheets: BSS123: VGS(th) = max 2V at VDS = 2V for 1mA drain current 2N7002: VGS(th) = max 3V at

Hello Brent, on RTTY, do you use the default QDX configuration settings for "Minimum cycles", "Minimum samples" and "Discard cycles"? From memory I recall that QDX, with default settings, measures the

#qdx

Hi An autotuner can present *very* bad loads to the transmitter during the tuning process. Overvoltage will kill the MOSFETS quickly while overcurrent will take some time to achieve the same result si

Did you press ENTER? QDX needs to see a <CR> / 0x0D character on the serial port to enter terminal mode. The menu will not pop up on the screen until you do that. 73 SM6LKM G8HAV wrote:

#qdx

Has anyone tried RTTY and/or FSQ with QDX? 73 SM6LKM

Steve Z wrote: Unfortunately not. Some schoolbook examples of BPSK abruptly change the phase 180 degrees and this creates huge sidebands which is similar to hard "key clicks". This is the reason why P

Congratulations on the reverse polarity protection! Without it the QDX would have been transformed into a QUP 2 or even QUP 3 :-) 73 SM6LKM Den 2021-12-30 kl. 13:12, skrev Hans Summers:

#qdx

Hi, I looked at your 20dB 5W attenuator and I can confirm that the ceramic Vitrohm power resistors (marked VTM) are indeed wirewound. I've had a lot of them in my junkboxes through the decades :) They

#troubleshoot

No, I haven't tweaked it but I measured it. I found the unwanted sideband response 24kHz below dial frequency on 40m and it was about -50..-55dB below the wanted signal. Quite good in my opinion, cons

#qdx

40m is unusually quiet here tonight but i managed to get a glimpse of TA4/G0UPL on 40m JS8CALL. Rig is QDX with fw v1.02 feeding a piece of wire (indoors!) through a -6dB resistive SWR bridge. My ERP

Another idea: Use a 74AC74 or similar flipflop to divide the VFO frequency by 2 or 4. Then use the multipler setting in the VFO firmware to make the display show the divided frequency. Gate the VFO->f

...or dig into your junkbox and put a <= 28k8 bps dial-up modem between the webshop server and "the Internet" to ease the burden on the server :) Much cheaper than replacing the server HW :) 73/SM6LKM

Wind! ;-) Jason Potter wrote:

If you're planning to sell caps with optional cooling fan I'll pre-order 5 such caps immediately! :-) 73 SM6LKM

Hi, Tom M7MCQ wrote: 73 SM6LKM

#qdx

That's the glory of running a one man company. You are entitled to hold all the fancy titles yourself. CEO, CTO, CFO, CIO et.c, you name it :-) 73 de SM6LKM Hans Summers wrote:

SM4FZW operating the key during a QLF competition on a fieldday: https://www.socwa.se/users/SM6EAT/219-1.jpg 73 SM6LKM David Wilcox K8WPE wrote: