Hi Alan Thanks for those final clarifications. It's amazing how these small details escape you if not used regularly. Got it working OK and I think it's in 1.07! I'll try to remember how to get putty

Hi Alan I'm OK up to here.... QDX is then a memory stick. Open it in File Explorer. Where in file explorer do I find it? Sorry if I'm being really dense! Mike

Hi All Can anyone point me to (or write) a simple blow by blow instruction sheet which doesn't keep referring me to different texts. My short term memory is not what it was and although I've done this

Hi All Thanks for your re-sends & additional info. Much appreciated. Downloaded igvna. Worked OK first try. So simple compared with original that I thought it wasn't working at first. Antenna looks go

Thanks to everyone who responded to my request. In my haste to make sure the messages didn't get deleted, I decided to "mark as unread" & a combination of aged shaky hands & sleepy brain have conspire

Here's a pic of the vna device

Hi All Slgihtly off-topic - apologies...... but anyone any ideas where to download the software for the very original mrs Mini VNA. Spent best part of the day on the Web without success. I can find fi

I think you'll find that 100ma RX current was typical of early versions. After the various updates I would suggest from what I've seen in recent posts that 150ma is more typical now

#qdx

I think the 100ma RX current value was from early QDX history and with the various upgrades most recent builds have been averaging out in the 140-150 ma range. I believe there was a note to this effec

#qdx

Hi Dan Had same problem. Attached recommendations from Evan worked for me The most likely issue is the audio level being sent to the QDX. The first thing to check is that the correct audio devices are

#qdx

Evan Thanks for the feedback. Yes I was aware of the need to maximise audio levels from manual & previous posts. However I had'nt needed to do this earlier so hadn't been looking in that direction. No

Should have added: Original QDX Only mods 3v reg fed from 5v line; 1 turn less on L12 Firmware 1.03

Hi All QDX working well TX and RX. Made minor adjustments to L12 to centralise RF sweeps. No other changes except some PCB clean-up. I can connect to QDX using either WSJT-X or Terminal Emulator (PuTT

Hi Mark, Alan Thanks for the guidance. Spent a good few hours over the last two days jumping between device manager and USB Hub Tree. The Tree was showing connections to QDX but with errors. Device ma

#qdx

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

#qdx

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

#qdx

Hi Alan, Evan Apologies for having taken up your time with this enquiry. I have now downgraded myself to "Newbie" having committed one of the basic kit building sins (I believe the photo says it all).

Hi Evan Thanks for the feedback. I had already checked the BC170 voltages and all showed 0/2.5v as expected. What I omitted was to repeat the measurement across all four frequency ranges (and didn't n

Hi All Completed my build after replacing short circuit C38 (see separate thread) Now in set-up phase, still with minimal resources after house relocation (have only laptop, 50 ohm dummy load, DMM, so

Here's the promised photo of the substitution in the Rev 1 Mini. Difficult to see exactly what is happening, but no sign of any scraping! Unfortunately my memory of last year's actions is hazy at best