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If you're looking for more info on those HP and Agilent power supplies, it's now on the Keysight website. Agilent, which was originally spun off from HP when the parent company chose to focus on its

I worked many years for HP/Agilent, so you can guess my suggestion!! Fortunately, it's just a power supply, so not priced crazy. You can also find cheap (garbage) but workable imported jobs on

The best solution is to use a good, resonant, low SWR antenna. I have made almost 500 contacts with my stock QDX (ver 5) and have had no issues. My QDX is powered by a 12v 1 amp switching supply. Jim

Denny, The following are not "Name Brand" that I have purchased and am very happy with the performance: For a linear supply, I have the

Hi Denny, I personally use this one: https://www.amazon.co.uk/gp/product/B09C8LWV9W/ref=ppx_yo_dt_b_asin_title_o07_s00 It has a switch which turns off output power (I was surprised to see this was

Sorry Dave. I should have been more specific. I want a test bench power supply for construction and testing of QRP radios like the QMX.

For what purpose? rig high power, rig low power, test bench PS? ??

Hi Bojan, I've read a number of comments about an adjustable current limiting PS and I am wondering what you and others are using and would recommend. 73 - Jon Halterman - KJ4CRW

I would appreciate any recommendations for a decent current-limited power supply. I’d prefer to stick with brands of known quality, but would appreciate any suggestions you might offer. Denny

Even if it seems to be deaf, should I still have audio out of the headphone port of some sort? I do not…

Hi all - mine is also complete and working extremely well. Amazing kit and service from Hans so a huge thank you there. Built for 12V, 5W out on all bands except 20m where it's 4W. I made lots of

Thanks, Cliff. I don't have any left over from my RPIs, but I found something on Amazon. I'm going to give that a try. Wayne KB4DSF

Thanks Hans, A friend of mine recovering from two strokes built the QMX before joining this group (showing all the issues) and it worked to his satisfaction. He is sending it to me as a gift as he

It all looks good to me, Bojan 73 Hans G0UPL http://qrp-labs.com https://www.buymeacoffee.com/g0upl wrote:

Hi, these are my first QMX HW test measurements. 73 Bojan S53DZ

Hello Dave I don't think that is necessary. With a lot of effort, messing around with a poor intermittent 12V power supply connection, while simultaneously holding the left knob (power on/off)

p.s. N3AAZ

In this line of emails does it mean one should not turn the power ON and OFF in rapid succession or even semi quickly because it takes a few extra milliseconds for the power supply controls to do

KI7MWA This may help you troubleshoot To measure? "rf"? I use this circuit and a common dc Volt meter (DVM) At 10 mHz and 5 Volts and one BS170 Measure at output of C5 with filter

Hi Pierre, my QDXs are built for +12V. I am using these practices: - added an antiparallel 1N4148 to L14, - using a good +12V PS with a 1A current limit (and no higher voltage), - matching the antenna