开云体育

Thank you Shirley, I will have to take a closer look on how to do that, so far I've just printed the order out and mailed it with the Check.? -Justin N2TOH

And, if I remember correctly (I do not even have a QCX!) this problem was actually due to "Power Amplifier instability, solution by Daniel Ekman SA2KNG" on that page 73 Alan G4ZFQ

Digi Key will ship for free many items if you pre pay for your order+ your states sales tax by check and snail mail it in. I'd done this a few times and it's a real CYA option for those times you

Jerry, This is covered here http://qrp-labs.com/qcx/qcxmods I would suggest you take care if you do any other "unofficial" modification. 73 Alan G4ZFQ

Looking at enclosures I noticed that PD7MAA suggests changing c33 to 150pF for 20 meters or 17 and putting in lower dc resistance inductors for display stability: “There was a power-on and LCD

Joel, It seems to me that IC2 is not starting up properly. You have checked all the voltages on the LCD? If that is so then please contact Hans, he does not seem to be reading this topic. 73 Alan

ok this measure is very interesting and it is similar to my feeling, but i have no? possibility yet to measure phase noise closed to carrier best 73 ? ? ? ? If you are referring to a phase noise

okay I did a lot of reading of the manual - but this is still not quite intuitive.? must I set the QCX for WSPR operation before plugging in the GPS?? could this alone (along with an open circuit on

F1US, If you are referring to a phase noise plot that I posted recently that was meant to be sent only to Hans. It was 116 MHz Please ignore it. Dave VE7HR Sent from my iPhone

Dave has a nice operational review on his YouTube channel.?https://www.youtube.com/watch?v=c6jAV-_TOa8 and has the guts to have us watch him use it in a real QSO!? Good job, Dave!

Hi Bill. C30 and L4 ARE important for good operation of a class E amp as you want losses to be minimum here. Take a look at pages 112 and 113 in the QCX manual, and the referred articles, which go

Thanks for the tip guys. I just moved a L5 and went back to check. Open! I have a bin-full of 22uH so put one in as a replacement. Will see how that goes! -- Wes AE6ZM Hereford, AZ

Thanks all for your reactions. I have built my QCX for 30m. The fact that its output power is higher on 40m is unintended and not the result of some sort of deliberate compromise. My new LPF should be

Vernon Matheson said: "Al what is your signal look like with the?5 watt PA out of line. Is it possible to disco it and just run your U3S barefoot." Vernon, here is my U3S barefoot outputting 200mW

Arrived in Onslow Nova scotia today Dec 13th.posted from Japan November 27th Thank you Hans and Happy Holidays to you, your family, and staff. Vernon - VE1VDM / VA1VM

You don't even have to mail in your Digikey order, just the check. You can assemble the cart online and then choose to mail a check to pay. You wait a bit longer for your parts but you save

Thanks Hans.... my only problem my junk box is not that well stocked.... I have new parts on order. 73 Kurt - W2MW

hi all regarding phase noise measurement , what is output frequency? phase noise is not so bad , but spurs are very high depending of frequency (-40/-50db) to solve it ,i made an injection locking

Thanks Hans, I figured that was the case. Thought I would check before I did much work. FYI here is a phase noise plot on my unit. Don't know much about PN application but I think it looks not bad. Or

I see many sellers on eBay (USA) where you get a bunch (stock the parts box) shipped to you for less than