I should have been clearer with my comment on output cleanliness. I wanted a wide band (untuned) bench amplifier with up to 2W output 500kHz to 50MHz, 2nd and 3rd harmonics at least -30dBc. The

I found sth interesting. Hans mentioned Mike WA2EBY's broadband amplifier design in the manual. Mike published 2 articles in QST's March and April 1999 issues (can be easily found online). As far as I

Hello Razvan All agreed. Hmmm... and does this make me a criminal... It's an interesting situation; not even the brave sheep are entirely responsible. When election time comes every several years,

Hello This information exists inside QDX - there are two control signals which drive the band pass filter switching multiplexers that have the band information; as well as three signals to the three

Sure Bill, go ahead and send it over :-) I love challenges like this. In interesting and related news, I think I've just cured the one I was dealing with here: it was a bad solder joint on the ground

Larry, good point, the battery cells are a little old and when it was transmitting at 6W it had a 2V ripple, could be significantly higher now. I'll measure the ripple again and see. I'll also

My experience with FedEx signature required packages is rather good. I have a package (laptop) coming in tomorrow, and FedEx has gone out of thier way to confirm that I must be home to receive it,

Different bands on the same antenna system will behave differently. I would try putting a choke between the RG-213 and OCF dipole. You could try one closer to the rig for convenience just to see if it

Chuck, I'll check that out ant let you know what happens. Thanks for your suggestion.

Mike, I have RG-213U feeding an OCF Dipole up about 25-Ft. The feed line goes into a lighting arrestor then to my LDG YT-1200 Automatic Antenna Tuner. From the tuner I feed a one-meter piece of

Out of curiosity I out my Daiwa meter inline between the QCX+ and the 50W amp with a dummy load attached to the output of the amp. I measured 1.8:1. Is this expected, or acceptable? Seems kind of

Another possible option for some modes is to add support for external tuners ( ie T1) to WSPR software.

Hi all, with digital modes it is very convenient to automatically re-tune the antenna when switching modes. Many transceivers have a way of telling the ATU what band they are currently on, so that the

Check out EA3PP paddles http://www.merseyradar.co.uk/mini-cw-paddle-by-ea3pp/

Not going to weigh in on the inside outside debate, but why not use three 18650 cells and a small BMS for charging. I use this in my stand/pwr supply for my QCX mini.

It’d be simpler to bring the battery power out the back of the QCX+ through a strain relief just above the power plug. Make the power cable just long enough to plug in the power socket, perhaps

Doug the 8 X AA battery pack has been the same batteries for over five years ... very cheap and easy to find anywhere ... with all the complexity of BMS and charging a flammable battery pack inside a

Nick: I suspect the 20V battery system under an attempted draw of perhaps 8-10A is giving you much less than 20V at the final transistors, hence your low power output. Do you not have a proper

Ken, Interesting. QRPBuilder seems to be an extension of QRP Guys. I love their/your SWR/Power/Dummy load. But I’ll have to be honest with you. Your free-standing iambic key costs $45.. For under

Hi Julian, no I don’t have anything new, the gain of the receiver does seem very high compared with my other QCX’s. Strong signals tend to overload the final audio amplifier quickly, that is why I