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Hi David, It's nothing special at all - honest. It's a pure 8ft square loop which is fed at the bottom centre via a suitable matching unit in order to transfer as much power into it as possible

Hi Andy, Can you share a bit more info about your loop and its tuning? Especially for the lower bands. Best Wishes David G8XBZ -----Bits of Original Message----- From: QRPLabs@...

Hi Hans, Joking aside, I must admit to being drawn to your website some time ago as I was looking at stuff for various interests of mine. The valve tx being one, but it was more the NBTV stuff that

Kits for them next week then ? ;-)

Hi Andy Glad it's working so well! For those who are interested: the 1-valve TX is here: http://www.hanssummers.com/cwtx.html The receiver and ATU were also homebrew

Just for info,I've had the U2 and the UP501 module on ever since I got the beta chip in and never switched it off in the last few weeks. It's never skipped a beat! Today was the first time I'd

Do you mean that it starts high and then a few seconds later it drops ? Or do you mean that the higher the frequency = lower output ? With 3x BS170 @ 9v you will typically see:- 1.1w to 24Mhz 650mw

Indeed, very nice. cheers, Graham ve3gtc

Hi Francesco I noted a drop in power after 10MHz in my tests but didn't worry about it, not 50% at 14MHz but a full drop 50% at 18MHz which the rises to give more power on 28MHz. It is a simple

Nice and neat, and compact. Thanks for sharing. 73 de Andy

OK Slave Driver The quickest way was a Web Cam video which does give an accurate impression of size. Thoughts were:- Small size, light weight for portable use, ergonomic 2 thumbs operation of the

To forum, help me please. Have a question. I notice that on 20m the power output drops dramatically (~50%). Necessary fine-tune the LP filter? Or are other problems: eg. DDS-VFO? TKS Francesco,

Yes and with the U2 being capable of knowing where it is (although I might be unsure) and inserting the QRA Loc. automatically. I am looking forward to the Trimble GPS compatibility being

I think that's the key to it all. Throw up a wire in the nearest coconut tree, leave a U2 running and come back later after the beer has run out to check the results. Said in jest but

LOL! Maybe this one would be suitable for Eddie's hot 6m PA ..? http://tinyurl.com/ovx4bqw ;-)

Nah! It's got to be one of these to house it... Room for some boiled eggs and soda pop too :) http://i72.photobucket.com/albums/i175/hantercans/picnic.jpg Philip G4JVF

Andy et al I love QRSS on holiday. Don't forget that this whole kits thing came from my Caribbean holiday in 2009. 2 hours of crazed building in the middle of the night, before rushing to the

That is an extremely generous gesture, and I appreciate it. Of all the groups I subscribe to, this is the one that ticks all the boxes for a 'Happy Family'. There is information, help,

It's why I also like SPRAT. Always good to see how others innovate their unique contraptions ;-) Come on - hurry up ! I've got a few ideas, anything could happen in the end. I was hoping to have

Ooops, I forgot. I hope that this is working now: https://docs.google.com/file/d/0B8b6bnNJiDdQa1p1aGdMOUFIc2c/edit?usp=docslist_api But it is not a U2 :-) 72 de Hajo --- ... indessen wandelt