Hi all Just finished my new mini, A straightforward but careful build and a couple of hours later my 20m mini QCX was working. Worked first time but only about 1watt output, I followed Hans little tun

Hi All If your in the UK and need a electrolytic 10uf 25v cap I have a lot of them here, dont bother Hans , just send me email and I will be happy to send one out free of charge, I will even cover the

Hi All Well I’m still waiting for TNT to deliver my mini, it was, according to the tracking out for delivery on Friday 7:20am, But no sign, I checked the TNT Tracking via the web site and it still sai

Thats a lot of power from 3 x 170 fets! I see your running it with the 50watt amp, the manual suggests keeping the drive to below 5 watts so it maybe a good idea to drop the voltage on the QCX a littl

Thank you for the very kind offer, lets hope I don't need to take it up! 73 for now Paul

Hi Andrew Thanks for taking the time to reply, i think you mis-understand my comments on the bias current, with the pot turned fully anticlockwise the voltage on the gates of the fets is zero and the

Hi Tef Well yes I do have 5 watts to drive it with but due to the type of test I was doing (no output connected since I had the low pass filter in bits and testing for the rf out path part by part) i

Hi Dave, I Removed and refitted the trifilar toroid (it was fine) and just about all the others too. but now i have made some progress, i removed each of the LPF toroids one by one working from the le

Hi All I have built a couple of 50watt amps now, and they have been great no problems at all. But.... I have been asked by a local friend to take a look at his amplifier as he cant get it working, No

Anything but SMA, i have broken to many of them! RCA is small which may help keep the size down, but BNC is well tested in this application. Either will fine by me. 73 Paul M0BMN

#poll-notice

Glad its working, sounds like it may be a bad/cold joint or so, double check the board with a magnifying glass in good light and retouch any joints that look dry etc , but i am sure you know this anyw

#qcx

Hi Rob Can we take it that the RX side is working as it should and alignment went OK? What sort of power supply are you using, its not current limiting is it, have you measured the supply current on R

#qcx

Hi Bernie Please don't try and cut the 'link' for JP7, the only time you would cut any of the links is for fault finding. JP7 doesn't have a link to cut , both parts of JP7 are on the same copper pad

#enclosure #manual #case

The only problem with JP7 is that it cant easily be cut for isolation if your trying to fault find, this track problem will not in itself cause any problem other than that. for those that haven't buil

Just finished my 50Watt amp and glad to report worked first time, A couple of questions to other builders of the amp. The LEDS, are yours like lasers? Who needs lights in the shack Hi, I am thinking o

Hi Jim /Julian OK on the center Tune indicator, i hope its ok to post a llink here but its easier and everyone that wants it can get the info then, On my web site www.phoenixkitsonline.co.uk I have a

Hi Dave and all I am sure you will get your running just fine, just take your time, the group here and Hans are very helpful if you run into problems. I have fitted a CW Centre tune indicator to mine,

Hi all , very happy with my new QCX+ , I need a new volume control so for now I have bodged a old one for now. I have just compared it on the same signal to my FTDX1200 and I am very happy with its pe

Its Finished! working 100% After a long time tracing and fault finding i had two problems, the first was a problem with TXCO module, Hans is sending me a replacement, due to that i spent days going th

Hi Ron / All I have a simple scope and I have looked at the waveforms as shown in the guide , all look good but i can only see one output at a time (single channel Scope) to check the phase you need t