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Greetings, I have finished a QCX 20. No problems with display, startup, or xmt/rcv. However, there is a terrible loud clacking sidetone while transmitting CW. This is present in either straight key or

It is not only USPS who have been known to have difficulties. My son once sent a small parcel from one UK address to another via the Royal Mail Tracking Service. When it did not arrive, he made

[Off topic]? ?Last week, I offered some MPS751 QCX keying transistors on eBay (253365000915).? ?Monday, being Martin Luther King Day, the post office was closed so after purchasing postage on-line

Jack, How did you measure that? The built-in meter will not read correctly here even if there is no output it can show a reading. Good Are you sure? It should be 0V RX and 12V+ when in TX mode. This

Werner I think Steve is quite right about the RF getting into the radio. I reported the same problem about a month or two ago with my QCX 80 and thought I had messed up. I am also using an end fed

Hi, I'm sure others will jump in with tips, but for a start make sure you don't have short between the antenna inner pin and outer. Then check you have continuity between the inner pin and one side of

On Tue, Jan 23, 2018 at 06:10 am, Werner Stoeckli wrote: > > .

Hi Steve I am using a simple 8 m wire and an 1:9 UNUN. All with a matchbox. Let me try with a normal dipole and let‘s see. I think you are right with your estimation. Currently the 8 m wire is only

Hi Werner, ? My first thought is that RF is getting into the radio from your antenna/feed line, making the keyer go crazy. Maybe from a too close antenna, end fed or similar. What is your antenna

Thanks Norbert. I built a Bayou Jumper Kit and found an open molded inductor. I'll pull one end out ot the board this morning and check them. Jack, NI8N wrote:

Hi Guys When transmitting into a 50 Ohm dummy load, then keying works pferfectely. But as soon as I send into the Antenna, the keyes starts to become crazy and generates himself undefinable signs. Can

Thanks all for your help, I can now get the same achievement as Tristan. I take the opportunity hereby to highlight the perfect service and quality of delivery of QRP Labs (Hans, G0UPL), very FB ! 73,

Graham, As I vaguely recall from 2+ months ago, I only scrolled down to the Ref. Frq. parameter and changed it from 27,004,000. to 10,000,000.? I guess one could call that a factor of 2.7, but it was

Hi! I had a similar issue and solved it by replacing the L5 and L6 100uH inductors.? 73s Norbert

I now have my QCX up and running and nicely boxed up. I have a U3s with OXCO and GPS which I use for WSPR and reports indicate very good stability with negligible drift. As the QCX has a beacon

Hi Tristan,There is alot to be said for just using PI4, both GB3CFG on 70.027 and 1296.905 MHz use this,cheersGeoffGI0GDP

Hi All, Just finished my 30 meter QCX.? The receiver and all the menu functions work fine, but there is no power out in transmit.? I pulled L1, L2, L3, and L4, recleaned the tips, resoldered them on

Paul glad you found your trace issue.? now to get this receiver to work very well -- that IQ calibration is vital.? I just emailed another builder on the same topic - perhaps both of you have

Heinz your statement of IQ balance being broad deserves more attention than given thus far !? the adjustment of the capacitor is a bit broad, and is less vital to the receiver working well - except

Hi Ga?tan Im currently seting up the GB3SEV/B here in the UK . It very much early days, however my progess and a 2 min cycle is here -?https://youtu.be/ju2bjui6OEc Cheers Tristan M0VXX