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I think both L5 and L6 is to filter and keep the noise out, so for a test you should just jumper the faulty one as a interim solution. I should think Hans have spare ones but the post will take it's

Hi Alan, I measured voltages with a multimeter, PK Precision #389. I had suspected one or both of the molded inductors were "open, since I had that problem with the Bayou Jumper Kit. So I unsoldered

Hi Robert, Assembly manual has a comment under set up menu item 4.9 regards side tone level adjustment. You can use this parameter to reduce the volume of the sidetone audio. Most people will find the

see message 20142 and associated responses. Jerry KI4IO

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