There are many useful antenna design programs on the Smeter web site that I used to use. Unfortunately, they don't run under 64 bit Windows 10. I tried installing vDos but can't get them to execute

Checked this morning and now at the moment 1.03b appears to be giving the correct sidereal time according to http://www.jgiesen.de/astro/astroJS/siderealClock/ . 73 Alan G4ZFQ

Good Evening Hans, I notice quite a few of the US hams that don't seem to be able to reprogram their QCX and Clock chips. I have a nicely working programmer here in Park City, KS and if you approve

OK Hans, thanks for the update. Still working on finishing assembling the kit and will for now test firmware chip c1.03b with the sidereal clock when powered up. Will know immediately if the LST is

When the weather is better, I will set up the laptop and GPS in the car. Ask the XYL to drive at a constant speed on a straight road and then check the NEMA sentence. With the current

Geoff, As this is an exact junk box copy of the QRP Labs clock it must use RMC. However, I must recheck, I have discovered the GPS I'm using is also outputting VTG which may be confusing the logic? I

Hans: If you could spare one of the boards, I would be happy to characterize the individual inductors and report the results. Another potential disadvantage (from experience), the control

Hello Arv, Tuesday, February 18, 2020 I would love to see the engineering drawing of one of these, putting a sprung loaded wiper inside a 2.1mm barrel or on a 2.1mm pin sounds tricky! Or do you mean

Hi all, built my first QCX (40 meters) over the last few days. PCB is Rev 4; firmware is 1.00g. Did the alignment according to the manual 8.7 BPF peak; 8.8 I-Q bal; 8.9 Phase Lo; and 8.10 Phase

Mike, Ignore everything above IC10-6 IC10-6 should be 6V, suspect a bad joint on R39/40 or bad C24 (wrong way round). Without looking too carefully the rest apart from those affected by that seem

Hi everyone, Hoping someone can help me out with an issue with a new 40m QCX build. Description of Problem After building the radio, I performed the alignment steps and was able to find peaks and

Hi JP What could dramatically reduce the size... the planar PCB-wound inductors? I don't think so. Probably equivalent planar inductors are LARGER not smaller. A very nice property of toroids is that

Guido, Pascal, Justin, Hans and others, This could dramatically reduce the size and space that switching BPF/LPF could take up. I am interested in this to see if this technique could be applied to

Hi Justin, Was it addressed to me? If is, then: Flat spiral coil Inductor http://www.tesla-institute.com/!app/sim/fscic.php Single layer planar spiral coil

Hi That's a very good question. At first I thought it was not a good question - since people have complained about the week day, not the sidereal time - and I did not change anything about the

Does this have any effect on the sidereal clock performance?

Myself I would not use them for anything over 10 amps and 99% are coming out of Chinese I myself I use Anderson Power poles... -- ED W2ELM

neat transmitter board, is there information available to calculate those inductors for other bands? might be a fun project to layout boards for each HF band or maybe configuring it for a pair of IRF

Alan, which NEMA sentence are you using to get the speed data? Can you look at the NEMA output on a dumb terminal program such as Tera Term or Hyper-term which will show the raw data. Check

Ron, Happy I don’t need to remove the trim pots. My original complaint was the Si5351A error msg. After re soldering many connections, that msg is rarely seen. I will re-attempt alignment & hope