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I use Pulsonix, a rather expensive package. I get it free in return for beta testing it when it was being developed and running the users' group. It was developed from Easy-PC which I used for many

I happen to use EAGLE, because I had (and still do) a hobby license.? That practice ended starting at 8.0 when Autodesk bought the program and the program bought the farm. Since I detest the idea of

Hi, I use DipTrace. They have different purchase options including free. I have used lots of Schematic Capture/PCB Layout and Simulation packages over the years and I purchased a full functionality,

For historical reasons, I use the gEDA suite and it works pretty well. I just made up a VHF amplifier using it and JLCPCB. Using the slower shipping option, it was something around $10 for 5 boards

Ok, I'm sure you speak the proper English, we will just have to agree we use different words for the same thing. Instead of piles we would say layers. But having multiple sections on the same form, we

Mikek I did say PILES, piles are produced when things ( wires) are layered on top of others, that is pile winding. Pies are baked pastry encased food. My callsign ( G8LCO) tells that I am in England

To add to this, easyeda.com is OK as an online site for PCB design if you want a cloud solution/to collaborate. I prefer KiCAD though as I need to integrate it with FreeCAD for the case design. You

KiCAD. Free, open-source. Incredibly capable; great support crew; moderate learning curve. https://www.kicad.org/ Diptrace. I've not used it in years, but it was fairly easy way back when. I don't

I have made pcbs with software but it has been many years since I last used a program. I want something that will do surface mount as well as through hole. Fast learning curve is a big plus! Also

Getting to late for me to think, but how can you calculate the Q if you don't consider all of the resistance (11MΩ and CpRp of 9.484MΩ) across the capacitor? Probably just two ways to do it, and I'm

Attached. C1 with capacitance and Q (0.4pF and 45) is replaced with C1 capacitance (0.4pF) and R2 parallel resistance (10.53Mohm). Value for parallel resistance was computed a few emails back: Notice

Maybe I'm biased, after spending 10 days trying to figure out why the Q meter reading was low. And the answer is because the self capacitance of the resistor is lossy and that loss is equivalent to,

I’m reading your observations about high Q measurements and calculations . This is very interesting. High Q is vey difícilt to measure. Q-meters was designed as a practical instrument to design

9,848,000Ω is Rp for the capacitive component of the added 11M resistor. It was much easier for me to understand by viewing the SimSmith model (attached again), where the capacitive component is

OK, I see it a little different. The parallel capacitance has its own loss resistance associated with it. I think you ignored that? 11MΩ = R1, ? Rmeasured or Rm= 5,190,000? Rcp = Loss resistance of

Yes, Per Steve's measurement, 11Mohm resistor has parallel capacitance of 0.4pF with Q=45. John KN5L

Thanks for all that Jacques. -- Thanks, Mikek

Mikek, ?? ??? ??? ??? ? It is my contention that on the Q meter that 0.2pf is resonated out, because after adding the resistor I need to retune to resonance. ?? ??? ??? ??? ?

Are we talking about the Q of the resistors self capacitance? Jacques Q was about 9 on his 10MΩ resistor according to the graph. Jacques, was your resistor a 1/4W through hole or smd? -- Thanks,

Using SimSmith, as shown in yesterday's post. Adjusted CpQ such that Q-meter model measured Q=634.62 is a close match to Steve's measured Q=635 John KN5L