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Ryuji, I can not answer your question.? I am using a standard model for a?1N5369B 56-volt Zener.? That is not what I used to modify my QDX.? That was a 1n4756a a 47-volt device.? I do not have a

Awesome, thank you Evan. When you run simulation with Zeners, how much capacitance does your Zener model put on the circuit? (obviously, this is voltage-dependent)

Hi Stewart It does appear that your telemetry is being transmitted on minute 8 Dave VE3KCL 2023-09-17 19:58 0Y6TVK 14.097033 -10 0 NO64 0.01 ZR6N KG34 10886 236 W-2 2023-09-17 19:48 0Y6TVJ 14.097145

Ryuji, The advantage of simulation is that it is easy to do what-if analysis.? Here are the results you requested: RL14p=OPEN PW=3.75 watts VDp=202 volts RL14p=100 ohms PW=3.6 watts VDp=39

Your point of limitation coming from quantization is correct in theory, but the limitation is a non-issue for the question of simulating a tough load to the FET. No practical continuous variable

Virgin Media's email has been sh**e for years and years. I gave up using them for anything important in 2015 after they started dropping email for me they thought was spam. They didn't mark it as spam

Hi JZ This thermal mismatch problem manifests itself as the transistors heat This thread contains many interesting possibilities. But I'd still hesitate to elevate them to the level of "problem" or

Hi Stewart Please post the Basic program you entered into the U4B. Dave VE3KCL

Ryuji, Neither the tunable LC nor the ATU have any resistive component other than losses so the SWR they create is around the outside of the Smith chart at near infinity SWR. Using the ATU with some

Thanks Hans. Hans - The endeavor to build a "bit of kit" has me excited. To see you and 100's of hams actively tweaking out the QMX ... waaaaayyyy tooooo cooool. Thanks for doing what you do and glad

Thanks Karl.? I knew a few things - like scraping off the enamel first. But scooting the turns over 1st - b4 soldering the torroids in place ... good one! And yes, maybe a couple more test gizmos

Hi Karl, Mark > You won't have to worry about SMD since those are already on the pcb. You Yeah just do worry about not interfering with any of the SMD stuff already on the PCB, while doing the

Thanks for describing your simulation and bench tests. Would you be able to run a simulation with a parallel R on the RFC when you have a chance? Say 100 to 1k or something of that order, though it

I understand that desire but unless we know exactly what the network property of everything from the FET bonding wire to the BNC terminal combined, I can't tell you here use a load Z = R + jX to

Hello Milos Thanks for that, yes it sounds like a good way around it. It will save me having to set up 30+ new Message Rules in my OE Classic e-mail App. Cheers 73 Ian G4GIR

Reading this with great interest because I’ve been using PD supplies and 12v cables with my QDX and my QMX just arrived yesterday. I’ll have to put a scope on the cables as they’re plugged in to

I ran more simulations on the model I have from work with John Z.? I also adjusted the BV (breakdown) value of the BS170 model to be 1,000 volts instead of 60.? The model results were supported by

Oops, yes, 500mW, not mA, for the stock 5.6V zener and 5 Watts, not 5 Amps for the replacement 5.6V zener. It's good to know I should not be concerned with shutdown sequence. My shack 12V 30 Amp

Hi, I had a similar problem when I used my e-mail milos.soukup@.... I received and not received the e-mails from io groups in vawes. I discussed it with the provider and they asked for the logs

Thanks Bill Do I understand correctly that anyone with a Virgin Media account registered with IO.GROUPS will not get e-mails from IO.GROUPS? After 2 telephone calls with customer service, I cracked