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Re: How do you measure really high voltage...like for a spark plug.
Too bad this isn't 1960 and the Ed Sullivan show was on Sunday nights because the presenter is a much better comedian then engineer. His escapades would go over quite well with dancing bears and guys
By wn4isx <wn4isx@...> · #99906 ·
Re: How do you measure really high voltage...like for a spark plug.
https://www.youtube.com/watch?v=jqlqCIZ3Kfg
By fxkl47BF · #99905 ·
Re: How do you measure really high voltage...like for a spark plug.
I'll extract the coil to spark plug wiring for the 1998 Ford ZX2 so you can see what I meant. File shall be named "ZX2 Ignition.doc", a word document with embedded graphic.
By wn4isx <wn4isx@...> · #99904 ·
Re: How do you measure really high voltage...like for a spark plug.
1 - the Freon also provided insulation for the voltage divider resistors. When the Freon eventually leaked away, you could see the corona on the internal connections. 2 - the polarity of the spark (at
By Donald H Locker · #99903 ·
Re: How do you measure really high voltage...like for a spark plug.
A potential problem is the voltage also has to have enough current when the cylinder is at the top of the compression cycle and a voltage reading under "no load" might not indicate the voltage when
By wn4isx <wn4isx@...> · #99902 ·
Re: How do you measure really high voltage...like for a spark plug.
Hey guys, I¡¯m not sure after all this time if the group rules allow posting links to Amazon site. So I¡¯ll just tell you to go to Amazon and search for ¡°spark plug voltage tester¡±. You
By jong kung · #99901 ·
Re: How do you measure really high voltage...like for a spark plug.
Somehow the idea of using a HV probe that requires Freon cooling is a bit beyond the pale even for me! My Bird Termaline Watt Meter is rated at 60W, I mounted 2 4" 120V muffin fans against the heat
By wn4isx <wn4isx@...> · #99900 ·
Re: How do you measure really high voltage...like for a spark plug.
Back when I was doing automotive ignition system system development, we used a Tektronix HV probe, quite similar to https://www.bellnw.com/products/tektronix-p6015a It required a Freon charge inside
By Donald H Locker · #99899 ·
Re: Replacing memory back up cells with a super capacitor
I had a thought a moment ago, it is entirely possible the Panasonic capacitors Kenwood chose for their factory backup board were designed for ultra low leakage and normal supercapacitors might have a
By wn4isx <wn4isx@...> · #99898 ·
Re: analog feedback temprature regulator question
Hello, I ment as precise as possible 1C presition is cool too. I want to use feedback mechanism to regulate the temperature of a box. I want to do some fancy analog feedback like PID controller
By john23 · #99896 ·
Replacing memory back up cells with a super capacitor
We were discussing batteries a few weeks ago and I mentioned I used high value capacitors, AKA super capacitors, to replace the 3V lithium disk cell. I received an email asking for details. All of the
By wn4isx <wn4isx@...> · #99895 ·
How do you measure really high voltage...like for a spark plug.
I ran into a problem Monday, time for the first lawn cutting of the year, trust me, at 73 I don't even use a riding mower because the vibration would kill my artificial knees, our landlords are a set
By wn4isx <wn4isx@...> · #99894 ·
Re: logic of bjt regulator
Pull out your analog design books. This is a feedback loop.? The two NPN transistors are a differential pair.? ?I trust you know how differential pairs work.? The difference voltage between the
By Andy · #99893 ·
logic of bjt regulator
Hello, I am trying to understand the dinamics of the circuit taken from the youtube video. if we apply 2V DC the node 2 on the photo will be 1.4 (Vbe=0.6) The node 1 will expirience some voltage wich
By john23 · #99892 ·
Re: A downright amazingly stupid LED headlight, I'm impressed.
On Fri, Feb 28, 2025 at 11:35 AM, wn4isx wrote this about motorcycles: I have a theory about that.? Drivers instinctively use the space between oncoming headlights to gauge how far away it is.?
By Andy · #99891 ·
Re: analog feedback temprature regulator question
This is just a question about the question you asked, as I am unable to provide information about plans for a differential temperature regulator - I am unsure how to interpret "1Kelvin". Do you mean
By Andy · #99890 ·
analog feedback temprature regulator question
Hello, I am looking for a differential feedback temprature regulator project which explains the theory best it could and give practical example in simulation. I am looking to design a very precise
By john23 · #99889 ·
Re: Active Antennas
Another extensive active antenna link! Thanks! More reading ? Time allowing, I will build something. Right now, I got to take care of business as a priority so getting something that reasonably
By Bertho · #99888 ·
Re: Active Antennas
While I learned the required subject mator for my two degrees in university, the main thing I learned in university was how to research. It was a bit of a challenge to transition to the web but well
By wn4isx <wn4isx@...> · #99887 ·
Re: Active Antennas
Thank you wn4isx! Your link to Martin G8JNJ's active antenna pdf very extensive: https://qsl.net/l/lw7dfm/Antenas/Antena%20Mini%20Whip/MARTIN%20-%20G8JNJ%20- %20Active%20antennas.pdf More reading... I
By Bertho · #99886 ·