Recent content by Fenster Karton

Nate, you need an idea of what you want to measure. Some rf imaging that let's you see heartbeat is mm. Very very high frequency.

Since there is sufficient CO2 in the atmosphere to absorb 100% of its lines, and has been all your life, what effect does more CO2 have besides second order effects?

when I first read this question I thought "It depends on the terrain and how many fat ladies".

not having a spring scale I can only comment re "feel" and as far as I can tell the outer iron doesn't affect much more than holding power, ie the last bit of travel.

I will post my findings.

The sum of the moments is made asymmetric by an elastic collision. I'll be finished building soon. No one has answered my question regarding the iron on the outside of the coil. I am assuming I need it.

It ejects nothing. You are jumping to conclusions.

I am building this. https://www.amazon.com/dp/B00BXWNG96/?tag=pfamazon01-20 How important is the iron on the outside of the solenoid?

I got some half inch thinwall PVC at the hardware store. The 3/4 PVC was crazy. The inside diameter was 15/16

You switch more than a hundred amps to start your car. Voltage is the sharp teeth unless you are thinking high current getting hot enough to burn.

It is not a coil gun. The power at the moment is a line operated variable power supply. It is a solenoid "hammer"

I think it needs iron on the outside. All the solenoids I look at enclose the wire.

I wound 4 layers on a piece of 3/4 conduit. The wire is 20 gauge (.032) and the coil length is 7 inches. I put 5 amperes into the coil and a bolt that fits the conduit didn't move. It stuck to one side of the conduit but it didn't snap in as I expected. What do I do to make this solenoid work?