Are HT leads ignition leads?
Alternatively known as a high-tension (HT) lead or spark plug wire, an ignition lead plays a vital role in an engine’s fuel ignition system.
How can you tell if a resistor is working?
Measure the resistor with on ohmmeter. Turn all power off the circuit and allow any capacitors to discharge. Test your ohmmeter to ensure it is working first. Remove one lead of the resistor from the circuit and measure it with an ohmmeter. Compare your reading with the expected value. This is the most accurate method.
What to do if your HT lead is stripped?
If the thread is stripped, it’s usually possible to tap the hole next size up and make some new over-size screws. Make a short piece of bar, drilled and tapped to suit the thread size. Then counter bore to hold a cheese head screw so that the end of the screw protrudes through the end of the bar.
How do you identify an axial resistor with a picture?
Axial resistors are cylindrical with leads extending from each end. Look at the resistor so the group of 3 or 4 color bands are on the left side. These are sometimes followed by a gap, then an additional color band.
Can you test HT leads with a multimeter?
You can check the resistance end to end which will tell you if the bit in the middle has broken, it won’t tell you if the insulation has failed and is earthing out somewhere when used in anger. You can sometimes see that if you watch them running in the dark though. Unless there’s an actual break in the lead then probably not.
Where are the resistors on a grid stopper?
The 1.5K grid stopper was mounted between pins 1 and 5 with the wire from the board connected to pin 1. Put the resistor down close to the insulating base. The 470Ω /1W screen resistors were mounted between pins 6 and 4 with the wire connected to pin 6.
What happens when a screen grid resistor is un-bypassed?
If the Rg2 is un-bypassed (as most screen grid resistors are) then the larger the Rg2 resistance, the more compression you will end up with in the g1 curves. (i.e. more compression = decreased transconductance).
How to tell if a resistor is on a circuit board?
Surface mounted resistors are rectangular in shape with leads that extend from opposite sides or the same side and are bent downward for mounting on circuit boards. Some resistors have contact plates on the bottom. 2 Read the 3 or 4 numbers on the resistor.
Axial resistors are cylindrical with leads extending from each end. Look at the resistor so the group of 3 or 4 color bands are on the left side. These are sometimes followed by a gap, then an additional color band.