| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 5K30.00 | Transformers | | |
| 5K30.10 | wind a transformer | PIRA 500 | |
| 5K30.13 | salt water string | PIRA 1000 | |
| 5K30.14 | single turn transformer | Em-10 | Probes of an oscilloscope are slid along the ring of a single turn secondary. |
| 5K30.20 | dissectible transformer/light bulb | PIRA 500 | |
| 5K30.20 | dissectible transformer | Em-5 | Various cores are interchangeable with the Leybold transformer. |
| 5K30.20 | transformers | Disc 20-23 | Many variations with the Leybold transformer. |
| 5K30.21 | toy transformer | E-240 | Place a 110
V lamp in parallel with the input and a 6 V lamp on the output of a step
down transformer. Then place a auto taillight lamp in series with the input
and a 10 amp fuse wire across the output and increase the voltage with an
autotransformer until the fuse melts. |
| 5K30.22 | telephone and radio transformers | E-246 | Using commercial transformers in demonstrations. |
| 5K30.24 | magnet losses in transformers | AJP 54(6),528 | Additional cores are placed in the Leybold transformer to demonstrate the magnetic potential drop. |
| 5K30.25 | transformers | E-11c | High voltage, low voltage and demonstration transformers are shown. |
| 5K30.30 | vertical transformer | PIRA 1000 | |
| 5K30.30 | vertical transformer | 5K30.30 | Secondary loops attached to light bulbs are placed over the core of a vertical transformer. |
| 5K30.30 | vertical transformer | E-235 | Directions
for making a vertical transformer using 110 V AC in the primary. Includes
directions for step up and step down secondaries. |
| 5K30.30 | Thompson vertical transformer | E-11d | A vertical transformer is shown with a lot of accessories. |
| 5K30.30 | vertical primary and secondary coils | Disc 20-22 | The
vertical transformer is used with two coils, one with many turns powers a
110 V lamp, and the other with fewer turns powers a flashlight lamp. |
| 5K30.34 | autotransformer | E-238 | A variation
of the vertical transformer with 400 turns tapped every 50 turns and connected
to 110 V AC at 200 turns. Explore with a light bulb. See L-99. |
| 5K30.35 | light underwater | PIRA 1000 | |
| 5K30.35 | light underwater | 5K30.35 | The secondary coil and light bulb are placed in a beaker of water and held over the core of a vertical transformer. |
| 5K30.35 | light under water | Em-7 | A waxed coil and light bulb are placed in a beaker of water over a vertical primary. |
| 5K30.40 | weld a nail | PIRA 1000 | |
| 5K30.40 | weld a nail | 5K30.40 | Two nails attached to the secondary of a large low voltage transformer are welded together upon contact. |
| 5K30.40 | large current transformer | Em-4 | Nails connected to the secondary of a large current transformer are welded together. |
| 5K30.40 | dissectible transformer - welding | E-239 | Two "L" shaped laminated iron cores with interchangeable coils are used to step down 110 V AC to melt an iron wire. |
| 5K30.43 | simple spotwelder | AJP 36(1),x | Modify a heavy duty soldering iron to function as a small spotwelder. |
| 5K30.50 | Jacob's ladder | ref. | see 5D40.10 |
| 5K30.51 | induced EMF | Em-11 | An oscilloscope is connected to a wire in a gap of a transformer. |
| 5K30.52 | exploratory coil | E-234 | Explore an alternating magnetic field with an exploratory coil of many turns of No. 30 wire connected to a 6 V lamp. |
| 5K30.53 | mutual inductance on scope | 31-3.4 | The
relationship between the current in one coil and the voltage in another is
shown as a Lissajous figure on an oscilloscope. Diagram. |
| 5K30.54 | magnetic shunt | E-243 | An "E" core
has two windings: 110V primary on one outer, and secondary with a lamp on
the middle. Bridge a yoke over the windings and the lamp lights but when
put over all three it doesn't. |
| 5K30.60 | reaction of a secondary on primary | PIRA 1000 | |
| 5K30.60 | primary current change with sec.load | Em-2 | A light bulb in series with the primary brightens as the load on the secondary increases. |
| 5K30.60 | reaction of secondary on primary | E-241 | Connect a 100 W lamp in series with the primary and increase the load on the secondary to light the lamp. |
| 5K30.61 | reaction of secondary on primary | E-242 | Vary the load on the secondary and the coupling between the primary while observing the current in the primary. |
| 5K30.81 | shocker | Em-9 | A vibrator switches
the current in a primary and the victim holds onto the leads of the secondary
while the coupling is increased. |
| 5K30.84 | phony health belt | Em-6 | A weird antique health belt. |
| 5K30.90 | resonant Leyden jar detector | 33-3.2 | One Leyden jar with a loop of wire is driven with a induction coil, another similar arrangement is used as a detector. |
| 5K30.90 | Leyden jar and loop | A-8a | When a spark jumps from a loop of wire to a Leyden jar, a small spark will jump in a similar device close by. |