FM stands for Frequency Modulation. It means that the RF-frequency will change according to the input audio signal....
Amateur Radio Theory Articles
Double Sideband Modulation – DSB
Single Side Band – SSB – Part 2
Single Sideband Suppressed Carrier (SSB-SC): Single Sideband Suppressed Carrier (SSB-SC) modulation was the basis for...
IC 741 Tutorial
What exactly is an OPerational AMPlifier? Let's define what that component is and look at the parameters of this...
IC 555 Tutorial
The 555 timer IC was first introduced around 1971 by the Signetics Corporation as the SE555/NE555 and was called "The...
Valve Basic Theory
Basic Understanding of Valves: The vacuum tube, in its very primitive form, evolved from the light bulb. Invented by...
Voltage and Current
We have already discussed two terms VOLTAGE and CURRENT. Now it is time to discuss them further. VOLTAGE is the term...
Resistors in Series Parallel
Whenever we work with circuits in the real world, they are seldom as straightforward as a simple series or parallel...
Resistors in Series
Ohm's Law teaches us that Voltage is equal to the product of resistance and current. This is fine if we have a circuit...
Resistors in Parallel
As we mentioned earlier, there were 2 types of circuits, SERIES and PARALLEL. We have already gone thru Series. Now we...
Resistance
If water is moving through a hose, we say that it has FLOW. If we restrict the flow, by pinching the hose, we are...
Ohm’s Law
We have already discussed current, resistance, and voltage. Now we shall discuss the important relationship that...