by Rajesh Kakkad | Jul 22, 2022 | Amateur Radio Theory
Class C Amplifiers You will recall that most AF amplifiers use cathode bias. The audio amplifier tubes are operated ad Class A or Class B, because we are interested in obtaining good fidelity. The Class A amplifier sacrifices efficiency for fidelity. In the case of an...
by Rajesh Kakkad | Jul 22, 2022 | Amateur Radio Theory
Introduction Nickel-Cadmium batteries can save much time and money when they are used to replace other non-chargeable dry batteries. They must however, be treated in a suitable manner or they could become useless within just a few weeks. I have had many people come to...
by Rajesh Kakkad | Jul 22, 2022 | Amateur Radio Theory
Primary Cell: When dissimilar materials like zinc and carbon(or copper used in place of carbon)were immersed in a bath of acid solution(suphuric acid diluted in water), chamical action produced an electromotive force between the zinc and the carbon. The materials...
by Rajesh Kakkad | Jul 22, 2022 | Amateur Radio Theory
When a diode is connected in series with other circuit components, current can flow in only one dirction in all of these components. This characteristic makes the diode a useful device for “rectifying”, or converting AThe diode vacuum tube has only 2...
by Rajesh Kakkad | Jul 22, 2022 | General
Knowing what a diode is, or how a triode works is of little use unless you have some practical knowledge of how it can be applied within a circuit. We are going to begin with a VERY basic schematic of an early transmitter. When ever we are looking at a schematic...
