It is quite intriguing that most virus capsids are either icosahedral or helical in structure. Presumably, these two structures were the ideal structures to protect a viral genome and accessory proteins within a virus particle.elical Capsid. Helical capsids are usually formed from one protein that interlocks to form a helix-like structure around the viral genome. They are usually more common among viruses that infect plants, though influenza, measles, mumps and rabies viruses all have helical capsid structures.
1 RF modulator converts AV to RF channel.  Consumes 9 VDC input voltage and offers Antenna interfaces/ports for reliable transmission.
Now there are three different ways that the microphone and its modulator can be connected in circuit. The Radio Amateur's Hand Book A. Frederick Collins As the magnetic modulator does the same thing a vacuum tube used as a modulator is not needed where the former is employed. A minute force becomes the modulator of a much greater force, and thus from imperceptible becomes conspicuous.