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.
A ring modulator is an electronic device for ring modulation, used for amplitude modulation or frequency mixing. A ring modulator may be used as an effects unit (See #Use in music). It is referred to as ring modulation because the analog circuit of diodes originally used to implement this technique took the shape of a ring.