152 mm 3RB30 VHF Radio Jammer Cargo

ammunition generation, it is issued together with a choice of three preloaded cartridge cases of varying lengths containing the variable propellant charges. The complete rounds are combined under the designation 3VRB38. There is also a Full Charge and a Reduced Charge. This 3RB30 projectile was developed as part of a joint Russian-Bulgarian association. The 3RB30 round appears to have been the result of the Russian part of the association, the Bulgarian contribution being the rounds for the earlier series of 152 mm artillery pieces (see following entry). There are equivalent Russian projectile and rounds intended primarily for firing from D-20 and 2S3M howitzers. The projectile remains the same as for the long-barrelled howitzers but only two propellant charges and rounds are involved. The Full Charge round is the 3VRB37 and the Reduced Charge round the 3VRB38. Ballistic performances will vary accordingly. Description As with other rounds in the 152 mm family, the 152 mm VHF Radio Jammer Cargo Projectile 3RB30 is a separate loading munition. It uses the same carrier projectile as the 152 mm ICM 3-O-23 (see separate entry in this section). The steel carrier body has relatively thin steel walls, a long streamlined ogive, single copper drive band and a base unit with a hollow boat-tail outline secured to the base. The interior contains a single VHF radio jammer body which is ejected through the base when the nose-mounted time fuze functions at the preselected time igniting an expulsion charge inside the ogive. The jammer body will then be ejected to fall to the ground, stabilised in flight by four tail-mounted pop-out fins. This ensures the jammer body falls nose first, so that the nose spike enters the ground allowing a folded antenna to unfurl upwards from within the rear of the tail unit. There are seven ready-loaded jammer bodies to choose from, covering a frequency range of 1.5 to 120 MHz; 3NS30 projectiles are apparently issued in sets of seven. Each VHF radio jammer transmitter body weighs 8.2 kg and can transmit jamming signals over a radius of 700 m for 1 hour. The cartridge cases involved with the three propellant charges are lacquered steel with a KV-4 percussion primer in the base. No information is available regarding the weights and types of propellant involved although it is known that there are three charges available, the maximum possible range being 22,000 m. Authorised fuzes MT - type not specified Equivalent projectiles BULGARIA Marketing agency Kintex Type: 152 mm VRS-546 VHF Radio Jammer Cargo Projectile Description: See following entry VERIFIED BULGARIA