7011 (TBR-111) VHF Transceiver
This 7011 transceiver was developed in late 70s, as part of 7010 series. It is designed to equip PLA infantry reconnaissance units. The series has three machines: 7011 VHF transceiver, 7012 direction-finding receiver, and 7013 subcompact transceiver. It saw intensive action during Sino-Vietnam border conflict in 80s. It retired from PLA unit in late 90s shortly after it received its new code name of TBR-111.
7011 is a VHH FM transceiver with 8 fixed channels (Channel 1, 40.140 MHz; 2, 40.275; 3, 40.500; 4, 40.770; 5, 41.085; 6, 41.229; 7, 41.388; 8, 41.709 MHz). It is an odd frequency arrangement; since it makes it is not compatible with most of other VHF radios in PLA at that time (other than 705 radio which covers 36.0 – 46.1 MHz). Unlike other VHF radio in PLA, this one could transmit and receiver in different channels. It also has a coded transmitting mode which could transmit a coded signal (three different codes selectable) so that a 7012 receiver could find the direction of the signal resource.
Like 884 radio, this 7011 also do not have a volume control, not even a high-low control found in 861 radio. The headset is the same one for 81 Compact transceiver, the 1.5 meter antenna is the same one as that of 884 radio. It is powered by 10 12V NiCad rechargeable C size batteries (GNY-0.8), makes it 12 V total. With 1:3 transmitting/receiving ratio, radio could work 4 hours using GNY-0.8 batteries. The output power is about 1W. With a 1.5 meter antenna, the normal range is about 4.5 Km.
The radio itself weight 1.5kg without batteries and measure 190x120x72mm. My sample was made in 1979 by No.8301 Factory with a serial number of 79144.