RBL, RBC, RAK

General radio test gear.

a general radio LP5 as the substitute German radar

Used as naval surface vessels and shore stations.

Max output:
A1 100Watts
A2 35 Watts
A3 30 Watts

weight 340 pounds...

The TBS series of VHF MCW/RT transmitter/receiver were manufactured  between 1938 and 1944 by RCA Victor, Camden N.J. Specifically, the model TBS-6 was released on Aug  25, 1943.

This set covered the 60 to 80 Mc range with a power input of 50 watts. Frequency control of both the transmitter and receiver was accomplished by crystal control. The operators who used these sets adopted the unofficial name  'Talk Between Ships'. Since the TBS operated  in a line-of-sight range, a belief prevailed that it was impervious to enemy interception, however, its use in the RCN was restricted to that of convoy duty during the war. Using the TBS in harbour was prohibited. Power to operate the TBS was derived from motor-generator sets. Primary power for these M-G sets was obtained from a variety of D.C. or A.C. sources, depending on what was fitted on a particular ship. The chief differences in the various TBS models were determined by the particular M-G set that powered the unit. Of special  interest, is the TBS transmission line. It was a concentric, 3/8 inch diameter, soft copper transmission line having an  impedance of 70 ohms. To purge the transmission line of entrapped air or moisture laden gas, the operator would open the valve on a 2000 psi nitrogen bottle and pressurize the transmission line to a maximum of 20 psi. The antenna fitted on destroyers was a quarter wave vertical with four horizontal rods to form a ground plane."

Thanks a lot to Jerry Proc VE3FAB for this info.

General use 1.5-12 Mc
VFO and 4 crystal positions.

serial number 1 

radiotelephone used for communications between ships.
550 to 1600 & 2100 to 2900 Kc
Output 11 Watt