The Tegam 1870A combines the temperature stabilized feed-through type bolometer standard/splitter in a convenient companion unit to the 1805B RF Control Unit. The 1807A provides additional mechanical stability for the power standard test port, and facilitates the use of torque wrenches for even greater precision. A slide-out tray, located in the bottom portion of the 1807A, provides a stable work platform when calibrating the system with a Tegam M1110 terminating mount. Other sensors can be supported for safety with blocks or a lab jack as well. The Tegam 1807A and 1805B units may be ordered as shown in a bench mount configuration, or with rack mounting kit number 1919 for standard rack mounting.