The TR-7 Service Kit consists of 13 extender boards, a jumper board, and three tuning tools to facilitate the repair and maintenance of the R.L. Drake TR-7 Transceiver. The extender boards are used to elevate printed circuit boards above their compartments to provide access to each side of the circuit board for troubleshooting. Since some circuit boards use more pins than the longest extender board, it will be necessary to assemble several extender boards to accommodate all of the circuit board pins. The jumper board connects the TR-7 translator board and the digital control board together. The jumper board is required in TR-7's that have a DR-7 installed, and it allows the TR-7 to operate after the DR-7 has been removed. The DR-7 must be removed to gain access to the front half of the TR-7. Three tuning tools are provided so that adjustments can be made to variable resistors, capacitors, and inductors in the TR-7. Refer to the TR-7 Service Manual for all adjustments and technical maintenance.