The Tr-PS-3 is a regulated bipolar power supply that puts out +/-12Vdc @ 750mA. It uses an LM317 for the positive output and an LM337 for the negative output. The Tr-PS-3 PCB is only 6" by 3.2 " and, like all GlassWare PCBs, is extra thick (0.094 in), US-made, with heavy 2-ounce copper traces. The rectifiers used are ultra-fast MUR410G types, each of which are shunted by a 0.1µF ceramic capacitor to reduce RFI creation. The power supply can be used with either 115Vac-120Vac wall voltage or with with 230Vac-240Vac wall voltages.
A rotary switch for phono playback that presents three positions: mono, mute, and stereo. The signal leaves the phono stage and enters the Stereo-Mono switch's PCB. Since the rotary switch is a shorting type (a make before break type), there are no popping sounds between clicks. Kit includes the PCB, rotary switch, and several pairs resistor values to choose from, either carbon-film or metal-film types.