User manual HARBACH ELECTRONICS PM-200

[. . . ] PM-200 POWER SUPPLY MODULE INSTALLATION INSTRUCTIONS PART S SUPPLIED WITH T HIS KIT : (1) PM-200 P ower Supply Module Circuit Board (1) 15K ½W 1% Resistor To start the installation, read these instructions very carefully. Unplug the amplifier and remove any input, output and control cables that may be connected to the back of the am plifier. Remove the chassis from the case and remove the perforated sheet m etal RF shield from the top of the chassis. [. . . ] You may have to carefully pry it loose with a sm all screwdriver because of paint stickage. Place the front panel down in front of the chassis. Lift the circuit board from the front so that it tilts upward about 1". Using diagonal cutters, cut the old circuit board from the front left corner all the way back to the wire hole. This will break out a path for the wires to exit. Be careful not to cut any wires during this process. This will free the old circuit board so that is can be removed without further unsoldering of wires. Carefully work the old circuit board out of the c ompartment and discard it. Take the n ew circuit board and work it into position with the wires passing through the slot in the board. Secure the board on the right side with 2 or 3 of the 6-32 x 3/8" screws, washers and nuts. 1 () () () () () () () () () () () () Rein sta ll the YELLOW and GRAY wires in their marked holes in the circuit board and solder. Swing the front panel back into position and reinstall the (4) 6-32 x 3/8" Phillips-head screws, washers and nuts. Reinstall the 3 control flat washers and nuts and tighten. W ith the amplifier on its side (transformer down), install the remaining 6-32 x 3/8" screws, wa she rs and nuts holding the circuit board in place. Put the RED and RED & YELLOW transformer wires through their appropriate holes in the circuit board and s older. Locate the 2-lug term inal s trip just to the rear of the new circuit board. [. . . ] Rein stall the tubes and the perforated sheet metal RF shield on the top of the chas sis and put the chassis back into the case. () () () () () () () () () () () () This c om pletes the installation of the PM-200 pow er supply module. It will provide you with a better power supply that provides the necessary B+ filtering and regulation. Your am plifier should not experience any power supply problems in the future. HARBACH ELECTRONICS Jeff Weinberg ­ W8CQ 468 County Road 620 Polk, OH 44866-9711 (419) 945-2359 http://www. harbachelectronics. com info@harbachelectronics. com 2 PM-200 POWER SUPPLY MODULE PARTS LIST D1 ­ D8 C1 ­ C6 R1 ­ R6 R7 R8 R9 R10 R11 ­ R24 1N5408 (3A 1000 PIV) 140µF 450VDC 2-82k 3W IN PARALLEL 910 2W 5% 3. 6K ¼W 1% 1 3W 1% 15K ½W 1% 1M ¼W 1% IN SERIES 3 SB-200 POWER MODULE AND SOFT-START UNDER-CHASSIS WIRING AND PLACEMENT 4 [. . . ]