Heathkit IP-2718 Tri-Power
The top is on “backward” and the Black Chassis ground screw on banana socket cover is missing. There are some slight scratches plus what’s left of some tape glue on the upper right corner of the front panel. The METER switch is not physically positioned properly as seen by the METER knob set to 2 o’clock at the full CW position. The “B” control/RED trimmer pot knob has some “White” junk which needs to be removed. The meter appears to be okay but needs its mechanical zero adjusted.
The back is in very good condition. Nothing wrong back here. The 3 wire ground power cord is in excellent condition, no cracks or breaks in the insulation covering and the 3 plug pins are straight, not bent.
Pulled the cover off to inspect the internal components and PC board. There does not appear to be any problems from overheated components. The RED and BLACK wires hanging over the front panel are the supply’s original meter + and – wires. During initial testing of the supply, the original meter sticks and does not rise to FS with both “A” and “B” maximum 20VDC output. Meter pot adjustments did not bring the meter to FS at 20VDC output. The original meter is 50 ohm at 1MA FS. I have a smaller 50 ohm 1MA meter I used to test the meter circuit (see next picture).
This shows the spare 50 ohm 1ma meter connected to the supply’s meter switch wiring with simply jumpers. Supply is not powered up.
I powered up the supply, connected my DVM to the “A” output Banana sockets, the adjusted the supply for 10VDC output. The smaller meter indicates a 12 o’clock 10VDC output. The original meter, at 10VDC output, is at “12 o’clock” so the smaller meter is working properly. Although not shown in this picture, I adjusted both “A” and “B” supply controls for maximum 20VDC output, the smaller meter, at maximum output, was at “FS” which is what the original meter would be with +20VDC output. Therefore, the supply’s meter circuit and supply are working properly.
Here’s the DVM showing 10.02VDC output from the IP2718 supply. The supply is working as it should, possibly a problem with the 5VDC switch setting but the basic supply is working as it should. Not bad for $30 plus shipping. I’m currently looking for an original meter for replacement.
