The HD (tm) Regulator. Identified by a HD (circle R) on the Stator plug and H-D on the rubber grommet where the three wires exit the regulator case. Only other markings were 3135 and 16P90. I presume the 90 to be a date code. The PC board was marked Tympanium Corp. A number code of T-1132 was also on the board along with the backwards RU symbol which is a european version of our UL. As for the skuzmatic I didn't wana waste the time on a stinkin CAD machine so I winged it by hand. It don't look to bad but the scan process sucks. In GIF it's about 33.2K somewhat full screen. The only illegible or confusing parts are two 3.3K resistors. They look like 33K to me!! and I drew the thing. The .04's are decoupling caps ~50 volters I'd guess. Ok. Here`s the parts list. For those of you who really wana dig into it, I crossed the list to the ECG listing. Skuz # Manufacture Type ECG Description Q1 MPSA56 159 PNP 1 amp Q2 2N5062 5402 SCR 0.8 amp Q3,4 2N6505 5552 SCR 25 amp D1-4 ?????? 5812 Diode 20 amp 200V D5,7,8,10,11 1N4004 116 Diode 1 amp 600V D6 1N5242B 5021A Zener 12V 1/2 watt D9 1N5252B 5031A Zener 24V 1/2 watt The Bridge Diodes, D1-4 were spot welded to two brass buss bars. These were the + and - sides of the bridge and were heat sinked to the regulator case. The - was not electrically insulated. From the ECG specs, this arrangement is required for the AMPS. I would imagine if space was not an issue, stud mounts would do fine. Any ???? or comments, feel free to E-mail me at; gagliano@huey.rel.semi.harris.com Thanx and enjoy.