The handwritten numerals indicate that this is a prototype. Production
models would have neatly printed labels, of any.
The use of a single color (red) wire in a harness involving many wires
- suggests the wiring was done by someone with limited experience in
wiring (*not* an electronic engineer or a ham radio operator), probably
working on a limited budget. This is supported by the use of a plywood
The use of a commercial box for the assembly (the blue thing) suggests
an available source of some electronic supplies and a budget that isn't
The evidence seems to point to a one-of-a-kind project by a graduate
student, perhaps in physics or engineering.
I will not try to guess at the purpose of this device.
"3_Putt" <[Only registered users see links. ]> wrote in message
You have an 8 pole switch, 8 solid state relays (or full wave
rectifiers), a 5 watt power resistor (perhaps variable with 2
wipers which is odd in itself), AC on the front end shown (red
wires means AC at less than line voltage per NFPA 79), DC in the
background (blue wires), the background appears to be a DC motor
(or an electric hair curler). It appears to be a project board
as Tom indicated. The fact that there is strain relief built
into the red wires (in how they are dressed) tells me that
someone that worked in/for military built it (or at least part of