Properly wiring a Weston Vu meter bridge?

[outraged]

Hello, I have a quad vintage Weston VU meter bridge and I admittedly have never wired a VU before (therefore I am selling it).
Anyway's, I have someone who really wants these for there rig it but also has never wired a Weston Vu.

I've looked for schematic's without luck so I was wondering if anyone had any experiece wiring Weston Vu's and could give some basic insight into this? Thanks in advance

 

[outraged]

More closeup picture...

 

[Bill Wilson]

If they are connected to 600 ohm impedance line then put 3.6k ohm resistor in series with the high side of each meter.

 

[Martin Griffith]

Looking at the pic, there seems to be a + sign on the back, so can I assume that it needs an external bridge rectifire and 3K6 resistor?

 

[PRR]

The meter case was a stock item used for both AC and DC meters.

It is remotely possible it lacks a rectifier. Cheap "vu" meters don't. But it sure looks to be a classic VU Meter, which all had the rectifier built-in (designed for the right conductance).

It will be obvious. Without a rectifier, the needle will hang at the left peg, jittering on strong bass. To check, throw a 1N4007 in series, if it now works almost like it should, get a proper rectifier (not easy these days).