https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nbsspecialpublication300v3.pdf
has a few articles on potentiometers and volt boxes.
F.K. Harris's Electrical measurements (1952) has further information.
Bruce
> On 05 May 2018 at 09:36 Bruce Griffiths wrote:
>
>
> The volt box is likely to be a vol
The volt box is likely to be a voltage divider that was used to divide a
voltage to be measured down to a value within the measurement range of a L & N
potentiometer (not the 3 terminal component but the type that sets up the
current in a series string of resistors to a known vale by comparing t
Hello Dave.
So far I have identified 3 different Leeds & Northrup "Boxes".
Originally my intention was to re-purpose the box, panel connectors and
switch for a project to make my own precision resistor banks.
All use different switches and vastly different resistors to achieve
their original pu
On Mon, 30 Apr 2018, 20:02 , wrote:
> Leeds and Northrup Ayrton Shunt box Model 2664.
>
> Modified to do double duty as a precision resistor standard.
I must admit I don't know what the purpose of the original unit is. Perhaps
as part of a bridge given the galvanometer connections.
I know when
