Item #154: A Leeds and Northrup decade resistance box;
8" x 8" x 5" walnut box, Bakelite top; 0 to 9,999 ohms; 0.1% precision.
Leeds and Northrup manufactured the highest quality
electronic test equipment. This box was acquired from the
estate of a Radionics practitioner.
Compare the construction quality with that of a Reflexophone, below.
What Dr. Abrams supplied for the same dollar.
Close up of one of the decade resistance switches.
The contacts are made from solid precious
metal and do not tarnish.
A resistance element showing the non-inductive winding.
Radionics practitioners claim it is actually the parasitic inductance
of the poorly designed and made Abram's boxes that is the source
of their efficacy.
All details are of the highest quality. The 'click' for the
knobs is provided by machined slots in a brass disk riding against
a spring loaded ball bearing.