**Untested.l, functionality unknown
Vintage Antique 1930's Radio Co. Impedance Bridge Type 650-A
"Impedance bridges compare electrical impedances, which may contain inductance, capacitance, and resistance.
They use a method similar to that employed by Wheatstone bridges, which use a four-arm bridge circuit to compare an unknown resistance to that of a known standard."
*The Type 650-A was introduced in 1933 and was popular based on its flexibility and utility. The 650-A was one of the best-selling instruments by the General Radio Co!!!
Rectangular wooden case with sloped top; black instrument panel on top surface; instrument panel features six connection posts for the external generator, a galvanometer meter under glass, nine black plastic knobs, four of which are mounted on metal scales, and five other metal connection posts along the right side and bottom; above the instrument panel is a wooden lid fastened by two screws; underneath the lid is an empty storage area; a black metal handle is on the top side of the wooden case.
Thanks for considering this awesome vintage piece of history!
We ship within one business day and always shipped with care
**International shipping available for an additional cost
Dimensions for shipping 20x14x12
Chipped Tooth Repair 5gm Kit for Cracked or Broken Teeth with Instructions
Accuvein AV400 for Parts Or Repair
Yokogawa OR1400 Oscillographic Recorder - 8 Universal Units - For Parts/Repair