General Radio 1551-c Sound-level Meter - Vintage ~1961

US $1200

  • Mahwah, New Jersey, United States
  • May 28th
GENERAL RADIO 1551-C SOUND-LEVEL METER - Vintage ~1961 MFG: GENERAL RADIO COMPANY, Concord, MA BATTERIES NOT INCLUDED This unit requires: 2 - 1.5V D-Cells for the tube filaments 1 - 67.5V type B portable radio battery for the tube plates We were fresh out of D-Cells and we do not have a 67.5V B Battery . . . . . . therefore, to confirm operation we jury-rigged a couple of C-Cells . . . and clipped in an external adjustable power supply for the 67.5V. All battery checks and general operation have been confirmed. As can be seen in the photos, the inside of this unit is super-clean. Battery compartment and contacts look brand new. Photo doesn't show the battery clamping bar, but we have it. IET Labs now supports the General Radio product lines. A PDF version of the 1551-C Instruction Manual is available online from them for free. Just search on their home page for "1551-c instruction manual".

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