WWII BC221-M WAVEMETER

Used for Calibrating wireless transceivers. 125KHz to 20MHz heterodyne frequency meter with individual calibration book and internal Xtal calibrator.
Basic accuracy better than 0.034% over temperature range. HS-30 type headset or similar required for operation.
Supplied with one spare set of vacuum tubes inside unit, some units in 1942 were supplied with two spare sets.
Manufactured by Bendix Radio Corporation. Suffix M

Your comments:

• I have all three models covering HF VHF and UHF.
  Plus a mains power unit on one of them.Very high build quality and as stated used in later years to meet GPO regulations for an amateur license.
  
  David G8JET
  
  .......... David, S.Humberside UK, 14th of August 2017