Raham 481B Isotropic Wideband Electromagnetic Radiation Hazard Meter w/ Probe 83
Previously used condition - tested by previous owner.
Previous Owners Notes on this item:
"RADIATION HAZARD METER
MADE BY GENERAL MICROWAVE MODEL 83 WITH 481B INDICATOR
AS I GOT IT, THERE WERE TWO 4.2V BATTERIES MARKED MB-133, BUT GOOGLE
SEARCH SHOW NO SUCH THING.
THIS ONE COVERS 300MHZ TO 18GHZ, [CALIBRATION] CHART IS UNDER THE METER.
METER RANGES SAY 2 mW/cm2 AND [Additional Switchable Ranges] 20 [and] 200.
I USED NICDS, THREE IN SERIES TO PRODUCE 3.6V AND TESTED IT. PUTTING
PROBE CLOSE TO THE KITCHEN MICROWAVE OVEN. IT SHOWED SOME METER DEFLECTION
SO I ASSUME, EVERYTHING IS WORKING OK.
original battery says mb-133 battery replaces T133,TR133,E133
Alkaline battery called TR133 is available but pricey...
Exell E133 4.5v alkaline battery also known as A21PX,523,EN133A,PC133A,PX21
price around $8ea"
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Most of the parts we sell are vintage New Old Stock parts.
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NOS (New Old Stock) parts are Genuine Factory Original parts.
NORS (New Old Replacement Stock) parts are original vintage aftermarket parts.
NOS and NORS does not necessarily mean the parts are perfect.
Manufacturing technology was not the same as it is today so imperfections should be expected.
Also, these parts may have been in storage for 40-80 years and could be dusty, greasy or have surface rust, spider webs, etc.