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Telecom Milestones

TEST & MEASURING INSTRUMENTS

OLD  TEST  INSTRUMENTS

Test and Measurement Instruments collecyion,"Range-Doubler" KRT-500, EICO 430 oscilloscope, BC-221 frequency Meter

"Range-Doubler" KRT-500

Analog Multimeter

 

EICO  430  GENERTest and Measurement Instruments collecyion,"Range-Doubler" KRT-500, EICO 430 oscilloscope, BC-221 frequency MeterAL PURPOSE 3" OSCILLOSCOPE,
EICO  430  GENERAL PURPOTest and Measurement Instruments collecyion,"Range-Doubler" KRT-500, EICO 430 oscilloscope, BC-221 frequency MeterSE 3" OSCILLOSCOPE,

EICO  430  GENERAL PURPOSE 3" OSCILLOSCOPE

SIGNAL CORPS FREQUENCY METER  BC-221-AK 125 TO 20,000 KILOCYCLES

SIGNAL CORPS FREQUENCY METER  BC-221-AK 125 TO 20,0Test and Measurement Instruments collecyion,"Range-Doubler" KRT-500, EICO 430 oscilloscope, BC-221 frequency Meter00 KILOCYCLES.

It was used in the WW2 to calibrate radio communication equipment. The heart of the BC-221 is a crystal oscillator of 1 MHz.

 

This is a wood cased version. Other versions were with metal case.

 

Every BC-221 comes with individual Calibration Book with tables covering the full range of spot frequencies.

BC-221-AK  circuit drTest and Measurement Instruments collecyion,"Range-Doubler" KRT-500, EICO 430 oscilloscope, BC-221 frequency Meterawing,
SIGNAL CORPS FREQUENCY METER  BC-221-AK 125 TO 20,000 KILTest and Measurement Instruments collecyion,"Range-Doubler" KRT-500, EICO 430 oscilloscope, BC-221 frequency MeterOCYCLES,

NEW TEST INSTRUMENTS

Test and Measurement Instruments collecyion,"Range-Doubler" KRT-500, EICO 430 oscilloscope, BC-221 frequency Meter

DIGITAL MULTIMETER DT-830B

Test and Measurement Instruments collecyion,"Range-Doubler" KRT-500, EICO 430 oscilloscope, BC-221 frequency Meter
Test and Measurement Instruments collecyion,"Range-Doubler" KRT-500, EICO 430 oscilloscope, BC-221 frequency Meter

ADVICE P3030 Laboratory Regulaterd Power Supply

0-30VDC, 0-3.0A with CV and CC options

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