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720-A: Difference between revisions
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The '''General Radio 720-A Frequency Meter''' was introduced in {{Catalog K4}} and remained available through {{Catalog P}}. | The '''General Radio 720-A Frequency Meter''' was introduced in {{Catalog K4}} and remained available through {{Catalog P}}. | ||
The Type 720-A is a heterodyne type frequency meter using a calibrated oscillator from 100 to 200 MHz. Using harmonics frequency measurement from 10 MHz to 3 GHz. | The Type 720-A is a heterodyne type frequency meter using a calibrated oscillator from 100 to 200 MHz. Using harmonics frequency measurement from 10 MHz to 3 GHz are possible. Using a built in antenna to couple the unknown a zero beat can be obtained and monitored. The beat note is displayed on a panel meter and heard with an internal speaker. The 720-A can be powered by Burgess 6TA60 battery or the Type [[1261-A]] power supply. "Bias Cells" provide grid bias potentials B1 and B2. See "Bias Cell" information below. | ||
==Specifications== | ==Specifications== | ||