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503: Difference between revisions
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There is a similar sister model, the [[504]], with single-ended inputs. A rack-mount version, the ''RM503'', | There is a similar sister model, the [[504]], with single-ended inputs. A rack-mount version, the ''RM503'', | ||
was also available. | was also available. | ||
The 503 features two identical phase matched amplifiers with true differential inputs. | The 503 features two identical phase matched amplifiers with true differential inputs. | ||
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Due to is its low bandwidth, the 503 can operate at high sensitivities while not responding to interference from broadcast transmitter RF fields, making it suitable for biomedical work. | Due to is its low bandwidth, the 503 can operate at high sensitivities while not responding to interference from broadcast transmitter RF fields, making it suitable for biomedical work. | ||
In 1960, the 503 cost $625 ($6,600 in 2024 dollars) versus, for example, [[516]] which cost $1000 (2024: $10,600). | |||
A large market for the 503 was in electronics labs of educational institutions. | A large market for the 503 was in electronics labs of educational institutions. | ||
The differential inputs are useful for entry level students to experiment with observing voltages not referenced to ground. | The differential inputs are useful for entry level students to experiment with observing voltages not referenced to ground. | ||