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 was $625 in 1960 versus, for example, $1000 for the [[516]] in 1960.


Due to is its low bandwidth, the 503 can operate at high sensitivities while not responding to interference from  
Due to is its low bandwidth, the 503 can operate at high sensitivities while not responding to interference from  

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