51
edits
1141-A: Difference between revisions
Jump to navigation
Jump to search
m
Added missing conjunction
(→Links) |
m (Added missing conjunction) |
||
| Line 16: | Line 16: | ||
The {{Title|General Radio 1141-A Audio-Frequency Meter}} was introduced in {{Catalog L}} and remained available through {{Catalog M}}. It did not appear in {{Catalog N}}. | The {{Title|General Radio 1141-A Audio-Frequency Meter}} was introduced in {{Catalog L}} and remained available through {{Catalog M}}. It did not appear in {{Catalog N}}. | ||
The 1141-A is an analog direct-reading frequency meter "completely covering the usual audio-frequency range and extending somewhat beyond that range in both directions"<ref>"A Bridge-Type Audio-Frequency Meter", February 1948, General Radio Experimenter</ref>. It makes use of the Wien bridge circuit, along with an external detector such as a pair of high impedance headphones, to measure the input frequency. The operator selects the frequency range and turns the frequency dial to minimize the signal at the detector. The input frequency is then read from the range selection multiplier the setting of the frequency dial. | The 1141-A is an analog direct-reading frequency meter "completely covering the usual audio-frequency range and extending somewhat beyond that range in both directions"<ref>"A Bridge-Type Audio-Frequency Meter", February 1948, General Radio Experimenter</ref>. It makes use of the Wien bridge circuit, along with an external detector such as a pair of high impedance headphones, to measure the input frequency. The operator selects the frequency range and turns the frequency dial to minimize the signal at the detector. The input frequency is then read from the range selection multiplier and the setting of the frequency dial. | ||
The 1141-A may also be used as a band-elimination filter, or to measure total harmonic distortion. | The 1141-A may also be used as a band-elimination filter, or to measure total harmonic distortion. | ||