874-VQL: Difference between revisions
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{{GR Product | |||
|model=874-VQL | |||
|codes=COAXVOQUER,0874-9940 | |||
|class=coaxial components | |||
|summary=Voltmeter detector | |||
|image=GR 874-VQL Close-up.jpg | |||
|caption=General Radio 874-VQL | |||
|series=GR-874 | |||
|introduced=1963 | |||
|discontinued=1973 | |||
|designers= | |||
|manuals= | |||
* [[Media:GR-874-VQ datasheet 1963.pdf|General Radio 874-VQ Operating Instructions 874-0207-E 1963]] | |||
{{Catalog History}} | |||
}} | |||
The {{Title|General Radio 874-VQL}} is a "voltmeter detector" with two locking [[GR-874 connector]]s for the signal, and a non-locking GR-874 for the rectified output. It was introduced in {{Catalog R}} and remained available through {{Catalog 1978}}. | |||
The 874-VQL is used in frequency-response measurements with a [[1750-A|1750-A Sweep Drive]] and [[1263-A|1263-A Amplitude Regulating Power Supply]]. | |||
An [[874-VI|874-VI Voltmeter Indicator]] can be used for calibrated measurements from 0.1 to 2 V. | |||
The 874-VQL contains a 1N23B diode and a mica capacitor. It is similar to the [[874-VR|874-VR Voltmeter Rectifier]], but omits the latter's 50 Ω series resistor, and includes matching elements to compensate for the discontinuity caused by the diode capacitance. | |||
==Key Specifications== | |||
* Frequency range: 500 kHz to 2 GHz ("in limited application" up to 7 GHz) | |||
* Maximum input: 2 V | |||
* VSWR: ≤1.1 @ 1 GHz, ≤1.2 @ 2 GHz; rising rapidly above 2.5 GHz | |||
* Resonant frequency: 3.6 GHz | |||
==Links== | |||
* [[874-VQ]] − Version with non-locking connectors | |||
* [[Media:GR Exp 874 Locking 10_1961.pdf|Experimenter October 1961 describing 874 Locking Connectors]] | |||
* [[Media:GR Exp 874 Locking 07_1962.pdf|Experimenter July 1962 describing 874 Locking Connectors]] | |||
* [[Media:1N Series Microwave Diode Data Sheet.pdf|1N23B Microwave Diode Data]] | |||
==Photos== | |||
<gallery> | |||
GR 874-VQL Front.jpg | |||
GR 874-VQL Front A.jpg | |||
GR 874-VQL Open A.jpg | |||
GR 874-VQL Open B.jpg | |||
GR 874-VQL 1N21B.jpg | |||
</gallery> | |||
[[Category:Coaxial Elements]] | |||
[[Category:GR-874]] | |||
Latest revision as of 15:05, 20 June 2024
The General Radio 874-VQL is a "voltmeter detector" with two locking GR-874 connectors for the signal, and a non-locking GR-874 for the rectified output. It was introduced in Catalog R (1963) and remained available through Catalog 1978.
The 874-VQL is used in frequency-response measurements with a 1750-A Sweep Drive and 1263-A Amplitude Regulating Power Supply. An 874-VI Voltmeter Indicator can be used for calibrated measurements from 0.1 to 2 V.
The 874-VQL contains a 1N23B diode and a mica capacitor. It is similar to the 874-VR Voltmeter Rectifier, but omits the latter's 50 Ω series resistor, and includes matching elements to compensate for the discontinuity caused by the diode capacitance.
Key Specifications
- Frequency range: 500 kHz to 2 GHz ("in limited application" up to 7 GHz)
- Maximum input: 2 V
- VSWR: ≤1.1 @ 1 GHz, ≤1.2 @ 2 GHz; rising rapidly above 2.5 GHz
- Resonant frequency: 3.6 GHz
Links
- 874-VQ − Version with non-locking connectors
- Experimenter October 1961 describing 874 Locking Connectors
- Experimenter July 1962 describing 874 Locking Connectors
- 1N23B Microwave Diode Data
