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Type '''650-P1 Oscillator-Amplifier'''.
{{GR Product
|model=650-P1
|codes=BOGUS
|class=impedance measurement
|summary=Oscillator-Amplifier
|image=GR 650-P1 Close-Up.jpg
|caption=General Radio 650-P1 Oscillator-Amplifier
|series=650
|introduced=1948
|discontinued=1956
|designers=
|manuals=
* [[Media:GR 650-A an 650-P1 Impedance Bridge Manual 346-I 01_1962.pdf|General Radio 650-P1 Oscillator-Amplifier346-I 1962]]
{{Catalog History}}
}}
The {{Title|General Radio 650-P1 Oscillator-Amplifier}} was introduced in {{Catalog L}} and remained available through {{Catalog O}}.
 
The Type 650-P1 is an accessory oscillator and amplifier for the Type [[650-A]] Impedance Bridge. Its designed to fit into the empty battery compartment of the bridge.  It provides a DC potential and 1 kHz generator for bridge measurements. A built-in amplifier is available for AC detector use.  Amplifier gain is variable and a choice of tuned 1 kHz or flat frequency response. The 1 kHz generator output has a variable control.
* '''Caution:''' The DC output terminals have at least 185 V available and are uninsulated!
 
 
==Specifications==
==Specifications==
* '''Oscillator'''
* '''Frequency:''' 1 kHz ±1%
* '''Harmonics:''' less than 4% at full output
* '''Open-Circuit Voltage:''' 10 to 15 V
* '''Internal Impedance:''' 2000 Ω
* '''Amplifier:'''
* '''Voltage Gain:''' 45 dB
* '''Selectivity:''' approximately 15 dB attenuation to second harmonic when tuned to 1 kHz
* '''DC Output:'''
* '''Open circuit voltage:''' 185 V,  approximately
* '''Internal Resistance:''' 23 kΩ


==Links==
==Links==
* [[Media:GR Exp 650-P1 04_1946.pdf|Experimenter October 1946 describing Type 650-P1]]




==Photos==
==Photos==
<gallery>
<gallery>
GR 650-P1 Front.jpg
GR 650-P1 Right Side.jpg
GR 650-P1 Rear Panel.jpg
GR 650-P1 Top.jpg
GR 650-P1 Bottom.jpg
GR 650-P1 Inside Top.jpg
GR 650-P1 Inside Bottom.jpg
</gallery>
</gallery>


[[Category:Impedance measurement]]
[[Category:Impedance measurement]]
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