View source for 505

{{GR Product
|model=505
|codes=
|class=505
|summary=Capacitor
|image=GR 505 Stacked Small and Large Case.jpg
|caption=General Radio 505 Capacitor
|series=505
|introduced=1934
|discontinued=1965
|designers=
|manuals=
* '''Manual Needed.'''
{{Catalog History}}
}}
The {{Title|General Radio 505 Capacitor}} was introduced in {{Catalog G2}} and remained available through {{Catalog S}}. 

The Type 505 is a secondary capacitance standard using a silvered-mica dielectric.  The capacitor is installed in a low-loss phenolic case along with Silica gel desiccant then sealed with wax. The Type 505 has almost as equally high stability as the [[1409]] Standard Capacitor at one quarter the cost. The Type 505 is found in many General Radio instruments as a capacitance standard. It is supplied in two case sizes, the small and large. 


The {{Title|505 series of standard capacitors}} comprises

{{505 series}} 

==Specifications==

* '''Accuracy:''' at 1 kHz, ±0.5% or ±3 pf, whichever is the larger
* '''Dielectric:''' Silvered-Mica
* '''Temperature Coefficient:''' Approximately +35 ppm per degree Centigrade between 10 and 50 C. Calibration is made at 23 C, at a frequency of 1 kHz

==Links==
* [[Media:GR Exp 505 01_1933.pdf|Experimenter January 1933 describing Type 505]]
* [[Media:GR Exp 505 1457-K 10_1957.pdf|Experimenter October 1957 describing Type 505]]

{| class="wikitable" style="margin:auto"
|+ Type 505 Series of Capacitors
|-
! Type!! Capacitance !! Dissipation<br>Factor !! Maximum Peak<br>Voltage !! Frequency Limit<br>for Max Volts !! Leakage<br>Resistance !!Code 
|-
|[[505-A]] || 100 pF  || 0.0006  || 700  || 10 MHz   || >100,000 MΩ || 0505-9701  
|-
|[[505-B]] || 200 pF  || 0.0004  || 700  || 6 MHz    || >100,000 MΩ || 0505-9701
|-
|[[505-E]] || 500 pF  || 0.00035 || 500  || 4 MHz    || >100,000 MΩ || 0505-9705
|-
|[[505-F]] || 0.001 μF|| 0.0003  || 500  || 2.3 MHz  || >100,000 MΩ || 0505-9706 
|-
|[[505-G]] || 0.002 μF|| 0.0003  || 500  || 1.3 MHz  ||>100,000 MΩ  || 0505-9707
|-
|[[505-K]] || 0.005 μF|| 0.0003  || 500  || 630 kHz  || >100,000 MΩ || 0505-9711
|-
|[[505-L]] || 0.01 μF || 0.0003  || 500  || 360 kHz  || >100,000 MΩ || 0505-9712 
|-
|[[505-M]] || 0.02 μF || 0.0003  || 500  || 210 kHz  || >100,000 MΩ || 0505-9713
|-
|#[[505-Q]] || 0.05 μF || 0.0003  || 350  || 32 kHz  || >100,000 MΩ ||CONDENJACK
|-
|#[[505-R]] || 0.05 μF || 0.0003  || 500  || 100 kHz  || >100,000 MΩ || 0505-9718
|-
|#[[505-T]] || 0.1 μF  || 0.0003  || 500  || 50 kHz   || >50,000 MΩ  || 0505-9720
|-
|#[[505-U]] || 0.2 μF  || 0.0003  || 500  || 20 kHz   || >25,000 MΩ  || 0505-9721
|-
|#[[505-X]] || 0.5 μF  || 0.0003  || 500  || 10 kHz   || >10,000 MΩ  || 0505-9724
|-
|}

* '''#Mounted in large case.'''

==Photos==

<gallery>
GR 505 Stacked Small and Large Case.jpg
GR 505 Stacked Small and Large Case A.jpg
GR 505 Technical Drawing.jpg
</gallery>

===Small Case===

<gallery>
GR 505 Bottom Small Case.jpg
GR Top Small Case.jpg
GR 505 Right Small Case.jpg
GR 505 Rear Small Case.jpg
</gallery>

===Large Case===

<gallery>
GR 505 Bottom Large Case.jpg
GR 505 Top Large Case.jpg
GR 505 Right Large Case.jpg
GR 505 Rear Large Case.jpg
</gallery>

[[Category:Capacitance Standards]]

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