Tube-number record
1725A
0 archive entries
1725A is a tube type in the TubeDatabase archive (class: Gas-filled Rectifier). Recorded specifications: brand Philips, construction Other / special, socket 4-pin, and maximum plate voltage 470 V. The archive does not yet hold a photographed example of this type.
BrandPhilips
ClassGas-filled Rectifier
Base4-pin
Construction
Primary TypeOther / special
Rectifier TypeDouble-anode
EnvelopeGlass
Sections2
Filament / Heater
MaterialOxide-coated
Warm-up Time15s
Absolute Maximum Ratings
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Circuit 2 | 150 V | — | — | — | 650 mA |
Application Notes
Specifically designed for magnetic chucks (1.3 A per valve). The screen must be connected to the cathode via a resistor of 10 kOhms, 0.5 W. Mounting position is vertical with base down.
Datasheets
Datasheet: 1725A.pdf
Download PDFLoading datasheet...
Datasheets courtesy of Frank Philipse via Frank's Electron Tube Data Sheets.
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