▼ Menu

D15

Sensibly equivalent to:
CV1539
    
Extras ▼

 

The D15 is a current stabilising barretter. The current remains sensibly constant at 150 mA for voltages within the range 90 to 140. The barretter functions only within a series heater chain. The cold resistance is 240Ω.
At this magnification the The filament looks to be is a single strand looped over the supports. Traditionally the wire is iron and the low pressure gas inside the envelope is hydrogen.
A closer look reveals the filament to be a coil.
Here the coiled filament is clearly seen.
The wide glass tube envelope is 39 mm in diameter, and excluding the IO base pins is 77 mm tall.
References: Data-sheet, 1040 & 1043.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
nc
h
nc
nc
nc
nc
nc
h

 

Absolute Maximum Operating Conditions
Stabiliser
Va
mAa
90-140
150
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 07, 2022.
Return to Main Index