The N37 is a television type audio output pentode.The load impedance is 6000 Ohms and the cathode resistor is 330 Ohms. At 10% total harmonic distortion the valve can produce 2.3 watts of audio.![](../pics/aam0072a.jpg)
The red Marconi label covers most of the envelope circumference.The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 58 mm tall.References: Data-sheet & 1040. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | ![](../static/key.gif) g1 | k | h | h | a | ic | g2 |
|
|
Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | ![](../static/pdflogo.gif)
| 13.0 | 0.3 | 165 | 165 | -11.4 | 29.0 | 5.4 | 23200 | 9.5 |
|
Updated May 03, 2013.
|
|