|
HL21/DDSensibly equivalent¶ to:
|
|
|
The HL21/DD is a battery double diode triode from Mazda. Pin 2 is the AGC diode anode and pin 5 is the detector diode anode.
The plain zinc paint on the reverse.The classic envelope is 44 mm in diameter and, excluding the B5 base pins, is 106 mm tall.References: Data-sheet & Data. Type HL21/DD was first introduced in 1934. See also 1934 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | tc |  a | a(d1) | f(-) | f(+) | a(d2) | g1 |
|
|
Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vg | mAa | ra | gm | μ | 
| 2.0 | 0.15 | 150 | - | - | 21,000 | 1.5 | 32 |
|
Updated August 04, 2023.
|
|
