The TDD13 is a mains double diode triode designed for 200 mA heater chains. This suggests universal mains supplies, and the anode voltage of 200 Volts confirms this.
The double diode triode would be found at the end of the IF chain in the line-up and would perform the functions of signal and AGC rectification as well as first audio amplification stage feeding the output stage valve.
The classic envelope is 40 mm in diameter and, excluding the B7 base pins, is 100 mm tall.
Pin Connections
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
tc |
|
a(d2) |
m |
a(d1) |
h |
h |
k |
a |
g1 |
Absolute Maximum Operating Conditions
|
Vh |
Ah |
Va |
Vg |
mAa |
ra |
gm |
|
13.0 |
0.2 |
200 |
-5 |
4.0 |
13,500 |
2.0 |
This exhibit was last updated on 21 October 2001 |
|