This exhibit is the Mullard ECC82. Designed as audio and general purpose triodes, two independent valves exist in the envelope.
An amplification factor of 17 is quoted, which is much lower than that for the pin compatible ECC83 at 100.
In television receivers the ECC82 was used as frame and line timebase multi-vibrators, AGC circuits and driver stages. It was as multi-vibrators that faults would most often develop.
Another ECC82 in the collection shows a different style of lettering in this long lived device.
The thin glass tube envelope is 20 mm in diameter and the length excluding the B9A base pins, is 48 mm.
References: Datasheet & 1040. Type ECC82 was first introduced¶ in 1951.
Pin Connections
B9A |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |

|
a(2) |
g1(2) |
k(2) |
h |
h |
a(1) |
g1(1) |
k(1) |
hct |
Absolute Maximum Operating Conditions¶
Triode |
Vh |
Ah |
Va |
Vg |
mAa |
gm |

|
6.3 |
0.3 |
250 |
-8.5 |
10.5 |
2.2 |
Thanks to Frank Philipse for supplying the above PDF datasheet
More

Click on the picture above if you are interested in viewing more exhibits. These exhibits feature more photographs and datasheets as well as other information that might be of interest to those with Valve Collections. If you are unfamiliar with or 'new' to valves, as your interests up until now have been mainly in Foreign Coin collections, Fisher Investments or some other hobby, why not brush up on some Valve Basics before moving on to the next exhibit?
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