Triotron / CV181

This listing is for 2 NOS TRIOTRON (MULLARD) CV181 - ECC32 tubes. The price is for both tubes, which were in SEALED boxes before I opened them for photographs. These tubes were produced in Blackburn, England before 1955, as indicated by the etched codes 1185, and were made for military use. They feature black anodes, a square (D-getter), gray-coated glass inside, and brown bases. They are quite rare.

The test results are as follows:

Tube 1 => 1185 L2

Ia1 = 6.0 mA | S1 = 2.1 mA/V | Ri1 = 14.3 kOhm | μ1 = 30.0

Ia2 = 5.7 mA | S2 = 2.1 mA/V | Ri2 = 14.9 kOhm | μ2 = 31.3

Tube 2 => 1185 K2

Ia1 = 6.1 mA | S1 = 2.1 mA/V | Ri1 = 14.9 kOhm | μ1 = 31.3

Ia2 = 5.8 mA | S2 = 2.0 mA/V | Ri2 = 15.6 kOhm | μ2 = 31.2

Testing was conducted under the following conditions: Uh=6.3V | Ua=250V | Ug1=-4.6V. These are VERY DESIRED, RARE AND HIGH-QUALITY TUBES!

Shipping via registered airmail with tracking number. Import fees for U.S. buyers are included in the shipping cost under the new tariff regulations. Other methods available upon request.

Internal Reference (SKU): listed_tested_-_lot1_5aaba