One of the rarer ECC83 variants you will encounter - a NOS matched pair of MIL-marked Mazda Belvu double triodes, the French/Belgian military-grade tube built by MBLE for low microphony and rugged consistency. Black shiny plates, inclined square getter. Tested matched and closely balanced across both sections. Price per pair.
Uh = 12.6V | Ua = 250V | Ug1 = -2.0V
| Section | Ia (mA) | S (mA/V) | Nominal (100%) |
|---|---|---|---|
| Tube 1 - T1 | 1.3 | 2.1 | Ia = 1.2 / S = 1.6 |
| Tube 1 - T2 | 1.3 | 2.0 | |
| Tube 2 - T1 | 1.2 | 1.9 | |
| Tube 2 - T2 | 1.3 | 2.0 |
ECC83 = 12AX7 = B339 = 95-127-01 = 6L13 = CM1 = ECC83S
Normally replaceable, slightly different: 0AX7 ~ 12AX7A ~ CV492 ~ E2164
Other class quality (otherwise equal): 7025 ~ CV4004 ~ E83CC ~ M8137
Predecessor: 12AX7; Successors: ECC808 ~ 5751WA
The ECC83 (12AX7) is the definitive high-gain audio double triode, introduced in 1954 and used across thousands of amplifiers and preamps. Mazda Belvu, produced by MBLE, built its miniature dual-triodes to demanding French and Belgian military and industrial specifications, competing directly with Philips/Mullard and Telefunken. This pair carries the MIL marking that denotes military-grade selection, with black shiny plates and an inclined square getter - a construction favoured for low microphony and rugged consistency. Mazda Belvu tubes are highly regarded among European tube connoisseurs for their warm, dynamic tone, and a genuine NOS matched pair is increasingly hard to find.
A matched, MIL-grade Mazda Belvu pair in NOS condition rarely surfaces - black plates, inclined square getter, closely balanced. Claim it now.
SKU: 70