🔥 Mullard VR136 / EF54 🔥
Military Grade (CV136)
Metal Tube
Made in Great Britain
This is a rare **NOS (New Old Stock)** matched pair of the **Mullard VR136**, also known as the **EF54**. This tube is distinguished by its durable metal envelope, which offers exceptional shielding and ruggedness, making it highly valued in vintage communication and professional audio gear. They are meticulously matched for Plate Current (Ia).
- Type: VR136 / EF54
- Brand: Mullard
- Condition: New in Original Gvt Box
- Construction: Metal Envelope
- Base: B8G (Octal-like)
- Testing: Amplitrex AT1000
Military Grade: VR136 is the military designation for this tube, ensuring quality, long-life, and excellent build standards.
Feature: The metal casing provides superior electromagnetic shielding, ideal for sensitive RF or early audio stages.
Equivalents: CV136, 10E/386.
Rarity: Authentic NOS Mullard metal-envelope tubes are difficult to source in matched pairs.
**Matched Pair Test Data (Amplitrex AT1000)**
| Tube ID | Serial No. | Plate Current (Ia) | Transconductance (Gm Proxy) | ||
|---|---|---|---|---|---|
| Result (ma) | % of NOS Spec | Result (mV/V) | % of NOS Spec | ||
| Tube 1 | 2753002 | 9.3 | 89.4% | 7.5 | 90.3% |
| Tube 2 | 2753001 | 11.0 | 105.7% | 8.0 | 96.4% |
✉️ For custom matching or technical information, feel free to **Email us** at
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