Sylvania 5R4GYB — 4 Pcs
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- ✅ Brand: Sylvania
- ✅ Model: 5R4GYB
- ✅ Plate Type: Black Plate
- ✅ Getter Type: Side Ring Getter
- ✅ Origin:Made in USA
- ✅ Condition: New in Original Box
- ✅ Tested: On Amplitrex AT1000
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Test Results
| Serial No. | Section | FWD | REV |
| 3602013 | A | 33V | 409V |
| B | 34V | 409V | |
| 3602031 | A | 33V | 409V |
| B | 34V | 410V | |
| 3602034 | A | 33V | 411V |
| B | 34V | 410V | |
| 3602037 | A | 33V | 410V |
| B | 34V | 409V |
⚠️ Note: Custom duties and taxes are the responsibility of the buyer in their country.
About This Tube
The Sylvania 5R4GYB is a rugged full-wave rectifier well regarded for its long life, high reliability, and stable rectification performance. Popular in tube amplifiers, military equipment, and vintage electronics, this model is known for its consistent voltage handling even under heavy load.
Featuring black plates and a side ring getter, the 5R4GYB is designed to deliver dependable operation with minimal noise. Its USA-made construction makes it a preferred choice for audiophiles, restorers, and users looking for strong, durable rectifier tubes.
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