The Fisher 7591 Trio (3 Pcs) — NOS
NOS
Top Ring Getter
Black Plate
Black Base
Top Ring Getter
Black Plate
Black Base
Up for sale is a rare trio of genuine The Fisher 7591 power vacuum tubes. These are New Old Stock (NOS) units housed in clean white boxes. These American-made classics feature Black Plate construction, a Top Ring Getter, and a sleek Black Base with clear glass. All three have been precision-screened on our Amplitrex AT1000.
- Type: 7591
- Brand: THE FISHER
- Condition: New in White Box
- Origin: Made in USA
- Testing: Amplitrex AT1000
- Quantity: 3 Pieces
Sonic Profile: The heart of many legendary Fisher amplifiers. Known for a punchy, high-output sound with a sweet top end and controlled bass characteristic of original USA production.
⚠️ Custom duties & taxes are the buyer’s responsibility for international shipping.
| SR. NO. | Ip mAdc | uMhos (Gm) | RP ohms | Mu |
|---|---|---|---|---|
| 546002 | 39.0 | 8320 | 28.5K | 237.1 |
| 546006 | 41.6 | 8500 | 50.0K | 425.0 |
| 546007 | 37.4 | 8000 | 50.0K | 400.0 |
About Audio Tubes Shop
We specialize in thoroughly tested and screened quality vacuum tubes. We have been in the valve and tube business since the 1970s. Our inventory is screened using premium equipment including the Amplitrex AT1000.
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