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RAYTHEON

12AX7 / ECC83 NOS Baldwin by RAYTHEON Long Black plates Halo Getter Tested Balanced Tube USA

12AX7 / ECC83 NOS Baldwin by RAYTHEON Long Black plates Halo Getter Tested Balanced Tube USA

1.981,00 CZK
1.981,00 CZK
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12AX7 / ECC83 NOS Baldwin by RAYTHEON Long Black plates Halo Getter Tested Tube Made in USA

AMPLITREX Tested – VERY STRONG – Balanced – Vintage American Raytheon Production

Test Results:

Tube tested on AMPLITREX AT-1000 Tube Tester:

  • Test Conditions: Va = 250V ; Vg = -2V
  • Average 100%: Gm = 1600 ; Ia = 1.2 mA
  • Test Result: VERY STRONG

Tube :

  • Section 1: Gm = 1700 ; Ia = 1.1 mA
  • Section 2: Gm = 1700 ; Ia = 1.1 mA
Additional tests performed:
  • Burn-in / Stability Test: 48h – OK
  • Microphonics: Standard. Tested and compliant for use in hi-fi equipment and guitar amplifiers. Recommended for V2, V3, and V4 positions, as a driver, or in less critical stages. For V1 and high-gain positions particularly sensitive to microphonics, we recommend a low-microphonic selected tube.
  • Balance: Excellent - The sections are consistent and well-matched, making the tube also suitable for use as a phase inverter in hi-fi and musical instrument applications.
  • Emission Quality: Excellent – Very strong and stable emission, without fluctuations.
  • Shorts and GAS: None.

Description

This 12AX7 / ECC83 NOS Baldwin-branded tube is an original Raytheon production, manufactured in the United States during the 29th week of 1961, as confirmed by the RMA/EIA code P280 61-29C. Originally intended for Baldwin equipment, it features the sought-after Raytheon construction with long black plates and halo getter, typical characteristics of high-quality American production from that era.

Professionally tested with an Amplitrex AT-1000, it provided results significantly higher than the average reference values: both sections measure Gm 1700 and Ia 1.1 mA, highlighting a very strong, stable, and perfectly uniform emission. The 48-hour burn-in was passed successfully, with no fluctuations, shorts, or gas present.

The balance is excellent, with identical values between the two triodes. This feature makes the tube particularly suitable as a phase inverter, as well as in driver stages and hi-fi or musical instrument applications that require symmetrical and predictable performance.

This unit has standard microphonics: it is fully suitable for hi-fi and guitar amplifiers in positions V2, V3, and V4, as a driver, or in less critical stages. For V1 and high-gain inputs particularly sensitive to microphonics, a specifically selected low-microphonic tube is preferred.

From a sound perspective, this Raytheon production is appreciated for its dynamic, natural, and well-defined output, accompanied by good tonal consistency and a balanced response. A noteworthy NOS specimen capable of combining vintage American construction, very strong emission, and perfect electrical matching between sections.

Condition:

  • Condition: NOS - New Old Stock - Tested and functional - Supplied in our custom box for optimal protection.
  • Functionality: Perfectly operational.
  • Cosmetic Condition: Good – Markings are clearly legible with slight signs of aging. See photos for details.
  • Manufacturing Code: P28061-29C → 280 → Raytheon Manufacturing Company, Waltham 54, Mass. ; 61-29 → RMA/EIA Open Date Code → manufactured in the 29th week of 1961

Discover why our tubes are different →

Terms of Sale & Safety

Sales Terms & Product Safety

Each vacuum tube is carefully selected, tested, and verified in our laboratory before shipment. Where stated in the listing, test results, matching data, and declared characteristics refer to measurements performed using the specified test equipment and operating conditions.

Sound descriptions are provided for guidance only and reflect the characteristics generally associated with that particular tube type. Personal sound preferences, tube rolling, or perceived differences between audio systems do not constitute a product defect.

Before installation, please verify the tube’s electrical and mechanical compatibility with your equipment and follow the manufacturer’s instructions.

New production and NOS tubes are shipped with a tamper-evident security seal and internal technical documentation to ensure traceability of the product’s condition at the time of shipment.

Product Safety (GPSR)

Vacuum tubes are electronic components intended exclusively for use in compatible equipment and must be installed in accordance with the equipment manufacturer’s instructions.

Due to their historical or vintage nature, certain technical specifications may be based on original datasheets or equivalent technical documentation when documentation from the specific manufacturer is unavailable.

Use only with suitable equipment. Keep out of reach of children.

Shipping & Returns

Shipping & Returns

We ship worldwide using carefully selected express carriers and protective packaging specifically designed for vacuum tubes.

If you change your mind, you may exercise your right of withdrawal within 14 days of delivery, where applicable under the relevant consumer protection laws. The product must be returned complete with its original packaging and accessories, in the same commercial condition in which it was received. Return shipping costs are the responsibility of the customer.

Every returned item undergoes a technical inspection. Installation, use, tube rolling, or any other handling may reduce the product’s commercial value and may affect the refund amount, in accordance with applicable law.

If you believe the product has a lack of conformity, our laboratory will carry out the necessary inspections and apply the remedies provided by the applicable consumer protection legislation.

For further details, Customers are invited to consult the “Terms and Conditions” and “Refund Policy” sections of our website, or to contact us before placing an order.

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  • ATTENTION PLEASE

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