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AMPEREX

12AX7 / ECC83 AMPEREX Bugle Boy Matched Pair Short Plates Large Halo Getter MADE IN HOLLAND '60s

12AX7 / ECC83 AMPEREX Bugle Boy Matched Pair Short Plates Large Halo Getter MADE IN HOLLAND '60s

1.418,00 RON
1.418,00 RON
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12AX7 / ECC83 AMPEREX Bugle Boy Short Plates Large Halo Getter Tested Tubes MADE IN HOLLAND '60s

AMPLITREX Tested – STRONG – Matched Pair – Same Data Codes – Low Noise & Microphonics 

Test Results:

Tube tested on AMPLITREX AT-1000 Tube Tester:

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

Tube 1:

  • Section 1: Gm = 1400 ; Ia = 0.8 mA
  • Section 2: Gm = 1500 ; Ia = 1.0 mA

Tube 2:

  • Section 1: Gm = 1300 ; Ia = 0.7 mA
  • Section 2: Gm = 1500 ; Ia = 1.1 mA
Additional Tests Performed:
  • Burn-in / Stability Test: 48h – OK
  • Microphonics: Very Low. Tested and suitable for use in hi-fi and guitar amplifiers. Suitable for use in V1.
  • Balance: The sections are not perfectly aligned. The tube is recommended for hi-fi use in non-critical stages (input or driver) and in guitar amplifiers. Not recommended as a phase inverter or in applications requiring strict balance between the sections.
  • Emission Quality: Strong – Strong and even emission, suitable for any application.
  • Short Circuits and GAS: None.

Description:

Selected vintage pair of 12AX7 / ECC83 Amperex Bugle Boy, produced at the historic Philips factory in Heerlen, Netherlands, and carefully matched as a Matched Pair. Both specimens feature the sought-after Short Plates with Large Halo Getter construction, characteristic of Amperex's Dutch production during this period. The engraved manufacturing codes I62 / ⊿0B, common to the pair, suggest production dating back to February 1960. A particularly interesting combination for audiophiles and collectors looking for authentic Bugle Boys from the same production era.

The measurements performed with the Amplitrex AT-1000 highlight a good overall electrical match. The first tube has transconductances of 1400 and 1500 µmhos, while the second measures 1300 and 1500 µmhos, with averages of 1450 and 1400 µmhos, respectively, compared to the nominal reference of 1600. The anode currents range from 0.7 to 1.1 mA, with an identical average of 0.9 mA for both tubes, compared to the reference of 1.2 mA. The matching is therefore particularly consistent in the average values, although there are differences between the individual sections, clearly documented by the measurements.

Both tubes have passed 48 hours of burn-in and stability testing, maintaining a strong and even emission, without fluctuations, short circuits, or the presence of gas. The tests also confirmed very low noise and microphonic levels, making the pair interesting even for the most sensitive input stages, including the V1 position in guitar amplifiers.

The Amperex Bugle Boy Short Plates find application in hi-fi preamplifiers, compatible phono stages, and guitar amplifiers. Given the differences between the sections, this pair is not recommended for phase inverter circuits requiring strict symmetry. Philips Heerlen production is traditionally appreciated by audiophiles for a musical presentation generally described as refined, natural, and harmonically rich, with an expressive midrange and pleasant dynamic articulation.

The value of this pair lies in its authentic Amperex Bugle Boy Short Plates construction, matching production codes, and low-noise selection. The partially preserved screen printing and good overall condition attest to the vintage nature of the specimens, while instrumental testing documents their full current functionality. Two authentic Amperex Bugle Boy Made in Holland tubes, carefully tested and matched, for those seeking vintage Dutch tubes with identifiable origin, documented electrical characteristics, and verified stability.

Condition:

  • Condition: Vintage Tubes - Tested and perfectly functional. Supplied in our custom box for optimal protection.
  • Functionality: Perfectly operational.
  • Aesthetic condition: Good – Lettering partially eroded but still legible. Tube body in good condition. See photos for details.
  • Manufacturing Code: Amperex Bugle Boy ECC83 / 12AX7, produced at the Philips factory in Heerlen, Netherlands, probably in February 1960, according to the interpretation of the engraved production codes I62 / ⊿0B.

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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

    Please understand that the writing on the glass of vintage valves has become very delicate over the years and comes off easily. You must handle them with extreme care to avoid this. Wear and damage to the writing on the valves reduces their market value and causes damage. Please exercise extreme caution.

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