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GE

12BH7 GE Matched Pair Oval Gray Plates Horseshoe Getter USA 1960s AMPLITREX Tested

12BH7 GE Matched Pair Oval Gray Plates Horseshoe Getter USA 1960s AMPLITREX Tested

908,00 SEK
908,00 SEK
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12BH7 GE Oval Gray Plates Horse Shoe Getter – Matched Pair – Made in USA – 1960s

AMPLITREX Tested – VERY STRONG – Low Noise & Microphonics – Vintage American General Electric Production

Test Results

Tubes tested on AMPLITREX AT-1000 Tube Tester

Test Conditions: Va = 250V, Vg = -10.5V
Average 100%: Gm = 3.10 ; Ia = 11.5 mA
Test Result: VERY STRONG

Tube #1:
  • Section 1: Gm = 2.70 ; Ia = 9.6 mA
  • Section 2: Gm = 2.80 ; Ia = 10.5 mA
Tube #2:
  • Section 1: Gm = 2.60 ; Ia = 9.6 mA
  • Section 2: Gm = 2.71 ; Ia = 11.8 mA

Additional Tests Performed

  • Burn-in / Stability Test: 48h – OK
  • Microphonics: Low. Tested and suitable for use in hi-fi equipment and guitar amplifiers, even in the most sensitive audio stages.
  • Balance: Very good. The sections are consistent and well-aligned, making the tube suitable for use as a phase inverter in hi-fi and instrumental applications.
  • Emission Quality: Excellent – Very strong and stable emission, without fluctuations.
  • Shorts and GAS: Absent.

Description:

Interesting Matched Pair of 12BH7 General Electric, vintage American production attributable to the 1960s, characterized by the classic Oval Gray Plates with Horse Shoe Getter construction, representative of GE's solid production during this period.

The two specimens show a slight variation in the getter support, clearly visible in the photographs, compatible with different construction configurations of GE production. The pair was selected based on the correspondence of electrical values, a determining criterion for matching.

The 12BH7 is a double triode particularly appreciated in driver and line stages due to its good driving capability, robustness, and operational stability. These General Electric Made in USA specimens represent an interesting choice for vintage hi-fi equipment and instrument amplifiers.

The tubes, Vintage Used but still electrically very strong, underwent 48 hours of burn-in / stability test and were subsequently tested in our laboratory using the Amplitrex AT-1000 Tube Tester, obtaining a VERY STRONG classification. The pair also resulted in Low Noise & Microphonics, with stable behavior and no anomalies detected.

The balance between sections is VERY GOOD, with consistent and well-aligned values. This characteristic, along with the Low Noise & Microphonics selection, makes the tubes particularly interesting for use as a phase inverter, as well as in driver stages, line stages, and compatible hi-fi and instrumental applications.

From a sonic perspective, vintage 12BH7A GE tubes are appreciated for a solid, dynamic, and natural presentation, with good bass presence, full and well-defined mids, and clean and controlled highs. The driving capability typical of the 12BH7 contributes to energetic and authoritative reproduction in equipment designed for this tube.

The tubes are Vintage Used, carefully tested, and fully functional. The aesthetic condition is adequate for their age and previous use, with partially faded or illegible silkscreen prints and clear signs of time.

An interesting electrically matched pair of authentic GE 12BH7 Oval Gray Plates Horse Shoe Getter Made in USA, truly tested and selected by Vacuum Tubes Treasures, ideal for those seeking two vintage American 12BH7A tubes that are still strong, quiet, and reliable.

Condition

  • Condition: Vintage Tubes - Tested and fully functional. Supplied in our custom box for optimal protection.
  • Functionality: Fully operational.
  • Aesthetic condition: Sufficient – Markings completely gone. See photos for details.
  • Manufacturing Code: not decipherable. Production roughly attributable to the 1960s based on construction characteristics.

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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.

Vacuum Tubes Treasures
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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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