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TELEFUNKEN

5965 / E180CC NOS TELEFUNKEN Matched Pair Diamond Bottom Made in GERMANY

5965 / E180CC NOS TELEFUNKEN Matched Pair Diamond Bottom Made in GERMANY

3.863,00 NOK
3.863,00 NOK
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5965 / E180CC NOS TELEFUNKEN Diamond <> Bottom Made in GERMANY

AMPLITREX Tested – Matched Pair – Low Noise & Microphonics – Vintage TELEFUNKEN Production

Test Results

Tested on AMPLITREX AT-1000 Tube Tester

Voltage Test: Va = 150V, Vg = -1.2V
Average 100%: Gm = 7.00 ; Ia = 10.0 mA
TEST RESULT: VERY STRONG

Tube 1:

  • Section 1: Gm = 9.70 ; Ia = 11.6 mA
  • Section 2: Gm = 10.90 ; Ia = 13.9 mA

Tube 2:

  • Section 1: Gm = 10.70 ; Ia = 14.4 mA
  • Section 2: Gm = 10.30 ; Ia = 13.6 mA

Additional Tests performed:
  • Burn-in / Stability Test: 48h – OK
  • Microphonics: Low. Tested and compliant for use in hi-fi equipment and guitar amplifiers, even in the most sensitive audio stages.
  • Balance: Good. The sections show consistent balance, fully compatible for use in hi-fi and musical amplifiers, in all applications where absolute symmetry between sections is not required.
  • Emission Quality: Excellent – Very strong and stable emission, without fluctuations.
  • Short Circuits and GAS: Absent.

Description:

Prestigious NOS / NIB pair of 5965 – E180CC Telefunken, authentic German production from the Ulm factory, immediately recognizable by the characteristic diamond embossed in the glass between the pins. The two tubes come from different Telefunken batches, dated September 6, 1965 and August 1, 1967, but share the same construction and have been selected together for their excellent electrical performance.

Tests performed with Amplitrex AT-1000 show values significantly higher than the nominal reference of 7.00 mA/V. The four sections actually measure between 9.70 and 10.90 mA/V, confirming an exceptionally vigorous emission. The transconductance averages of the two tubes are particularly close: 10.30 and 10.50 mA/V, with a difference of less than 2%, a characteristic that makes the pair optimally matched under the main parameter.

Anode currents, between 11.6 and 14.4 mA, also confirm energetic and steady operation. Overall balance is good, even if it does not represent an absolute symmetry selection between all sections. The 48-hour burn-in verified the stability of the parameters, without fluctuations, short circuits, or the presence of gas.

The low microphonics make these Telefunkens suitable for preamplifiers, drivers, buffers, professional equipment, and measuring instruments designed for 5965 or E180CC, even in the most sensitive audio stages. The 5965/E180CC has specific operating characteristics and must be used exclusively in circuits compatible with or expressly designed for this type of tube.

In terms of sound, the Telefunken Ulm production is appreciated for a transparent, precise, and authoritative reproduction, with a clean midrange, firm and articulated low frequencies, and extended highs without harshness. The remarkable transconductance of this pair contributes to a ready and dynamic response, while the coherence between the two specimens promotes image stability and uniformity between channels.

A high-level proposal for those looking for an authentic Telefunken NOS/NIB pair, complete with their boxes, original bottom diamond, documented Ulm origin, low microphonics, and electrical values significantly above average: two carefully tested, matched, and ready-to-use German 5965/E180CC tubes.

Conditions:

  • Condition: NOS - NIB - New Old Stock, New In Box - Tested and functional - Supplied in Telefunken box.
  • Functionality: Perfectly operational.
  • Cosmetic condition: Very Good – Markings are clearly legible with slight signs of age. See photos for details.

Manufacturing Code:

  • U6005904 – TELEFUNKEN production Diamond embossed in the glass between the pins, Ulm factory - September 6, 1965
  • U2207804 – TELEFUNKEN production Diamond embossed in the glass between the pins, Ulm factory - August 22, 1967

Find out 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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