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Philips ECC83 12AX7 Long Plates D-Foil Getter mC2 - Heerlen

$1,786.10

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Tube Care & Handling

Vintage tubes should be handled with care. Always power equipment off and allow tubes to cool before installing or removing them. When possible, handle tubes by the base rather than pulling on the glass, and avoid bending or unnecessarily cleaning the pins.

Store unused tubes in a dry, protected location. Cosmetic variations, label wear, and other age-related characteristics are normal with authentic vintage stock and are documented in the product listing where relevant.

Description

Soundlumia's Opinion

The "textbook Heerlen sound" has been referenced in several Soundlumia ECC83/12AX7 listings, and many tube enthusiasts asked what all that means. So here is the answer: the late 1950s and very early 1960s tone, the beginning of over a decade's excellence in sound, the classic tonal template for all the great (and greater) Amperex/Philips/Valvo/Miniwatt tubes to be made in the years to come, the timeless Philips radio tone that many of us grew up listening to.

The most distinctive sound feature of the Heerlen ECC83's is the transparent, natural and expansive midrange presentation, with a slight touch of warmth that illuminates your music. Every piece of music you play through these tubes sounds like from a vinyl record, whether your sound source is phono or not. The sound stage is spacious, deep and structured. Bass is incredibly deep but well controlled and feels as accurate as on the high end German ECC83's (Siemens, Telefunken, Valvo etc.) We would recommend these as an excellent choice if you are seeking the high end ECC83 tubes that can deliver the legendary Philips house sound flawlessly. Thanks to the super rare foil d-getter on this pair, you get with fast response (as in the solid-state fast), overwhelming detail in sound and the realistic bass - this is truly the Holy Grail sound of Philips ECC83 that one should not miss!

Matched Quad

Matched Quad (1957 Matched Quad)

Philips ECC83 Long Plates D-Foil Getter Matched Quad - Heerlen 1957 mC2 - NOS

$1786.10

Matched Pairs

Matched Pair (Matched '57 - NOS+)

Philips ECC83 Long Plates D-Foil Getter Matched Pair - Heerlen '57 mC2 - NOS+

$874.96

***SOLD***

Matched Pair (1957 NOS - Same Code)

Philips ECC83 Long Plates D-Foil Getter Matched Pair - Heerlen '57 mC2 - NOS

$800.80

Matched Pair (1957 NOS+ - Same Code)

Philips ECC83 Long Plates 45° D-Foil Getter Matched Pair - Heerlen 1957 mC2 – NOS+ - Same Code

$845.00

Matched Pair (1956 NOS - Same Code)

Philips ECC83 12AX7 Foil D 45° Getter 17mm Long Plates mC2 - Matched Pair - Heerlen, NL '56 - NOS

$845.75

Professional Tube Testing

This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:

Tube 1:

Measured transconductance(GM): 1.55/1.63 mA/V - 97%/102% (100% = 1.6 mA/V)

Measured plate current(IA): 1.112/1.217 mA - 93%/101% (100% = 1.2 mA)

Tube 2:

Measured transconductance(GM): 1.55/1.63 mA/V - 97%/102% (100% = 1.6 mA/V)

Measured plate current(IA): 1.12/1.217 mA - 93%/101% (100% = 1.2 mA)

NO shorts, leakage or gas. NO noise or microphonics.

Curve trace is also included in the original RoeTest report.

Appearance & Cosmetic condition

This pair stands out aesthetically among the vintage tubes with pristine cosmetic condition. Nearly 100% of the silkscreen is well preserved and the IDENTICAL acid-etched Heerlen date codes are perfectly visible on both tubes:

mC2 ⊿6L (mC2 = ECC83 Long Plates production gen #2, ⊿ = Heerlen, 6 = 1956, L = December)

Matched Pair (1957 - NOS+)

Philips ECC83 Long Plates D-Foil Getter Matched Pair - Heerlen '57 mC2 - NOS+

$867.80

Matched Pair (1956 NOS+ - Same Code)

Philips ECC83 12AX7 Foil D 45° Getter 17mm Long Plates mC2 - Matched Pair - Heerlen, NL '56 - NOS+

$922.25

Professional Tube Testing

This set was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:

Tube 1:

Measured transconductance(GM): 1.81/1.64 mA/V - 113%/103% (100% = 1.6 mA/V)

Measured plate current(IA): 1.427/1.255 mA - 119%/105% (100% = 1.2 mA)

Tube 2:

Measured transconductance(GM): 1.84/1.65 mA/V - 115%/103% (100% = 1.6 mA/V)

Measured plate current(IA): 1.555/1.51 mA - 130%/126% (100% = 1.2 mA)

NO shorts, leakage or gas. NO noise or microphonics.

Curve trace is also included in the original RoeTest report.

Appearance & Cosmetic condition

mC2 ⊿6L (mC2 = ECC83 Long Plates production gen #2, ⊿ = Heerlen, 6 = 1956, L = December)

Single Tubes

Single (1956 NOS+)

Philips ECC83 12AX7 Foil D 45° Getter 17mm Long Plates mC2 - Single Tube - Heerlen, NL '56 - NOS+

$425.80

Professional Tube Testing

This tube was tested and certified by RoeTest V11 Professional Tube Testing System with the following result:

Tube 1:

Measured transconductance(GM): 1.79/1.88 mA/V - 112%/118% (100% = 1.6 mA/V)

Measured plate current(IA): 1.42/1.6 mA - 118%/133% (100% = 1.2 mA)

NO shorts, leakage or gas. NO noise or microphonics.

Curve trace is also included in the original RoeTest report.

Appearance & Cosmetic condition

This tube stands out aesthetically among the vintage tubes with pristine cosmetic condition. Nearly 100% of the silkscreen is well preserved.

mC2 ⊿6L (mC2 = ECC83 Long Plates production gen #2, ⊿ = Heerlen, 6 = 1956, L = December)

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Philips ECC83 12AX7 Long Plates D-Foil Getter mC2 - Heerlen

Delivery and Shipping

Tube Care & Handling