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Philips

Philips EL84 6BQ5 Matched Pair - Heerlen, NL 1969 KM4 - Low Paint Special

Philips EL84 6BQ5 Matched Pair - Heerlen, NL 1969 KM4 - Low Paint Special

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Sound Sample:

Product Summary

Model: 1969 Philips EL84 6BQ5 (Made in Holland)

Soundlumia Tube Sound Rating9.0/10 - Outstanding 
Date codes:
KM4 𝛥9H1 (KM4 = EL84 production gen #4, 𝛥 = Heerlen, Holland, 9 = 1969, H = August, 1 = Week 1 of production month)
KM4 𝛥9H2 (KM4 = EL84 production gen #4, 𝛥 = Heerlen, Holland, 9 = 1969, H = August, 2 = Week 2 of production month)
GM (Mutual Conductance) test result: 93%/91% of NOS/NEW

Silkscreen: 90% - 100%

PackagingNEW reproduction Phillips tube boxes.

Professional Tube Testing

This set was tested and certified by RoeTest V11 tester with the following result: 

Tube 1: 

Measured transconductance (GM): 10.51 mA/V  - 93%  (100% = 11.30 mA/V)
Measured plate current (IA): 39.07 mA  - 81%  (100% = 48 mA)

Tube 2:

Measured transconductance (GM): 10.25 mA/V  - 91%  (100% = 11.30 mA/V)
Measured plate current (IA): 47.17 mA  - 98%  (100% = 48 mA)

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

Curve trace is also included in the original RoeTest report.
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