E88CC SQ Philips Miniwatt Heerlen both 1966 NOS/NIB (V331/332)

345,00

Highlights

  • Heerlen production
  • NOS in original packaging
  • matched and balanced pair > 2%
  • grey shield
  • excellent print

1 in stock

Description

This pair early Philips Miniwatt E88CC SQ tubes is made by Philips in the Netherlands (Heerlen plant).

These Special Quality tubes have a grey shield and halo-getter. The very strong tubes have balanced systems and have perfect tube-tube match; better than 2% match !! Both tubes are manufactured in 1966 (5 weeks after each-other). 

Very reliable, long life and low noise version of a ECC88 tube which is mostly used for military, professional or postal purposes.The properties of the /Philips E88CC SQ are legendary and widely known. I refer to the many threads on the web for more information. 

The tubes are thoroughly tested. The matched pair has strong test values that match the factory specifications extremely well and and both tubes have balanced systems. See test results below.

Test results

The measurement data below show that the tubes are matched and internally balanced; all better that 2%. 

Valve 1

V331

Ia (plate current):

Transconductance (Gm):

Gas test, Shorts test:

15,2 /15,2 mA   

14,3 /14,2 mA/V

OK

=  NOS / NOS

=  NOS / NOS

 

Valve 2

V332

 Ia (plate current):

Transconductance (Gm):

Gas test, Shorts test:

15,4 /15,3 mA

14,4 /14,5 mA/V

OK

=  NOS / NOS

=  NOS / NOS

 

Test methods and reference values are outline on the Tube testing page.

 

Summarized description

Tube type E88CC
Quantity of Tubes One pair
Brand Philips
Manufactured in Heerlen Netherlands
Date code 7LD Δ 6D3  &  7LD Δ 6E34
Plate Construction Frame grid with Grey shield
Getter Construction Halo getter
Print Condition Excellent; see pictures
Box included Original packaging (military?)
Equivalent tubes:  CCa 6922
General test results  NOS 
Please study photos carefully; what you see is what you get!
Ask any questions before buying. Thanks

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Additional information

Weight 50 g
Dimensions 15 × 3 × 3 cm