5814A pair Sylvania NOS, 1964 V226/228

115,00

Highlights

  • USA production
  • NOS in original box
  • matched and balanced pair > 5%
  • long plates
  • copper grid posts

1 in stock

Description

This NOS pair 5814A tubes is made by Sylvania in USA. 

This military spec 5814A is a premium quality 12AU7A tube made by Sylvania. They have long grey plates (USA tube) with copper grid posts and a halo getter with typical support construction. The 5814A is a very reliable, long life and low noise version of a 12AU7A tube which is meant for military, professional or postal purposes. The tubes are manufactured in the sixties.

The sonic properties of theSylvania 5814A are highly regarded for e.g. musical instrument amplifiers. One of the more dynamic 12AU7A’s. I refer to the threads on the web for more information. The pair combines two very strong tubes with balanced systems and a perfect tube-tube match.

This pair is thoroughly tested. Both tubes match the factory specifications extremely well. Both tubes have balanced systems. And the tubes form a perfect pair.

See test results in the section below.

Test results

Test methods and test conditions are outline on the tube testing page.

The measurement data below illustrate that the tubes are matched and internally balanced; all better that 5%. 

Valve 1

V226

Ia (plate current):

Transconductance (Gm):

Gas test, Shorts test:

8,8 /10 mA   

 1,8 /2,1 mA/V

OK

=  NOS / NOS

=  NOS / NOS

 

Valve 2

V228

 Ia (plate current):

Transconductance (Gm):

Gas test, Shorts test:

  9,9 /9,8 mA

2,4 /2,4 mA/V

OK

=  NOS / NOS

=  NOS / NOS

 

(Telefunken factory specification see test page)

Summarized description

Tube type 5814A
Quantity of Tubes One pair
Brand Sylvania
Manufactured in USA
Date code Not readable 
Plate Construction Long grey plates
Getter Construction Halo getter
Print Condition Mediocre; see pictures
Box included Original packaging (military?)
Equivalent tubes:  12AU7, ECC802S, ECC82, 13D8 , CV4003, CV491, 5814 , 7730, 5963
General test results  NOS 
Please study photos carefully; what you see is what you get! Ask any questions before buying. Thanks!

Please read our test and shipping policy before buying also !

Additional information

Weight 50 g
Dimensions 15 × 3 × 3 cm