EL84 Philips rare D-getter pair dates 1956/1957 v18/v28

245,00

Highlights

    • D-getter
    • Excellent matched pair
    • Best sonics
    • Date 1956 & 1957 

Out of stock

Description

Here is a matched pair of ultra rare EL84 D-getter tubes made by Philips in Sittart, Netherlands.

Detailed description

Here is a pair of Philips EL84 produced in the 50’s in the Philips factory in Sittart, Netherlands. The tubes were thoroughly tested and have excellent electrical values (note test results below). Very strong tubes!  Please not that the earliest EL84 type rX3 of 1956 is not  equipped with the cooling vins (see pictures)!

These D-GETTER Philips EL84 tubes are loves for their warm realistic sound and considered as one the best sounding EL84. 

Test method

Mutual transconductance, plate current, gas and shorts tested with: AVO CT-160 (Dutch army tester), Utracer3+, Philips 1532, RFT stabilised power supply and 2x Keithley 2700. Test conditions: Anode 250V, Screen 250V, Grid -7.3V, Filament 6,3V, Rated Ia = 48mA, Gm = 11,3 mA/V. AVO Valve Data Manual 23rd edition 1981 Before testing they were burned in for 48 hours.

Test results*

Valve 1

V18

Ia (plate current):

Transconductance (Gm):

Gas test, Shorts test:

48 mA      

11,3  mA/V

OK 

= NOS

= NOS

 

Valve 2

V28

 Ia (plate current):

Transconductance (Gm):

Gas test, Shorts test:

46 mA

11,0  mA/V

OK

= NOS

= NOS

 

* Please have a look at the test notes  !

 

Summarized description

Tube type EL84
Quantity of Tubes One pair
Brand Philips
Manufactured by Sittart, Netherlands
Date code rX3 X 6L  rX3 X 7D  (1956 & 1957)
Plate Construction Grey plate
Getter Construction D getter (see pictures)
Print Condition Bad; see pictures
Box included Generic boxes
Equivalent tubes:  CV2975 6BQ5 7189 E84L
General test results  NOS                 
Please study photos carefully; what you see is what you get! Ask any questions before bidding.

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