EL34 metal base Philips Miniwatt HOLLAND NOS specs 1955! v142

Description

Here is a metal base Philips Miniwatt EL34 tube;  disk getter

Detailed description

The Philips Miniwatt, Holland made metal base EL34 is one of the most desirable EL34 ever produced. The tube has date code 5M SYA, which puts the production date in 1955. The tube is probably NOS and has NOS specs. These are the King of the EL34. Introduced in 1953, the metal base EL34 was the first version, and some say the best sounding, of the EL34 / 6CA7 family of tubes.

The metal base Philips Miniwatt EL34 is considered by many as the best sounding of all EL34 tubes ever. 

They deliver superior sonics. I refer to the many reviews on the web.

The tube has NOS test values and is probably NOS. 

Note: my tubes are often not the cheapest. But is very hard to find better tubes !

Please read our test and shipping policy before buying !

Test results*

The measurement data below show that the tube is in excellent condition. 

Valve  V116

Ia (plate current): Transconductance (Gm): Gas test, Shorts test:

112  mA 11,2  mA/V OK

>  NOS >  NOS

* Please read our test and notes !

Telefunken measuring values for new unused tubes:

• The rated emission value for a new EL34 is:  100 mA. 
• The rated transconductance value for a new EL34 is:  11 mA/V . 

For Telefunken specs info see last picture 

Test conditions & equipment:

Mutual transconductance, plate current, gas and shorts test equipment: AVO Mk IV (Dutch army tester) , AVO Valve Data Manual 23rd edition 1981, RFT stabilised mains, Utracer3+, Philips PE 4832, 2x Korad KA3005P programmable power supply, 2x Keithley 2700 and 2x Fluke 145. 

Test conditions: Ua (plate voltage) = 250 Volts, Us (screen voltage) = 265 Volts, Ug = -13,5 Volts and Uf = 6,3 V ± 3% (factory conditions). Please read our test page.

Summarized description