GEC VT104 10E/215 PT15

Direct heating pentode

perfectly matched pair of tubes

5-Pin B5 base top contact with a cap
 Vf 6 Volts If 1.3 Ampere Direct heating

The PVT104 is an excellent audio performance and sound quality true pentode tubes.

 The plate capacity is 30W and the screen grid loss is 15W

the total power capacity has an allowable loss equal to 300B tube, 

but I personally prefer more punchy and dynamic sound of VT104

really great sounding audiophile tubes.

I think these are the best sounding pentodes I've ever heard.

uncomparable better than EL34 or KT88

I can't be sure, but I think the tubes have never been used

great looking, perfect 100% emission

tube 1 - Ia=40mA

tube 2 - Ia=40mA

where 40mA is 100% for the new tube.

the best version of the tube with ceramic base, black anodes double reversed cup getter.

Great sounding true pentode

you can hear the tubes in Yamamoto Sound  Craft A-04 amplifier

and others