E88CC E188CC 6DJ8 ECC88 6922 SQ PHILIPS two stars MATCHED PAIR NOS 2pcs

Gold pins,10000 h,grey anode plates,D geter,tested

EXTRA RARE MATCHED PAIR !!!! EXTRA TUBES GREAT SOUND!!!!!!

Many e88cc tubes needed to pair this pair matched to several criteria: date of production - same series and electrical characteristics. such pairing is rare !!!

All the tubes that were sold worked for 72 hours on the aging device to stabilize and in order to capture the characteristics. otherwise, in practice, some tubes quickly change the characteristics that deviate from the given values of the anode current Ia. there can be a misunderstanding. so the tubes are allowed to work 72 hours in order to get as much to their proper characteristic.

They are also tested for gas, short and leakage

Note: The measurements were carried out with Neuberger RPM370 saw and guarantee for this measurement. The tester has its technical and electrical characteristics that participate in the activities and measuring tubes. Each tube is a special electric circuit that works in conjunction with the saw and this gives measured values. Power saws with classic rectifier and everything else and it has its own impedance, etc ... Digital testers can not give the same measurement results as the classical tester for impedance, reactance, capacitance, conductance, the mode power supply - Switching etc .

Date code: All tubes 7L4 / triangle8J and  etched for glass

Tested for NEUBERGER RPM370,Ua=100V,Ug=-1.2V,Ig=16mA=100%

Ia = 16/15mA and Ia = 16/15.5 mA