Ei
Ei tubes are made at the Ei factory in Niš, Yugoslavia. This vacuum tube factory was founded in 1951 and employed the use of Philips technology. In the 50'sproduction was mainly geared towards radio and TV tubes. Today, Ei specializes in the production of vacuum audio tube types and the quality of their tubes is second to none.
 ei elite low noise 12ax7e tubes new six 6  US $51.00
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 1965 Pair EI Philips 6BQ5 EL84 Tubes Tested Excellent US $39.95
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 2 NEW Ei 6CW5 EL86 AUDIO POWER AMPLIFIER TUBES US $12.99
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 Quad PL519 40KG6A Ei Yugoslavia NOS NIB US $99.00
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 Ei 12AX7 ECC83 Tubes NOS Matched and Balanced Set C US $59.95
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 3 EI ECC83 Tubes 12AX7 US $20.00
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 PCC88 SIEMENS Ei ECC88 6DJ8 LOT OF 2 US $24.99
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 Vintage EI Tube GC 10 D Tube GC10D US $9.99
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 12AX7 ECC83 tubes 4 pcs Mullard Amperex Ei US $.99
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 PCC88 Ei PHILIPS NIB TESTED MATCHED PAIR ECC88 6DJ8 US $49.99
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 4Pcs NOS EI 6CA7 EL34 OO Getter US $249.00
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 Perfect Gain Matched pair identicalNOS EI ECC83 12AX7A US $49.95
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 Matched pair NOS EI ECC83 12AX7A almost perfect labels US $48.88
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