KT88 Tube MARKII Classic Version KT88-TII Replaces KT120 6550 KT90 for Vacuum Tube Amplifier HiFi Audio Amp Exact Match (Color : 2pcs Matched Pair) : Amazon.co.uk: Musical Instruments & DJ
LC KT90 Push-Pull Amplifier
KT90 EI Yugoslavia Platinum Matched Quad dual OO getter used tested 80-85% | eBay
Russo EH KT90 tubo a vuoto valvola di corrispondenza di precisione sostituire KT88 KT150 EL34 6 l6 6550 6 ca7 KT77 tubo elettronico per amplificatore
Ei Yugoslavia KT90/KT99 Type II 2 Tubes, 95%-102% Emission, Near NOS, Out of Production for Audio Research, VTL or Air Tight, Audio, Other Audio Equipment on Carousell