Two RCA 7199 Tubes Match Construction Foil O Getters GM%: 81/93 84/91 AMPLITREX
Two Excellent RCA 7199 Tubes. This Set has a Good Match, Especially, Being Tested on the AMPLITREX AT1000 Tube Tester. AMPLITREX AT1000. "O" Getters with Foil. RCA Acid Etch. These Triode/Pentode Tubes are Very Hard to Match.