Next grade up from ECC88/6DJ8, E88CC/6922 tubes are rated for higher voltage and dissipation (220V/1.8W versus 130V/1.8W for ECC88/6DJ8). Designed for longer life, low noise and lower microphonics these can be used for all ECC88/6DJ8 applications. Also check PCC88 7DJ8 Category. Also check next higher grade:
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