What should the bias be set to when using KT 88's?
2 posters
Bias voltage for KT88s on an ST-70
polarflux- Posts : 49
Join date : 2010-02-12
Location : Alaska
Bob Latino- Admin
- Posts : 3262
Join date : 2008-11-27
Location : Massachusetts
First of all in an ST-70 you must have an upgraded power transformer (which you do) to run KT88's. KT88's use about 35% more current than an EL34 and can damage the power transformer in an original ST-70 with a stock PA-060 power transformer.
Bias KT88's at .500 VDC in any VTA boarded ST-70 with an upgraded power transformer.
Bob
Bias KT88's at .500 VDC in any VTA boarded ST-70 with an upgraded power transformer.
Bob
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