
bobbtoz
Active member
I've been using a Weber Bias Rite for years and never had an issue biasing my amps until today. Just purchased (2) matched tubes from Doug's tubes EL34 BHT ma-43.1 and ma- 42.9. Popped the tubes in 20-30min warm up and here's my readings on my Bias Rite:
Tube A- Vp- 456/ Ik- 39.4
Tube B- Vp- 469/ Ik- 49.4
The measurements are with the trim pot turned all the way down!
Amp- 50 watt JCM- Cameron Jose Mod (owned this amp for years w/ no issues)
Current Amp Tech is 5-6 weeks back logged, so hope I don't need to go that route.
Any thoughts/ suggestions?
Thanks
Bob
Tube A- Vp- 456/ Ik- 39.4
Tube B- Vp- 469/ Ik- 49.4
The measurements are with the trim pot turned all the way down!
Amp- 50 watt JCM- Cameron Jose Mod (owned this amp for years w/ no issues)
Current Amp Tech is 5-6 weeks back logged, so hope I don't need to go that route.
Any thoughts/ suggestions?
Thanks
Bob