Reporting question for Vacuum Tube - EL84, Tube Amp Doctor

Product:
Vacuum Tube - EL84, Tube Amp Doctor

Question:
Are the tad tube set for the peavey classic 30/50 compatible with the delta blues? I've read on tad website that the classic will need bias adjustment but it doesn't say so on the delta blues. Also, on their website, there seems to be a different preamp tube as well as a pair of 12ax7wa PS tubes. Just wondering before I buy. Oh and are these premium selected tubes or not on the power section. Thank you so much for your time.

Answer:
The TAD tubes are all premium selected and tested rigorously. In terms of the bias adjustment I always go by the rule of thumb that a bias adjustment may be required when changing output tubes. Many El84 based amps do not require bias adjustments but I would suggest contacting Peavey directly for the details.