I called Grant Fidelity today and left a message, no reply yet. I'll send an email and if no response I'll see if Israel Blume is selling them. I've had the CSL for nearly 5 years and will likely have it for 20 years or more. May as well get the best 101d tubes currently available and be done. Using premium 300b tubes surely make an undeniable improvement with my SET amplifier. David and Pap's enthusiasm have gotten my attention
Charles,
Charles,

