[Music in a bottle]

I understand capacitors rectifier tubes and resistors, but am unsure what the other tubes in the set are doing, such as the #24 and #27 tubes. I could also use a better understanding of the tuning process for these AM radios. After experimenting with soldering on some piece of crap radio I have, I quickly realized that I certainly need practice here too. I might need to find an antique radio buff in my area, to hold a soldering workshop clinic! Thank you Exray, for the link. I always find this info so fascinating. By the way....What projects are you involved in now?