I ask this question out of pure ignorance! I run a Drake TR7...a great rig with great audio on receive as well as transmit. However, my favorite is a (c.1963) Drake TR3. One is all transitor, the other, containing at least 20 tubes. Why is it that the tube rig has a much more mellow and rich receive audio and very good audio reports than the much newer TR7 (c. 1979) Shouldn't "newer" be "better"