10-30-2006, 09:36 AM
Hi Madghost
The early 70 and early 90 (using two Type 45 output tubes) share the same front end, and neither have AVC.
The "mid" 90, the most common version with a single Type 47 output, uses AVC which makes a HUGE improvement in performance; i.e. no "blasting" as you tune across the dial, and less prone to fading.
The late 90 (push-pull 47 outputs) and late 70 both have autodyne converters, and both have AVC, so again their front ends are similar.
Both are good performers. To make a long story short, the 90 has extra amplification in its audio section. It is slightly larger than the 70. And there is just something special about it, I guess, that makes it more desirable.
The early 70 and early 90 (using two Type 45 output tubes) share the same front end, and neither have AVC.
The "mid" 90, the most common version with a single Type 47 output, uses AVC which makes a HUGE improvement in performance; i.e. no "blasting" as you tune across the dial, and less prone to fading.
The late 90 (push-pull 47 outputs) and late 70 both have autodyne converters, and both have AVC, so again their front ends are similar.
Both are good performers. To make a long story short, the 90 has extra amplification in its audio section. It is slightly larger than the 70. And there is just something special about it, I guess, that makes it more desirable.
--
Ron Ramirez
Ferdinand IN
