Quote:
Originally Posted by wa2ise
Why did they do that, vs just use a 12SA7 pentagrid converter? Can't imagine that that would offer any performance improvement of significance for an AM radio. Avoiding patent infringement? Or they just had a ton of 12SG7s and 12J5s to use up?  |
I'm trying to remember what the advantage was, but I understand there was one.
Most of the hotter radio's of the day, used a separate osc and mixer, especially the multi-band sets, even though, they didn't have an RF stage.
The earlier Hallicrafters receivers used a 6K8 or a 12K8, pre-war. The tube manual shows a separate triode and hexode, with a common cathode.
Anyone, feel free to correct me on this, so we all know!
