04-02-2015, 07:30 AM
Back in the early days there weren't many choices!!! A little odd as I don't think I've seen a TRF set w/227 as the rf amps. The 24A was just coming out as the superhets were slowly becoming popular, about 1929. In a set it was a big selling point having these new fanged SCREEN GRID tubes. And have a screen grid meant having more gain. Mostly seen in TRF sets 226's 24A's and 201's and 222 on the battery sets.
Have fun chasing electrons!
Terry
Have fun chasing electrons!
Terry