[MrFixr55]

Push Pull does better, but requires a method of phase inversion. This costs money. I have a Coronado battery farm set (2V A, 90V B), sold by Gamble Skogmo, a Midwest chain store, that had 2 950s in parallel. I need an output transformer and still have to make the oscillator work (mice ate the coil).

The 3Q5 develops about 250mW, so 2 of these will give you 500mW. The standard AA5 AC-DC set develops about 1 to 1.5W

I have 2 RCA Farm Sets 5BT and 6BT, that run on a 2V A Battery, 135V B Battery and -7.5V C Battery. These sets have push pull Class B outputs (a 19 for the 5BT and 2 49s for the 6BT. Each set puts out about 2W into an 8" speaker.