Dinky little 2-valve Chinese pre-amp

[Nick]

Yorkie wrote:

as Tony will know, there was a dinky solid state home-brew mono/stereo pre-amp design in Winter 2011 BVWS Bull, with full constructional details, PCB and so forth.

Yes, I vaguely recall that, David!
Looks like your little amp is indeed at line level and would require pre-amping for, say, a magnetic pick-up cartridge.
This is clearly a fun object with no hi-fi pretensions. Lighting up the valves with blue LEDs would tend to give the game away, rather...
Perhaps I've missed something along the way (not unusual). Assuming it isn't just for headphone use, how are the loudspeakers coupled? Is it capacitive, or if not, where are the transformers? And how much power output could one reasonably expect from such valves, driven as they seem to be by very modest HT?
Tony

Its definitely line level - the 6N11 in this configuration has decent current gain - input sensitivity is likely to be around 200mV and with only 20mW/chan RMS out, its really just a line headphone amp/buffer - the output is capacitively coupled as per the schematic I posted above.

The blue LEDs are just a bit of fun - they make the valves look cool in some people's eyes - there are plenty of "high end" valve amps that do the same - its no indication of quality/lack of quality. This is done with nixie clocks etc. all the time (excuse the pun!) - orange (neon or heater glow) + blue (LED) is a decent combination...

Fun? Yes. HiFi? No.