unknown: LW/MW SG3 kit

Probably the design was originally three tubes, the base board hardly fits four and one transformer and socket seems later type.

So wired as a three valve (tube) kit Radio. Osram VS24K as RF "SG" Tetrode, HL210 Triode as Regenerative amp and detector, Mullard PM2 Triode as output. VS24K g2 volts is 60, all other HT is 120V. The PM2 has  -9V grid bias. The "Ever Ready Sky Queen" box behind is a spare (no radio or amp in it!) with a 240V to 6V transformer (as an audio transformer) driving a 1950s 4 Ohm moving coil loudspeaker (2n2F snubber/tone correction on primary). There is no amplification in it. It's instead of 4K headphones,

Video Demo using extension telephone bell with a floppy paper cone as a 3600 Ohm "reed armature" speaker.

I have no high impedance phones, so I used a transformer and moving coil speaker for a longer video demo after dark (no daytime MW here in Limerick, Ireland).
 

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