Various misspellings of the esteemed beast's name include:

• Melotron
• Melatron
• Meletron
• Melotrone
• Melatrone
• Meliotron
• Mellatron
• Melletron (Thanks, Mike Scott...)
• Mellodron
• Mellotrone
• Mellotrane
• Melletrone
• Mellontron
• Mellotrom (1st Rainbow LP - hang your head in shame...)
• Meloton (cheers, Cliff...)
• Mellitron

And on the Chamberlin front...:

• Chamberlain: this is actually more common than the correct spelling...
• Chamberline
• Chamberlein

And finally, one from the land of the Novatron:

• Novotron

No Birotron misspellings yet. Beggars belief really, doesn't it?