Japanese word "Musenka" has two meanings.　One meaning is "A poor person" and the other meaning is "A person who loves radio wireless".　Actually, these are the different word each other at all and written with different letters. Only their pronunciation are the same. 

Japanese radio amateur sometime call themselves "Musenka" that means "Poor person". It is partly a joke. But I think when they call themselves so, they have spirit that they will enjoy radio wireless with ideas and inventiveness even if they have no money.

Poor author also wants to be such a  "Musenka". So, I tried to make tube pocket portable radio with inexpensive and easy obtainable parts as best as I can.