Passive Microphone Mixer

I figured out this circuit when a friend of mine was asking how to connect 2 microphones into a single channel small audio mixer (behringer Small Mixer). Basically what the circuit does is to combine both microphone signal (unbalanced input) and feed them into single (unbalanced) output. I’m not sure whether this will work and whether it is necessary to join A and B with 10K resistor (will it short circuit the output?) but, hey, you can only know when you try them. Guess what? Yes or No. In actual fact, it doesn't short circuit, the circuit has been tested and currently in used at the Government Radio Station.

PORTABLE MINI GUITAR AMPLIFIER

METEO -45MP

This is the big brother of the tiny guitar amplifier (previously posted at LucnSam Electronics) designed,  made and supply by LucnSam Eletronics. It measured 4" x 2" x 1.6" and sound almost 3db louder than the tiny amp. It still use 9V battery to operate and headphone socket is features in this model so you can practice in peace and also a DC external 9v supply input.

The next model to come very soon will have 3 Band EQ to add spice to amp as well as effect processor such flanger, Metal, Reverb and chorus.