Johnny Suparman (@jsuparman)

I have already praticing Electronics Enineering since 1969 ( I was 14 yrs old), was started in making Cristal-Radio and Super Heterodyne Transistor Radio, vacum tube amplifier, Vacum tube Transmitter for 75 meter Bands, and so for. EE and Computer Engineering are my hobbies, so that I always eager to be uptodate in this science.

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