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Organization: Alexa Crawls
Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
Collection: Alexa Crawls
Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period.
TIMESTAMPS
I
am not an audio mania. But as a radio amateur, I have made some type of
audio AMP's. Many textbook said to me that negative feedback reduces a
distortion of audio AMP. One day, I wanted to confirm it. I went to the
city named AKIHABARA and I wanted to buy the distortion meter. But it cost
$1000's. Therefore I decided to make it by myself. See fig 1! That is all
the circuit of my distortion meter. Oscillator unit must product the sign
wave as pure as possible. This is constructed by the Wien oscillator (
I have visited Wien about 10 years ago as my honeymoon. That is very beautiful
city! Ich habe nach Muenchen bezuchen, sher shoen Stadt! ). The gain of
it is controlled by photo resister. It products 333Hz signal. this signal
is purelified by two stage low pass filter. And it is inserted to the measured
AMP. The gain control unit works only as a adjustable attenuator. And the
basic wave of 333Hz is omitted by the eight stage high pass filter. After
that the harmonic power of the 333Hz is selected. The meter unit displays
the strength of this harmonic power. A switch is used to compare the harmonic
power with the basic signal.
hizumi3.gif