Siemens Trabant RC 601 German vintage portable cassette tape recorder from 1979.
WOW! This recorder was got for me by a friend who went to see her friend in Germany, and lo, and behold, she found 2 cassette recorders there at their house--this one and a Grundig C402. This is a presentation of this very nice recorder with all the manuals and paperwork to it. It is AC bias and of good quality.
This is a much longer LPC-10 speech synthesis video, this time using the SOX command-line audio program, which is able to to linear predictive coding. The file was played back straight from the computer, and NOT from EPROM, as the formate produced by it does not seem to be compatible with the TMS5220 synthesis IC. Either way, it is amazing.
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https://www.youtube.com/watch?v=BMppM8tIFCw
Number 42, the answer to life, the universe and everything? Well, dear Christopher, this is number 42 from the 200-in-One Electronic Project Lab Kit from RadioShack/Tandy Corp.
This is not constructed on the original kit, which I dismantled years ago for parts. This is constructed on solderless breadboard, which was one of the greatest inventions since sliced bread.
I am not the author of the circuit design, nor the text. Of course. It should be painfully obvious. But I state it for disclaimer reasons. I am simply reading it and building its circuit. Silicon diode has a voltage drop.
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https://www.youtube.com/watch?v=u9xTYdZqFE0
A vintage Symphonic stereo with AM/FM Stereo/8-track/phono. I had to fix the program change circuitry on the 8-track player.
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https://www.youtube.com/watch?v=_7hTVT85yCI
Some old Bell Telephone stuff. A building was being renovated for a church meeting hall, and some old telephone equipment had to go. This is one of the old things I rescued. It has five circuit boards, very "Western Electricy", of a fascinating build style. WE components are weird, the boards are weird with 90° bends, and it is built extremely well.
I think the module these boards were in is for decoding touch-tone signals, as it is called "TT ADPTR". The other module, with some relays and capacitors, has a special 10-position switch, I believe actuated by pulse signals from rotary-dial telephones. I plan to later remove that and make a video on it.
Beautiful stuff, amirite?
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https://www.youtube.com/watch?v=bMaBP2mrD0c
Yes, this is from 1959!!!!! This is a classic recorder and said to be the first transistorized tape recorder.
AC bias
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https://www.youtube.com/watch?v=ofQ5X67p8E8
This is official presentation of this recorder, which was the one restored in "Project Tape Recorder". I have also recorded Flying Battery zone, act 1 song.
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https://www.youtube.com/watch?v=SNp2eOHpDJk