Unofficial Austrumi Linux for English users forum golf & dvd

A Latvian and english Linux tiny operating system. used by golf & dvd lovers

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#1 2011-12-23 03:49:44

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

Hobbyists' media reproduction system design ?

Ever since VCR won the court battle for the right to reproduce movies for home personal use, we all own many consumer devices. some obsoleted, some worn out. But the latest DVD player with remote is only $20 at drug stores. It plugs into a TV.

The VCR is still good for analog TV. Some new combo that can duplicate(dub) VCR as well as DVD are for digital TV. Some analog VCR tapes may have no signal problem in conversion errors. But it is usable sort of. The old analog TV system with media duplication only had to add a DTV converter to make it current in technology upgrade.

So, many equipment of ten years old are valued investment if it can be added into your analog TV system. Analog and digital equipment can be mixed. The new digital equipment is much cheaper to own today.

So, I have designed my analog TV system with the Zenith DTV converter(most sensitive DTV tuner) and use a coupled antenna. Two rabbit ears and two UHF bow tie clipons in parallel(impedance matched onRF coupler) to get  out of state(RI) stations from Massachusetts. Then feed thru analog VCRs to analog TV for the weak RF signal amplifiers in VCRs into analog TV tuner(channel 3). I also have a toshiba DVD player that has five disks(4 hour per disk play time). that feeds into the VCRs to copy DVDs on tape.

Interesting TV systems on older equipment. Newer digital TV systems will be much cheaper now a days, but you need combos.. However VCR equipment is a must have component for cheap media acquisition..

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2011-12-23 03:49:44

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#2 2011-12-31 08:34:43

atang1
Administrator
Registered: 2006-03-30
Posts: 2705

Re: Hobbyists' media reproduction system design ?

In other words, UHF antenna in parallel connected by RF couplers then feed through a vcr to amplify RF signal to DTV converter can make TV watching much more interesting. More stations and less distorted pictures due to weak signals jammed by OFDM complexity.

How to use VHF rabbit ears and UHF bow tie antenna combination? shorten the rabbit ears to minimum length then clip bow tie UHF antenna in the middle of the length.

To research in antenna requirement, and weak RF amplifiers(analog vcr front end, 3 db gain) used, OFDM signal on Wifi antenna; quality of links maybe improved.

This is saying antenna amplifiers are often too much amplification for RF tuners. Not enough feedback(or differential amplification) or SAW filter to control noise. 15.5 db gain has 3 db(double) gain of noise. over sampling can cut noise down 96db.

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