[Adam.S]

Hey guys he streets of Mosman have done it again , these people throw away the best stuff, and that brings me here. As I collect vynle records I seen a create out the front of a house that looked like a record stash, I grabbed it and when I got home relised they where those large video lazer disc, no use to me but may be to you guys. Any one interested? let me know theres a few of them.
Cheers Adam.

[Paul]

That has got to be a great find, surley someone out there has a player.
Paul OM.

[Darth Wolfenstein]

you called horace has a laser disc dvd player

Wolf

[Shmi]

Darth Wolfenstein, on 30 December 2010 - 07:30 PM, said:

you called horace has a laser disc dvd player

Wolf

Very handy - The record clearance store in the Station Street Plaza in St Marys has for sale a full set of Star Trek Laser Discs - still in their original packaging for $395.00. I think there is about 15 discs in total? He tried to sell them to us just yesterday.

He has other Laser discs too!

[Darth Wolfenstein]

cheers Rhonda for that i love them my self hard to belive they was around in the 80's when cds was around but never took off think horace has about 4 laser discs thou

but if any one comes across the old quad speaker with turntable /amp and cassete deck let me know and i take it of ya hands for free is hard to explain and cant find a pic i think they was brand called arena or such lol

[Shmi]

Darth Wolfenstein, on 30 December 2010 - 08:58 PM, said:

cheers Rhonda for that i love them my self hard to belive they was around in the 80's when cds was around but never took off think horace has about 4 laser discs thou

but if any one comes across the old quad speaker with turntable /amp and cassete deck let me know and i take it of ya hands for free is hard to explain and cant find a pic i think they was brand called arena or such lol

We actually have a set from the 70's.

The thing of which you speak is called "Quadrophonic"

The unit we have is JVC Branded and the turntable actually has a stylus pick up that reads 4 individual tracks on an LP that has the Quadrophonic encoding and is the system described below. It isn't actually hooked up anymore. The technology has all moved on in the past 35 years! The speakers we bought in 1976 are still performing on our 5.1 JVC Amp that is connected to our TV at the moment. We still have a half a dozen or so CD-4 Records and the stylus and could in an afternoon or so set it all up and make it work.

CD-4 (Compatible Discrete 4)

Compatible Discrete 4 (CD-4) or Quadradisc (not to be confused with compact disc) was introduced in 1971 as a discrete quadraphonic system created by JVC. Record companies who adopted this format include Arista, Atlantic, Capricorn, Elektra, Fantasy, JVC, Nonesuch, RCA, Reprise and Warner.

This was the only fully discrete quadraphonic phonograph record system to gain major industry acceptance.

In the CD-4 system, the quadraphonic audio was divided into left and right channels with the left recorded on one groove wall and the right on the other, which is the case with normal stereo. The audio frequencies (20 Hz to 15 kHz), often referred to as the sum channel, would contain the sum of the left front plus left back signals in the left channel and the sum of the right front plus the right back signals in the right channel. In other words, if you looked at the audio frequencies only, you had an ordinary stereo recording. Along with this audio, a separate 30 kHz subcarrier was recorded on each groove wall. The subcarrier on each side carried the difference signal for that side. This was the information that enabled a combined signal to be resolved into two separate signals. For the left subcarrier it would be left front minus left back, and for the right subcarrier it would be the right front minus the right back. These audio signals were modulated onto the carriers using a special FM-PM-SSBFM (frequency modulation-phase modulation-single sideband frequency modulation) technique. This created an extended subcarrier frequency range from 18 kHz to 45 kHz for the left and right channels. The algebraic addition and subtraction of the sum and difference signals would then yield compatible and discrete quadraphonic playback. CD-4 was responsible for major improvements in phonograph technology including better compliance, lower distortion levels, pick-up cartridges with a significantly higher frequency range, and new record compounds such as Q-540, which were highly anti-static. A typical CD-4 system would have a turntable with a CD-4 cartridge, a CD-4 demodulator, a discrete four-channel amplifier, and (ideally) four full-range loudspeakers. Some manufactures built the CD-4 demodulator into complete four-channel receivers.

Simply put, CD-4 consists of four recorded signals (LF, LB, RB, RF) and the following coding matrix, similar to FM broadcast stereo multiplexing.

The CD-4 encoding/decoding matrix:

* (LF+LB)+(LF-LB)=2LF or left front
* (LF+LB)-(LF-LB)=2LB or left back
* (RF+RB)+(RF-RB)=2RF or right front
* (RF+RB)-(RF-RB)=2RB or right back

Although CD-4 (and quadraphonic audio in general) failed due to late FCC approval of FM quadraphonic broadcasting, the improvements CD-4 engendered spilled over into, and substantially improved, the production of conventional stereo LP records.

Oh ....

.... and we are not giving it away.

Read all about it here!

[Darth Wolfenstein]

thts it i had one in parkes but the ex wife took it with every thing esle i had back then and love to have one again

i still have the records for that system called a experiemnt in sound or such where u hear him in all 4 speakers and such was great fun as kid and hearing them on the 2 speaker system i have but not as good

Wolf

[Adam.S]

So would Horace like them there is a whole milk crate full, ?
let me know ad they are his.

[Darth Wolfenstein]

yer mate i ask him in the morn when i go shopping with him and send ya a pm on here asap

[Adam.S]

No probs, also free of charge , LOL

[Darth Wolfenstein]

i wont tell him that i say for a few longnecks ;)

[Adam.S]

LOL I dont drink LOL I just want them out of my way LOL.
Cheers