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Thread: Involve CD4....Is there any life in it????

  1. #1
    700 Club - QQ All Star chucky3042's Avatar
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    Default Involve CD4....Is there any life in it????

    Dear surround extremists

    On another thread "Quadwreck" raised the topic of CD4 demodulators. I semi jokingly mentioned we would do it for US$100,000, even though I was joking the price was right in terms of a development and supply.

    So far we have 4 takers - making the per unit cost US$25,000 each (a bargain), I suspect this might be a little too high for most members of this forum.

    I have no commercial interest in any promotion of this dead format but I do admit it would be nice to complete the loop and do it anyway. Lou Dorren (RIP) attempted to get this going before he became ill...see:

    http://www.quadraphonicquad.com/foru...-4-Demodulator!!!

    Lets do a poll of how many QQ members would buy one of these, if we get 200 takers world wide suddenly the price would be $500 each- a more realistic figure.

    My best guess is we will get 20 takers, making the price $5000 each- not a proposition!

    If by some miracle we get 200 takers we will do the development (on 30% deposit) and if someone can find out Lou Dorren's next of kin we will send a 10% royalty to his family. We would call it the Involve - Dorren CD4. We would also update the process and take some bugs out of it.

    So I will tally up the numbers and post the figure and effective price. Feel free to post here or PM me.

    Call me crazy

    Chucky

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  3. #2
    300 Club - QQ All Star inquadwetrust's Avatar
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    Default Re: Involve CD4....Is there any life in it????

    I'm in.

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    Default Re: Involve CD4....Is there any life in it????

    I have no idea what this means. At all. But sounds crazy and interesting.

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    Board Operator JonUrban's Avatar
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    Default Re: Involve CD4....Is there any life in it????

    If there are 199 other takers then I'm in!
    :-jon

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    Default Re: Involve CD4....Is there any life in it????

    Change of mind, count me out.

    Many thanks.
    Last edited by proufo; 08-17-2015 at 05:34 PM.
    Pablo Roufogalis L.
    (The Ambiance Pariah)

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    Default Re: Involve CD4....Is there any life in it????

    Count me in. If the price is right I'll take two.

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    Default Re: Involve CD4....Is there any life in it????

    Count me in also. What a gift I you guys are able to pull this of.

    Would it be cheaper or feasible to incorporate cd4 decoding into an updated involve unit?

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    Default Re: Involve CD4....Is there any life in it????

    IM in

    On another thread "Quadwreck" raised the topic of CD4 demodulators. I semi jokingly mentioned we would do it for US$100,000, even though I was joking the price was right in terms of a development and supply.

    So far we have 4 takers - making the per unit cost US$25,000 each (a bargain), I suspect this might be a little too high for most members of this forum.

    I have no commercial interest in any promotion of this dead format but I do admit it would be nice to complete the loop and do it anyway. Lou Dorren (RIP) attempted to get this going before he became ill...see:

    http://www.quadraphonicquad.com/foru...-4-Demodulator!!!

    Lets do a poll of how many QQ members would buy one of these, if we get 200 takers world wide suddenly the price would be $500 each- a more realistic figure.

    My best guess is we will get 20 takers, making the price $5000 each- not a proposition!

    If by some miracle we get 200 takers we will do the development (on 30% deposit) and if someone can find out Lou Dorren's next of kin we will send a 10% royalty to his family. We would call it the Involve - Dorren CD4. We would also update the process and take some bugs out of it.

    So I will tally up the numbers and post the figure and effective price. Feel free to post here or PM me.

    Call me crazy

    Chucky[/QUOTE]

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    QQ King Lizard LizardKing's Avatar
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    Default Re: Involve CD4....Is there any life in it????

    +1 for the one CD-4 album I have...

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    Default Re: Involve CD4....Is there any life in it????

    Can someone give the Cliff's Notes on CD4?

    Thanks!

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    600 Club - QQ All Star sukothai's Avatar
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    Default Re: Involve CD4....Is there any life in it????

    I'm in 2 times.

  13. #12
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    Default Re: Involve CD4....Is there any life in it????

    I'm in maybe 2 can we have some input about out puts like xlr and pass through

    RoundhouseQuad

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    Default Re: Involve CD4....Is there any life in it????

    Id buy in a second!! I still have $600 i was saved for the Doren demod.

  15. #14
    formerly "quadwreck" too
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    Default Re: Involve CD4....Is there any life in it????

    I'm in for the $500 unit.

  16. #15
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    Default Re: Involve CD4....Is there any life in it????

    Hi. All
    This has got serious.
    You can count on me I`ll have one.......
    Someone how`s on other forums should spread the word.
    Bill...

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    700 Club - QQ All Star rustyandi's Avatar
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    Default Re: Involve CD4....Is there any life in it????

    First thing can anybody get Lou Dorren plans for the Demodulator?

    Next does any body know how many were ordered ?

    And of course I would Buy one

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    800 Club - QQ All Star bigbillquad's Avatar
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    Default Re: Involve CD4....Is there any life in it????

    I think from memory
    Luo made public PDF files on QQ of some schematics of Cd-4 Demodulator and information, I don't now if it is sill there I gees some one has down loaded them.

  20. #18
    700 Club - QQ All Star chucky3042's Avatar
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    Default Re: Involve CD4....Is there any life in it????

    Dear surround wacko's

    This is really getting interesting. In answer to the fine questions, we would incorporate all features as suggested by QQ members if practical.
    I think Bigbillquad is right that we will need to promote this concept to friends, relatives and enemies far and wide if we are to get the numbers to make it economically viable.

    As for you Rustyandi, I knew we would get you in on this!! If anyone has the schematics of Lou's great work, I would be pleased to check it out and see if it is suitable for manufacture and if it looks like it will work well. If it is just a case of doing a PCB design and encapsulation the price would be more like:

    US$20,000/ number of buyers + (component cost + assembly + Lou's family commission + as small profit for us greedy Involve capitalists).

    So YES lets find the schematics!!!!!! This sounds like fun.

    OK the tally so far is 16 volunteers - given if we do the R+D that translates to $100,000 / 16 = $6,250 each. Hmmmm still a tad expensive me thinks. If we can get Lou's correct schematics its more like $1,520.

    Lets see if we can increase the number of buyers and search for Lou's work. I think it is possible to achieve say $500 with a bit of team effort.

    Yours in a surround rapture

    Chucky

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  22. #19
    700 Club - QQ All Star chucky3042's Avatar
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    Default Re: Involve CD4....Is there any life in it????

    Guess what

    Here is the original schematics!!!!

    http://www.quadraphonic.info/manuals...ice_Manual.pdf

    Chucky

  23. #20
    600 Club - QQ All Star sukothai's Avatar
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    Default Re: Involve CD4....Is there any life in it????

    Post #1048 on the Lou Dorren: A new CD-4 Demodulator!!! thread has a link to the PDF of Lou's latest design.

  24. #21
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    Default Re: Involve CD4....Is there any life in it????

    If the price would be anywhere near $500 us, then I would be in.

    vinylguy4

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    Default Re: Involve CD4....Is there any life in it????

    Hello Chucky, interesting news, that you would make an attempt to complete the work of Lou Dorren. I have printed in the past all thes chematics or diagrams, which Lou has printed in the QQ forum for the new developed CD-4 Demodulator. If one can't found it now, I may send this to you. May be, this can help. Thes chematics of the 4 DD 5 are not the same.The new Demodulator should get new 35 dB channel separation instead of 30 or most less of the old Demodulators. Of course, CD4 is actual a dead format, but it would nevertheless wellcome for owner of CD-4 records to lift CD-4 with new technology in our actual time with better results as before.

    By the way. I think, we need not all the specialities, which Lou have shown by his developments. For most CD-4 Fans is interesting an input for MM and additional MC pick ups - and 4 output lines of the demodulated signal with most possible channel separation.

    If you need the schemaitcs, you may inform me.

    Sincerly

    Dietrich
    I self would like to get one new demodulator by a price of $ 500 till 800. Because I have collected the names of 10 from our CD-4 fans, who was interested for the Dorren Demodulator, I will inform them, that they may now again make an order or announce threir interess for a new Demodulkator by costs of $ 500.

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  27. #23
    600 Club - QQ All Star sukothai's Avatar
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    Default Re: Involve CD4....Is there any life in it????

    Here's a direct link to Lou's latest schematic.
    Attached Files Attached Files

  28. #24
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    Default Re: Involve CD4....Is there any life in it????

    I'm in for the $500 demodulator!

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    Default Re: Involve CD4....Is there any life in it????

    I am in for 1, maybe 2. Also I would interested in just the PWB assembly so I could replace (or add) it too my receivers and/or current de-modulators that I like the looks of but do not perform.

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