tech world forum (more than music)

Discussion in 'DIY Pro Audio Forum' started by bigtree, Jan 14, 2002.

  1. bigtree

    bigtree musician, mixer, music producer Has Studio Services

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    I created this forum in hope that we would get a paticular person to moderate it; they were unfortuneatley out of our range for now, so maybe we should merge this forum and turn this one into a tech world forum! It would be cool to get folks here that are into all sorts of cool things. I love hearing about new designs, software, toys etc. I'm sure there are a ton of forums/sites out there but I would like to see what we can come up with. Any ideas or mods out there?
  2. Kev

    Kev Guest

    Don't give up yet!!

    I did send an email to one of the other moderaters and asked about it.

    What qualifications etc. I'm on slooow net but willing to co-moderate something here or somewhere else on the tech side for home-recording and musicians etc.

    Taking on a tech question on the latest SSL etc, could be difficult as I don't access to an SSL, if you get my drift.

    As I said there must be some interest out there and I live in hope that the DIY can get better organised. DIY for the Home or Pro-studio is worth the effort.
  3. Bear's Gone Fission

    Bear's Gone Fission

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    I wish there was more stuff going on in this forum. I'd love to pickup anything possible on electronics (theory, design, mods, troubleshooting), acoustics and room treatment, maintenance, hell, just about anything.

    Maybe a shared project would get some activity going here. I'm thinking about building the Jensen cascode tube preamp outlined in their schematics, but I think the project might get some reworking. (I'll get into specifics if anyone's interested.) Anyone else into researching and planning a project cooperatively like that? Heck, we could even start basic, like doing a layout and step by step instructions to the deluxe direct box from the same set of links.

    You figure if we do enough of this sort of thing with various aspects of the studio (including not just electronics, but even acoustics helpers like bass traps and diffusors), you'd have a resource for DIY'ers and a community already in the mindset to tackle new goals, and quite a bit more active than the current state, where we're just responsive to the odd question.

    Whaddya think?

    Bear
  4. Kev

    Kev Guest

    Bear I'm right with you ...

    I haven't mastered the Jensen pre yet but have been working on it for some time.

    I know you all what Tube things but even though it is easy on paper there are a number of things that can upset the project.

    I think there are some better first projects to get the confidence going and then do a Tube project. I think an LA2A is a better start than a Mic pre as the expectations for a Mic pre can be too high unless you go for an excellent design and excellent components.

    I have many links to all sorts of projects both electronic and Acoustic. Where do you want to start?

    If you can purchase an SSM2017 , SSM 2142 and a n LM833 I have a great simple Mic pre that is very neutral but is still my frontline Mic pre even against a Joemeek VC1Qcs ....

    I have a simplified LA4 again you will need some SSM chips ... 2142 and 2143...

    I am working on an 1176 but I'm not happy with the PCB layout.

    As for the LA2A Tube project goes, check out:

    http://home.earthlink.net/~djahnsen/index.htm

    This is a very good book and explains everything
  5. bigtree

    bigtree musician, mixer, music producer Has Studio Services

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    Cool you guys, I'm impressed and quite supprised to see interest so quickly. Why don't you both moderate this puppy. We have room for two more if you both go for it. Maybe a few more will come forward and this forum will really be inovative.

    let me know

    Chris :D
  6. Kev

    Kev Guest

    <blockquote>quote:<hr>Originally posted by bigtree:

    Cool you guys...
    We have room for two more if you both go for it.
    let me know

    Chris :D


    Fine by me...

    Chris you are welcome to email me direct.
    In fact anyone interested in making something for there studio or PA is welcome to email me.
    Last edited by a moderator: Mar 28, 2014
  7. nodell

    nodell Guest

    hey guys,

    i'd be interested in working on a simple project. i don't have any experience in building gear (aside from an occasional mic/instrument cable). is there a project that's suitable for a beginner or would most things be too involved at this point? (i'm a computer guy not an electrical engineer).

    - neil
  8. Bear's Gone Fission

    Bear's Gone Fission

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    Glad you're game, Neil. I'm actually thinking we should start basic and simple, building useful stuff we need. The other tricky element is picking stuff that we aren't better off just buying comercial gear which would cost the same as the parts.

    So I'm assuming what we're into is somewhere in basic electronics, and not carpentry (at least I don't have the tools for carpentry, but I can borrow some if that's where we're going). What pieces do we need? What could we use another of? I think we can leave guitar amps to these guys for cooperative projects and general discussion. I would think we can hold off on mic preamps and compressors as the investment in parts and the level of knowledge might be a little higher than some interested DIY'ers. I just have a notion we need a soldering project before we get involved in active electronics, so I'd again suggest a good passive direct box. Or are we ready to jump into Kev's preamp, which sounds like a winner? Let's hear it, folks.

    Bear
  9. Kev

    Kev Guest

    <blockquote>quote:<hr>Originally posted by Bear's Gone Fission:

    I just have a notion we need a soldering project before we get involved in active electronics, so I'd again suggest a good passive direct box. Or are we ready to jump into Kev's preamp, which sounds like a winner? Let's hear it, folks.

    Bear



    I have many passive DI and Interconnect boxes. I don't know where to start. Jensen TX's have many schematics on there site and anyone of these is cool and you don't have to use a Jensen as the basic ideas are there and will work with many TX's.

    How about a simple TX DI box with earth lift and a low pass passive filter..... Bass guitar.

    If you want to jump to a Mic-pre or a Comp have a look at,

    http://www.celestial.com.au/~rosswood/diy/dualmicpre/dualmicpre.htm

    Don't be too critical of the site as few knew about it ..... until now. Let me know if you have any problems or suggestions. There are some things nearly ready but you can't see them yet. DualOptoComp, 1176 and Jensen Mic-pre that I'm still not happy with yet.

    The site is slow ...
    sorry I'm not made of money :(
    Last edited by a moderator: Mar 28, 2014
  10. dynamo12

    dynamo12 Guest

    Kev,
    very cool links. I'm actually starting some projects soon. Very basic stuff...i'm looking into PAIA Tubehead to start.
    I like tubes and since i do live sound too i'm looking for something that can work on vocals and that i can carry around without worries. This unit is very versatile and works as preamp and can do as effect/processor as well.
    I like also the small spring reverb ( Graig Anderton )...
    On another note...very often you see these preamps/eq( Calrec/Audix/ Cadac ) and similar that are sold raw. You need to rack them and the appropriate PS. I know voltages for PS probably are different for each unit... i'm just curious if there is any source for this.
    Jo.
  11. Kev

    Kev Guest

    <blockquote>quote:<hr>Originally posted by dynamo12:
    Kev,
    ...i'm looking into PAIA Tubehead to start.
    I like tubes and since i do live sound too i'm looking for something that can work on vocals and that i can carry around without worries.

    I know voltages for PS probably are different for each unit... i'm just curious if there is any source for this.

    Jo.


    Everyone wants Tubes!!

    Not the best place to start and also for PA use you may find the LA4 more useful and robust.

    Power Supliers .... Give me more info on voltages and if it is +15 and -15 see my site.
    Last edited by a moderator: Mar 28, 2014
  12. Bear's Gone Fission

    Bear's Gone Fission

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    Miles ahead, already, Kev. Cool stuff.

    The LPF equipped direct box sounds good, since we can get some basic concepts in like filtering and how transformers work. So it gets down to how simple or full featured does everyone want it to be, and do people want to do a toner-transfer pc board or should we do point-to-point with maybe a terminal strip or two for some parts?

    Bear
  13. nodell

    nodell Guest

    Bear/Kev,

    I don't have a problem starting out real basic - I am certainly not 'good' at soldering. Perhaps the passive DI that you mentioned above (i'm a bassist anyway so that sounded appealing to me) or a re-amp device (or is that starting to get a little too complicated?). I'm game if there's enough interest in putting together a "group" project. Will we have to send in our finished products for a grade?

    - neil
  14. Kev

    Kev Guest

    Bear,

    as there are many people viewing this forum and they will have different skill levels I think the simple approach is better.

    This forum is more that just DIY so I think to refer to a web site may be a way to provide details to projects. The more complex the more you go to the site. I wanted to do things that would be at home even in a 'High Class' studio and this DI box could be. Just because it is simple does not mean junk. I have so many DI's and they were all made to solve a specific problem.

    We probably need some common points of reference so as to describe parts etc. An online Catalog with pictures could be good.

    http://www.altronics.com.au/

    http://www.alliedelec.com/

    .....................

    neil (nodell) ....

    " - I am certainly not 'good' at soldering. "

    We will have to fix that. Soldering well is a skill to be learned and it is a skill that will serve you well.

    A good soldering iron might look something like this,
    http://www.altronics.com.au/cat.asp?cat=5&grp=411&id=T+2443S

    Although I do prefer the Wellers.


    Bear had some links above and I think one will lead you to a how to solder page.

    Also try this,
    http://www.jaycar.com.au/data2.htm

    dynamo12,
    that power supply thing ... do you have a specific thing we can look at or discuss??
  15. dynamo12

    dynamo12 Guest

    &lt;&lt;&lt;dynamo12,
    that power supply thing ... do you have a specific thing we can look at or discuss?? &gt;&gt;&gt;
    Kev and Bear happy that you guys are "keep on tekking " on this forum seems that things are going to be cool around here...
    About PS...i'm not really referring to anything specific for now but since i see very often cards
    ( preamp/eq ) from old consoles ( ref. prior post) that are offered at good prices i was thinking that if you are able to do the same job ("racking" and ps) that some specialized companies offer, very often, at ridicoulus charges, that could be good...assuming the card itself is in decent condition...sorry to be generic..just a thought.
    Jo
    BTW : PAIA Tubehead kit is about $ 110....
  16. Kev

    Kev Guest

    Yes power supplies and racking , it is all possible. Even a power supply and balancing for the RNC in a rack box.... to many ideas.

    Check here for an example of a finished prototype in a rack box.

    http://www.celestial.com.au/~rosswood/diy/dualoptocomp/dualoptocompA.htm

    Bad picture and slow site but you can get the idea.
    All my rack boxs come from the same supplier and so I can get replacement fronts and bottoms etc if I change ideas. In fact I often buy parts to boxes not complete boxes as I have a stock of box bits.
  17. Bear's Gone Fission

    Bear's Gone Fission

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    I have some TELEFUNKEN solid state DI modules on the way. Should be easier than the typical preamp racking where modern features are added. When I get around to them, I'll try to put together a step-by-step of my process to give some ideas.

    Bear
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