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Velleman Kits

Discussion in 'Electronic Basics' started by phaeton, May 22, 2007.

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  1. phaeton

    phaeton Guest

    Say,

    Anyone ever assemble the Velleman Kits from Jameco? Namely stuff like
    radio transmitters and receivers:

    http://www.jameco.com/webapp/wcs/st...toreId=10001&catalogId=10001&productId=117604

    http://www.jameco.com/webapp/wcs/st...toreId=10001&catalogId=10001&productId=211772


    While it seems that assembling each kit will provide a working (and
    useful) device, I don't know that it will really *teach* anything.
    Each link above also has a link for the manual, but after looking at
    the pdf, it seems like it's just a matter of "solder this, then solder
    this, then solder this, and you have a device. If it doesn't work,
    then try these couple of things, but after that, you're on your own.".


    Might be up to the ARRL manual to learn about radio stuff, eh?
     
  2. Lord Garth

    Lord Garth Guest

    It's really up the assembler to go beyond the kit. If the desire to
    experiment is there, the kit provides the play ground.

    You lean to imagine what could be if you change this or that, none of
    which is in the kit manual.
     
  3. I'm not sure but the one vellman product I have tried(an oscope) is crap.
    (although I guess you get what you pay for)
     
  4. Jasen

    Jasen Guest

    You learn to solder, (and to inspect your work if the kit doesn't)
    two essential skills before you start designing your own stuff.


    Bye.
    Jasen
     
  5. phaeton

    phaeton Guest

    (learningness aside)

    Well, FWIW... Using the pdf manual/schematic, I built the Super
    Snooper Big Ear some time ago. I didn't order the kit, but I had all
    the parts available so I built one exactly to their specs. Mine
    worked, but not exactly as they advertised theirs to. I have a set of
    sound-insulated headphones that I plugged into it, and the sound level
    was about the same as what my naked ears would pick up, sans any bass
    frequencies (that's a condensor mic for ya). I tried tubes, parabolic
    reflector/collectors, all that. Went over the schem a couple of times
    and it's same as what they've got.

    Even when first looking at the schematic I thought it was kind of a
    goofy set up. I socketed the ICs so I was able to switch out the
    LM1458 they were using as the 'preamp' for some less noisy dual op amp
    choices. The NE5532 and JRC4558 seem best. Maybe the 1458 is more
    available in Europe?

    They also could have gotten so much more out of the 386. I guess
    they were trying to err on the side of caution and not destroy
    anyone's hearing.

    (learningness returns to forefront)


    Are there, or were there, other kits (of various projects) in the
    olden days that would come with a somewhat informative manual? I
    realize radio is a pretty comprehensive subject, but even a quick
    overview would give you an idea of what to go looking up at the
    library (Forrest Mimms books were good for that). It doesn't seem
    like this kit gives you anything.

    Btw, I'm not whining or complaining. Just discussing :)

    Google Is My Friend.
     
  6. AJ

    AJ Guest

    I kind of agree, I have purchased heaps of kits in my younger years that
    have mentioned every part of the circuit and what it is doing but doesn't
    break it down enough to have a full understanding of how it actually works.

    Regards


    AJ
     
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