Recent content by RFamateur

  1. RFamateur

    Looking for Simulation software!

    Hey, I was wondering if it was possible to get a lesser version of multisim that isn't so expensive.  I have just used up my 30 day trial and I have to say I'm hooked-- this program is by far the best I've used.  Anyway it would seem NI sells the basic version for 1.5k; a bit higher than I want...
  2. RFamateur

    Input and Output impedance

    Impedance is essentially an elements resistance to AC power. In the case of transistors, when you have a low input impedance and a high output impedance it is usually evidence of a voltage amplifier, or common-emitter configuration.  On the other hand high input and low output impedance tends to...
  3. RFamateur

    Power supply Enclosures

    Hey so I'm trying to optimize my power supply design for cost.  The circuit design to me isn't a problem but my familiarity with fabricating front panels and mounting various components to an aluminum chassis at a low price is a problem!  I looked at the website suggested earlier for...
  4. RFamateur

    Want a 4400uF 50WVDC Capacitor

    Thanks guys that was most helpful. On a side note I have been fabricating an old CD player as the case for the power supply, but it's turning out to be more difficult than I originally thought.  Any suggestions on relatively cheap project boxes and the best tools to use for mounting switches...
  5. RFamateur

    Want a 4400uF 50WVDC Capacitor

    Hey, so I'm building a dual polarity power supply and I'm having the hardest time finding the capacitor rating I'm looking for.  I was under the impression this capacitor was fairly common but after digging around it seems to be really hard to find.  I have found 4700uF electrolytic capacitors...
  6. RFamateur

    Electronic suplus stores

    Hi, I've just recently started circuit design as a hobby and I'm looking for recommendations on electronic surplus stores.  Right now I'm interested in building power supplies and amplifiers, but I like to experiment with a variety of systems including transmitters and converters.  Anyway I'm...
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