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  1. tedstruk

    12v automotive relay how do you find amp rating ?

    yes, the wrong amperage can burn up a relay, but the question here is..... If you know it is a 12v automotive relay, then why would you need to know the amperage? say the real good alternator puts out about 30 amps, but the circuitry in the auto doesn't allow it to get to the relay. Then your...
  2. tedstruk

    First alert security camera power source

    yep. too vaige again.... See I have been testing these wall warts, and most of them are so far off their mark (or at least the marks on them) that I am seriously wondering if the old saying "you can lead a horse to water, but you can't make him drink...." isn't getting some new use. When I...
  3. tedstruk

    How do I make my own musical instrument?

    electronic instruments use a myriad of controls, but they all have the same problem... everytime you throw a switch, or move a knob--it creates a blot of noise... I just posted a clarification on S:N in General Thread signal to noise ratio... The e-point is... the highest signal is a...
  4. tedstruk

    Clarification of terms S:N

    I remember reading somewhere that the main point of a circuit is having a good signal to noise ratio. hence S:N So when I am hooking up my guitar pots, I am thinking "too much noise" and trying to clean the fender out of the gibson. Anyway, As I remember the term S:N is counter productive in...
  5. tedstruk

    Help with Voltage Regulation

    I was just reading about voltage dividers, it looks like when you build a voltage divider, that each time you add a resistor, the voltage drops a bit, and each resistor allows an output of a different voltage. I don't know if they make voltage dividers that small... (2v is considered signal...
  6. tedstruk

    First alert security camera power source

    I bought a set of 2.4g security cameras for my shop, and they advertised "wireless". They have to be plugged into 100v us for them to work and the wire from the wall wart is a bit shor....t not wireless at all. So I spliced in the amount of wire I needed to reach the plug and the cameras...
  7. tedstruk

    Frequing resonance at audio taper

    I built a 5mhz freq circuit, to install as a tone control in my guitar. I want to know if the 5 mhz isenough to effect the 20-60mhz audio taper or not? How does this work? Does the 5mhz just inc or dec the existing, or is it an add to the top, or drop off the bottom or what? I would think that...
  8. tedstruk

    What should I get for beginning electronics?

    A pair of linemans pliers. A pair or insulated rubber gloves, and a short small wooden stick. you might want an assortment of wooden sticks of different lengths and thicknesses... or plastic sticks...
  9. tedstruk

    Stereo audio mixer build

    In my experience(of which is very very small) the balance system must be balanced to something... can't be balance to ground. ie. you can balance a midrange to a bass and a treble, or any combination there of, but you can't balance a high end to a low end without a midrange. on my latest...
  10. tedstruk

    Value of old tube amps

    Well here I go again. I got a pair of those old consoles and I didn't know what to do with them. So one of them was working fine and the other only a part of it worked. I stripped the bad one down to its guts and repaired a couple of tower speakers that had blown speakers---and I felt like a...
  11. tedstruk

    Common Mode Noise Filter Question

    Its my belief that the signal to noise ratio probably won't change with induced current. But it's probably be best to use individual coils rather than tapped or double coils. I think that one coil induces a frequency and the other probably induces another. wouldn't really matter how they were...
  12. tedstruk

    How do i know how many volts my circuit needs?

    Ok, I think I found the end of my basic electronics course... Active components are - sub a. the ones on the sceen that you click on and are loaded from the client(ha ha ha!) ie.VB5 OR?! 1. The components that don't require power 2. The ones that are powered 3. controls that require manual...
  13. tedstruk

    How do i know how many volts my circuit needs?

    My guitar electronics didn't put out anything... dead. I think its because the baxandall circuit requires alot of power.
  14. tedstruk

    Old Style Op Amp

    My little OP amp isn't all there... I can't remember where the resistor went, or what the formula was for getting the value...
  15. tedstruk

    Old Style Op Amp

    back in the days of pc boards and splices... When the circuit required an operational amplifier, you stuck a transistor in parallel with the base and collector and that was it. so I am buttoning up my new monster guitar. I don't know how I got it all on that one little chip... Or how I am...
  16. tedstruk

    Jazzmaster style bullet strat guitar cavity

    phase switching, series-parallel or what ever is really becoming a pain in the cavity--- imagine my present dilemna of 2-6 contact ON-ON switches 1-5 way switch with 7 contacts(most have 8 contacts) a master volume of 3 contacts, a master tone of 3 contacts, and 3-2 coil pickups with 5 wires...
  17. tedstruk

    Coil direction deduction

    Suppose I wanted to know what direction a coil of wire is wrapped(just trying to follow the code of electronics) what would be a good way to find out whether they were wrapped right? Is there a way? What would the product be if I connected them wrong? Why am I sitting here wondering all this...
  18. tedstruk

    why my phone posts don't post..

    My phone post didn't post. I logged in WI-Fi, with chrome google and signed in, then posted a pic I took and followed all the directions... I think the server screwed up! this forum needs an app. for androids thanks guys! I love it here!
  19. tedstruk

    How can I test a xlr charging port

    So your breezy died. sad day in Israel. Heres my take on this. those desert monkeys are trying to charge 24v lead acid batterys with 5A. the only time I know of that you use 5-6 amps to charge a battery is the first 3 minutes on a brand new dead battery with new acid in it. All the rest of...
  20. tedstruk

    Tone for thought..

    just for thought.... I have discovered why my signal is square... tscope only puts out a square wave.... so getting a sine wave out of it will require a special circuit??? Are there any genius' in here who built one of these to go on the calibration terminal so they didn't have to buy a function...
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