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  1. S

    1989 Zenith Television upgraded to 2011

    What do you want to do with it? It'll play systems made for the old analog TV signal, (which went digital a while back), VCR's, DVD's, Playstation, as it is. Cable and most satellite connections are also compatible. If you want over the airwaves, old-style local TV stations, you need the...
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    Charging circuit parameters:

    Don't even think about connecting the transformer directly to the batteries you're trying to recharge. Google NiCad recharging circuits, and find one that meets your needs. You need a circuit that limits the trickle-current to the batteries, and stops the re- charging when you get to a...
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    Building on Veroboard

    What matrix board? And it's considerably easier to change wire locations with wire wrap when/if you need to modify your circuit. I'm assuming if you're building on a vero perf board, you're building an experimental test circuit, before you settle on something you actually WANT to make a...
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    Newbie needs help identifying these chips.

    We're not thinking of using a cell phone to trigger anything unsavory, are we?
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    Building on Veroboard

    As davenn pointed-out, your schematic isn't going to look like your actual component layout. You need to think about the circuit, and place your components for the best wiring configuration for each component. Don't know if you're interested, but have you ever considered 'wire-wrap', to...
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    XLR Connector Ampacity

    Check with the manufacturer, they'll have the rating.
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    Need help finding a solution - switch / Help for a noob - relays

    This is probably an engineering question. I'm a tech. I think in terms of physical connection. I don't understand from the drawing, what it is you're trying to do. If this is theory, some engineer can probably figure-out what the drawing means. But for us hands-on guys, we'd need a...
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    very shocking ceiling fan install

    I've seen that happen when a do-it-yourselfer does part of the installation. Usually happens when somebody ties the ceiling fan power into some other device on the same leg. A second ceiling fan, another light or socket in the room, or multiple on-off switches for entry and exit from two...
  9. S

    Need to identify unknown component

    It's not 'a' component, it's a microcircuit for the dimmer. Probably not too complex, just something the manufacturer had made in quantity, to work their circuit.
  10. S

    Need help identifying wire

    If it's thermocouple wire, look it up for applications. You've got more than you sound like you'll ever need. Save some to play with if you want, and you'll get good money for selling the rest of the roll. Thermocouple wire is used extensively in zillions of industrial applications.
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    Strange electrical noise - help?

    1)Find-out what new equipment was INSTALLED in your area when this started. It's possible the new instrument is not well-isolated electrically, and is inducing the signal into your EEG. When you've narrowed the list of probables, DISCONNECT power to the suspect instrument, and run the EEG...
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    Identifying a couple of components

    I've seen what you've seen (like a missing leading zero) when the same device is made by two different manufacturers. Which is exactly what we're talking about here (Harris and Fairchild making the same device). The manufacturers have their own annoying identifiers in the part numbers, to ID...
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    Identifying a couple of components

    No answers, but some trivia. What I read is that both Harris and Fairchild made the 12N6LE. The RFD12N06RLE is made by Fairchild. I don't know why they would give the same part, two different markings (unless some type of minor difference). So I would THINK they're not the same part. On...
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    Unmarked component

    The -35V you read is the UNREGULATED voltage that comes from your supply. It is the reason why you HAVE the voltage regulator to give you the voltage you need. (-24VDC). The four diodes are there in a 'bridge' configuration. They take the AC voltage from your power supply, and convert it to...
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    Guidance for PS

    Everybody's got to make a living, they just don't have to make it off of you. Good luck getting what you need, at a price you want to pay.
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    electronic drummer / transformer wiring / capacitor rating

    I don't know where you're at, but you've got a computer. My suggestion is to find a couple catalog places that stock electronic parts, that can ship inexpensively to your house. You can usually get the parts you want in a few days, and with the catalogs on-hand, you'll be ready the next time...
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    Unmarked component

    If possible, you want to see if you have the markings on the TO-220 Pkg in the working chair. If not, you can use a volt meter, to read the pins of the device that is NOT damaged, (Download the data sheet on-line, if you're pretty sure you've got a 7824 (positive 24V regulator), or 7924...
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    Guidance for PS

    How much are you paying for Google searches?
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    Voltage drop on a long power cord

    What's happening, is that you're trimmer at 150', is trying to draw extra current, through the extension cords. Feel the cord, and you'll be able to feel the heat in the wires. You could reduce the problem by using larger AWG wire (12 or 10 gauge), but that'd run you some money. Besides...
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    Guidance for PS

    Well, Googling told me you're referring to IEC testing & measurement. REO in the UK works to those specs (as well as a lot of other sites you can check) Just Google them, and you should be able to find what you need (and you'll find lots of links to check).
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