Where to download FREE manuals for newer electronics?

Started by Anonymous in sci.electronics.basics5 months ago 10 replies

Most of the manuals for the very old electronics, especially tube gear, can be gotten online for free. But I am looking for a manual for a...

Most of the manuals for the very old electronics, especially tube gear, can be gotten online for free. But I am looking for a manual for a newer piece of equipment. All I am finding are bogus websites that try to get me to download something else, or sites that want payment for a PDF file download. I did find one site that actually had the manual, but it was written in a foreign language ...


Solar storm could strike Earth Thursday: What you need to know

Started by Mr. Man-wai Chang in sci.electronics.basics5 months ago 2 replies

Solar storm could strike Earth Thursday: What you need to know Full story: A solar storm is forecast to hit Earth early Thursday after...

Solar storm could strike Earth Thursday: What you need to know Full story: A solar storm is forecast to hit Earth early Thursday after the Sun unleashed a powerful solar flare ? a burst of high-energy radiation ? Sunday night. NASA?s Solar Dynamics Observatory Satellite cap


The special data device SpaceX's Falcon Heavy sent to orbit is just the start

Started by Mr. Man-wai Chang in sci.electronics.basics5 months ago

The special data device SpaceX's Falcon Heavy sent to orbit is just the start Full story: On board the Tesla Roadster that Elon Musk...

The special data device SpaceX's Falcon Heavy sent to orbit is just the start Full story: On board the Tesla Roadster that Elon Musk sent hurtling towards the sun, aiming for a long, leisurely Earth-Mars orbit, there were a few pieces of miscellaneous cargo. A so-called


How do I dial these phones

Started by Blondie in sci.electronics.basics5 months ago

I hope this is the right place to ask this. My mom gave me head phones for Christmas. They dont look like any other phones and dont have...

I hope this is the right place to ask this. My mom gave me head phones for Christmas. They dont look like any other phones and dont have a screen or dialing buttons. I want to make a call, but how do I dial on these phones. Another thing, the plug on them wont stay plugged in the phone wire thing on the wall.


Removing battery corrosion

Started by Anonymous in sci.electronics.basics5 months ago 19 replies

I got an old AM-FM pocket transistor radio which looked good and clean till I opened the battery compartment. Very corroded carbon...

I got an old AM-FM pocket transistor radio which looked good and clean till I opened the battery compartment. Very corroded carbon zinc batteries were in it. After removing them, I cleaned off as much of the corrosion as possible by scraping with a plastic stick, and scrubbing with q-tips and rubbing alcohol. That got rid of most of it, and I was surprised to find the battery clips are not ba...


China Capacitors are Radioactive

Started by Decoder in sci.electronics.basics5 months ago 29 replies

China is intentionally trying to kill Americans with radiation. This radiation is the number one cause of cancer and other diseases. China is...

China is intentionally trying to kill Americans with radiation. This radiation is the number one cause of cancer and other diseases. China is adding radioactive material to all capacitors that are being shipped to the USA. This substance is harmful to be around at all times, but it becomes much worse when electricity is applied to these capacitors. Besides the threat of cancer, radiation redu...


Will Deoxit on a circuit board cause problems?

Started by Anonymous in sci.electronics.basics5 months ago 3 replies

Will Deoxit on a circuit board cause problems? In other words, is it conductive if it's touching components? I had to spray some switches...

Will Deoxit on a circuit board cause problems? In other words, is it conductive if it's touching components? I had to spray some switches that had a very tiny hole in a plastic covering, so the Deoxit got all over the board. I removed most of it with tissue paper, but there are traces of it beneath chips and other components, which is difficult to remove. I have also used some Q-tips to g...


driving a 1000 mW laser diode

Started by Ingmar Webb in sci.electronics.basics5 months ago 1 reply

I want to power a laser diode (the kind used for engraving) in a portable device for short periods with a 9V battery. The laser diode comes in a...

I want to power a laser diode (the kind used for engraving) in a portable device for short periods with a 9V battery. The laser diode comes in a tube with a focusing lens and trailing wires, and the spec says 5V 1A. This diagram seems to be the standard circuit for driving these. The LM317 spec says Vout is 1.25V above Va and it needs 3V of headroom. ---------- +9V----o-----...


Solder paste

Started by Andy K in sci.electronics.basics5 months ago 18 replies

I having been using Oatey solder paste when soldering large diameter wires. I know it's designed for copper pipes. Is there something...

I having been using Oatey solder paste when soldering large diameter wires. I know it's designed for copper pipes. Is there something better? Thanks, Andy


True RMS multimeter?

Started by Andy in sci.electronics.basics6 months ago 21 replies

I bought an Excel XL 830L multimeter with the understanding that it was a RMS voltmeter. I also have UEI ElectroMate DM 200. When I checked...

I bought an Excel XL 830L multimeter with the understanding that it was a RMS voltmeter. I also have UEI ElectroMate DM 200. When I checked the output of my APC unit with both meters, the readings were about the same. Is there a way to tell if a meter is an RMS type? Thanks, Andy


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