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  1. S

    DC Power Supply Noise?

    Auto electronics has vastly improved over the years. The power line filter Harald talks about used to be readily available from a lot of places because so many older vehicles needed it to help filter out alternator noise. I don't see very many of them these days, but I'm a big believer is...
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    is electronics a dying hobby?

    I'm an old guy. When I was younger we generally had to build our own circuits for specific applications that we wanted. There were parts stores all over the neighborhood. Those stores have died-off, and most people that want parts now have to mail-order them. I've said many times on this site...
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    hand crank telephone ( 5 bar stromberg-carlson)

    I got one just to play around with the magneto. One word of advice. Keep your hands to yourself when you get it going. It'll give you one heck of a wake-up jolt if you put your fingers in the wrong place.
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    am I mean????

    Not mean, just insensitive. In the old days if one guy complained, everyone thought he was a crackpot. Today, if one person complains, everyone else is insensitive to that person's needs. And if anybody disagrees with me, consider yourself insensitive to my needs.
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    Fisher Studio Standard CA-880 Amplfier

    No telling what caused the main power fuse to blow (apparently it's internal), but you can bet your bottom dollar your amp has one. It may be a simple fix. Take the cover off the unit (Make sure you unplug it from wall power first), and look for the internal fuse. While you're looking around in...
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    In Memoriam

    I just wanted to say that there aren't too many times I log onto this site that I don't think about our loss of KrisBlueNZ. I've seen plenty of posts from new members who say they were directed to Electronics Point because of Google searches. If Ian doesn't know it, his site here is THE go-to...
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    Multimeter

    After checking Martaine2005's advice, if you have any troubleshooting skills open the case up and look for burned components. A lot of DVM's I've worked on have a resistor at the V input jack to limit high voltage current for readings. That resistor is prone to burn-up at overvoltage.
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    Remove noise from TDA amplifier

    Somebody here might find something you can do to your circuit electrically, but here's something you can try in the meantime: Shield your circuit and input leads from outside electrical interference noise. You may just be picking-up RFI from outside sources (you're not working under a...
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    TCXO or oven heated oscillator? Which one and why.

    Instrument? Application? What exactly do you mean by use 'out in the cold'? Are we talking about something generically, or an application/accuracy issue?
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    Old Electronic components

    I can't help but submit that germanium devices are used (along with other new substrates) in 'hardened' military & satellite electronics designed to withstand electro mechanical pulse and solar events. There is a place for both silicon and germanium in electronics. Each has advantages over the...
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    Technics CH990E CD Player does not open

    Just a thought here. When I really want to repair something like this, I look for a scrap or cheap equivalent model and make one good one out of the two bad ones. eBay or somewhere like that where you might find what you need.
  12. S

    TCXO or oven heated oscillator? Which one and why.

    What type of instrument? Quality gear has integral internal support for itself. Is this something made for some particular outdoor application? I'm most familiar with test and measurement instrumentation. If the instrument requires temperature compensation it has it whether used on the bench or...
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    Old Electronic components

    Another annoying thing to consider is that a lot of the early germanium transistors came unmarked. At the time I think the manufacturers just assumed there were only going to be a few devices made of so few available transistors. They turned them out, packaged them together with the part number...
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    National BIG POWER Karaoke system by Panasonic

    I'm not in Tennessee so I don't know who to recommend. Can you contact the manufacturer and see if they can recommend an authorized repair shop? Probably most any TV/Radio repair shop can take a look at it, but they'd charge you for looking for a schematic for the unit, and an authorized repair...
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    A hard to resist problem

    I tend to agree with the idea that the resistors in question are 1/4W I would like to share some other trivia concerning this: I was receiving a specific size surface mount resistor, when suddenly I started receiving a smaller device with the same part number. I contacted the manufacturer, and...
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    new WAGO 221 spring loaded terminals a disaster

    I've got the same problem with small C&K Switch slide switches. We've used the same C&K slide switches made in the U.S. for 20 years. The recent replacement ('EXACT' replacement) from C&K are now made in China and are disturbingly unreliable. A lot of the Chinese stuff is getting better, but...
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    pulse

    Brother, I think you just defined alternating current. Using it to do work is what this electronics thing is all about.
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    Gotta love chinese sites

    What's wrong with yous guys. Chinese read from the bottom up.
  19. S

    Purpose in syncronizing electronic signals

    stuart smith where are you?
  20. S

    Headphones repair

    Me and the rest of us here have seen this problem repeatedly, and have offered advice about what to do about it. It's a difficult repair and there have been a lot of good directions given on this site for anyone who wants to attempt repairs. I don't want to rehash what's already been posted. I...
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