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  1. S

    IC socket orientation - I made a boo boo!

    BobK is right, the circuit will work fine. alfa88 has a point about somehow identifying the correct orientation of the socket. EVERYTHING I do is geared for the NEXT time I or somebody else has to get back in there and repair the circuit again. You may never need to work on this circuit...
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    Oven heater element.

    If it's a household stove, take the element into any appliance repair supply store, and they'll match it up for you. You can write down the make and model of your oven in case they need it. But the stores near me can just look at it and know what it is. 95% of the time, it's the heating...
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    unidentified electromagnetic shaker

    I don't recognize it. Did it come off a larger assembly, that you might be able to get a manufactuer's ID from? It's probably pointless to disassemble it to try to ID it, there's rarely any informaion inside the housings on a small assembly like that. You may have to just start contacting...
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    Shunt covers?

    I use heavy plastic stand-offs, bolted with the case fastening screws (you need longer ones), and a piece of plexiglass over the shunt. I don't know of anyone who makes commercial ones, unless the company that makes the shunt offers one. (Did you ask them?) You may get better ideas, but...
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    equivalent fet for 2n3818

    I don't know what's available in N.Z. Here in the States we've got a pretty extensive equivalent mfgr 'NTE', They were competing with Sylvania's 'ECG' line, but undercutting the ECG prices. Eventually Sylvania gave-up competing against them, and sold-out to NTE. NTE16002 is the equivalent...
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    what every good moderator needs ;)

    *steve* IS the nut stopper. I've just never seen the portrait of him before.
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    Identifying thermal insulation on a FET

    That looks like a pretty heavy-duty copper buss bar they're mounted on. The mark on the copper between the devices and the board makes me think the PCB also had some type of cover over it. I can't think of a thermal reason for the covers, so my bet is that the shields are just to keep the...
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    PCB holders for under the microscope

    Sounds to me like your microscope is the problem. How the heck is your employer expecting you to work on a PCB under those conditions? If you can't get a model made for what you're doing, can't you get a platform attached to elevate the magnifier, or somehow widen the distance between the...
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    HP6125 DC power supply

    My friend, anything made by HP is high-end, even if it's 30 years old. Did you check the output terminals to see if they have the current sense terminals? Up until they got revamped as Agilent, HP was the Rolls Royce of test and measurement equipment.
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    HP6125 DC power supply

    I'm not familiar with the 6125, but I'm thinking about this so I thought I'd mention it. A lot of high-end power supplies have a voltage out, WITH current sense outputs. If you try to read voltage without considering the current sense outputs, you read no output. You might check to see if...
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    Identify an MOV

    The company name is really actually spelled: L I T T E L F U S E (not littlefuse). I just did a quick check of their website. They have a series of MOV's with the 'V275Lxxxx" prefix. If you check the site and look for thier package marking configurations, you might find your voltage and...
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    Identify an MOV

    The 'LF' looks like the 'Littelfuse' company logo. Maybe find some data on "Littelfuse' devices, and see if it's listed in their product line.
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    Magnifier Glasses and Lamps , I can't see or solder fine pitch from my desk why?

    When I got old, and couldn't see the small stuff anymore, I got me an 'OptiVISOR'. It's worn on your head, the lenses flip up when not in use, and down when you need them. There are a wide variety of interchangeable lenses to choose from, and an attachable loupe if you need it. It goes where...
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    Part Number Help - MO305512

    How old is this thing? I found a reference to a Fairchild Device, (That is no longer listed on their website), and a reference for a '3.3V/2.5V/1.8V In-System Programmable Super-FAST High Density PLD.' My guess would be it's a Fairchild TO-220, but like you, I couldn't easily find any data...
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    Voltage measurement with differential amplifier

    One Ohm is a very low resistance to read accurately. My input would be that the tolerances of your resistors is critical. The accuracy of your meter is critical. Yageo/Phycomp and Susumu make resistors in the .5% tolerance accuracy range. Your meter must be calibrated, and is hopefully in...
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    looking for help/info on fixed low voltage-high current generator or electronics!!

    You're not going to get anything more compact, more capable, or less complex than a car battery for your tests.
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    What is with these kids today?

    It's not just happening here of course. Those kids are getting jobs in places that supply us with the electronic components we need. It used to be I contacted a manufacturer or a vendor, and I'd get a reply. With the kids running the keyboards now, instead of answering the phone or a...
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    Coil winding resistance.

    The magnets rotate inside the coil field, they don't mechancially touch one another. What mechanically DOES touch the assembly, are the bearings at the ends of the shaft, which suspend the shaft with the magnets on it, inside the coils. So your mechanical resistance, are the bearings holding...
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    technics amp

    I'm not familiar with the model described here, and like davenn said, it matters what fuse you're talking about (power or speaker fuses). My comment is I've run across a couple of amplifiers over the years that will blow fuses if you turn them on without any load. Check your owners manual...
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    Help removing a wiring harness. Please.

    Most of the chemicals I've used to soften glue (like acetone), also soften the plastics on connectors. Only the people who built the board know what glue they used on the connectors (and what dissolves it without melting plastic). Any possibility of using a heatgun (like for shrink-tube...
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