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  1. S

    i would like to see alternate part numbers for #2N3906, transistor for a cannon word processor

    Like BobK says, the 2N3906 is the cheapest transistor you're going to find. That's not a Cannon part number, that's the generic JEDEC, or industry standard part number for that transistor. You can find it just about anywhere without cross-referencing it to anything else.
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    Rest in Peace, Kris

    Sincere condolences on your family's loss. His passing affects many people here also, who communicated with him seeking his advice.(And his wit) Please know that KrisBlueNZ touched many lives here as well as the ones there. And we miss him greatly.
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    Heat issues with car head unit

    NO, your heater wouldn't melt the solder. You DO have a heat issue, but it may be related to the age of the electronics, and the component's ability to operate in high heat. The first thing I'd do is examine the board, blow out any dust or dirt that may be trapping heat on the components on the...
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    Car Window Auto Drop & Raise

    Before you proceed, are you sure the mechanical window up-down mechanism is not worn? This may not have anything to do with your issue, but I've found in my experience that plastic rollers and washers wear, and affect window sealing.
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    Blown 2n3055 transistors

    My guess would be that the fans starting-up might be drawing an initial current surge. I don't know the value of your cap in the circuit. (I suppose it's possible tht the cap would be fully charged during your second start-up, and you might not see the initial start-up power drop the second...
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    Technics SA-DX1050 A/V Receiver audio on and off intermitent

    The first and most obvious thing to check is the on-off switch itself.(It could be bad) Do you have any experience troubleshooting electronic equipment?
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    2230 Tektronix Scope handle removal

    When you slide the scope out of the chassis housing, look for a loose or burned connection. First thing that comes to mind for disappearing trace when you tilt the scope. Good luck.
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    Blown 2n3055 transistors

    Old-timer peripheral input here. (For whatever it's woth) Back in the 1970's the 2N3055 was a pretty robust transistor. I work on a lot of 1970's era gear. When replacing 2N3055's in the old gear, I noticed they often didn't last very long. I talked to engineers at one of the semiconductor...
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    2230 Tektronix Scope handle removal

    Nuts, I gave you a bum scoop on the handle removal for the 2230. I talked to the guy at my work that repairs Tekt scopes. There is a single screw holding each side of the handle that is accessed from the inside. Remove the bolts for the chasis housing on the rear of the housing, slide the entire...
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    Cool Project Idea

    All of the visually appealing artsy stuff I've seen, involve LEDs. I think the cube is a great idea. I'd Google LED Projects, and see what else is out there that you might be interested in for decoration in your technical room. The scrolling message LED display is something that you can change...
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    Light Bulbs in the house keep Burning Out

    It really sounds like your electric power into your home is poorly regulated, with higher than expected voltage at least intermittently, than the bulbs can handle.
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    For Sale: 45 year collection of parts for sale

    haveans1944's suggestion is a good one. Google Amateur (Ham) Radio 'Hamfests' in your area. Clubs typeically hold 'Hamfest' swap meets, where guys (and girls) can go to buy and sell their surplus parts and equipment. Ham Radio clubs in my area have these "hamfests' twice a year.
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    Yamaha RX-V496RDS problem

    What I would do, is run a continuity check of the semidconductors, and look for an open in one of them. The fuse not blowing any more tells me you found the shorted devices, now it' a matter of finding the ones that burned 'open' circuit. Good luck. If you can trace the power path beyond the...
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    2230 Tektronix Scope handle removal

    Yeah, my Tekt scopes have a cover you have to pry off, over the holding screws.
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    Ideas for a school experiment?

    Isn't there something more specific you'd LIKE to try? Something you're curious about that we can offer insight into?
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    treadmill display is blinking

    Is it battey powered? Does the battery need to be changed?
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    Akai AA-1150 problem

    We can use all the insight we can get. Some of us like to think we know everything sometimes, but occasionally we get a question that stumps us. We can use some of those years of experience here. You'll probably find if you check here once in a while, that you know something we can only...
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    Akai AA-1150 problem

    Glad you found the problem. If we'd known you were using an independent speaker selection box, that probably would have been high on the 'things to check first' list. The symptom seemed unusual for a reciever/amplifier internal issue. I know it took a lot of work and frustration to isolate the...
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    Parts recommendation needed

    I may be completely out of line with this, but here goes: Is this ultrasonic generaor module made for use in the U.S. or U.K.? Might the 50 Hz vs. 60 Hz difference come into play here? Just a thought I had while veiwing these posts. I'm a little confused about what exists,and what might be...
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    soldering questions

    They've been phasing-out lead in solder here in the States for environmental concerns. I think the explanations above account for your problems. You want to avoid acid-core solder used for pipe soldering, if that's what you accidentally got for your electrical applications. And yes, a plated tip...
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