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  1. S

    On/Off Speaker POP......but only on one channel

    Can't help feeling like I play like a broken record. Are you possibly not seeing the forest because of the trees? Check the speaker itself if the connections to it are ok. Maybe the previous owner liked his music loud. Is the speaker cone ok, or torn, or holed, or worn, allowing the voice coil...
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    What is this style of pin called?

    I've never seen one before, it probably is a proprietary part (if not somebody here will correct me). I'd try to find a maintenance manual on your calculator, or a schematic with the part number and go from there. I don't know why you need those pins, but if I was desperate, I'd look for a...
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    On/Off Speaker POP......but only on one channel

    Most of the time I encounter this issue, it's the physical contact connection between the amp and the speaker. Just something to look at if you haven't already. A loose connection, crimp, solder joint, something like that. May not be your problem, but the first thing I'd check before...
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    The Dark Side

    This has nothing to do with the expert advice given above. I just want to say that when I started-out many years ago with learning circuits, I found it very important to make sure I was using the correct 'ground' when using a voltmeter. Nothing to do with your circuit here, I just mention it...
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    British Television?

    I was kind of wondering why our unusual President (of the US) gets lambasted by British news agencies so often. If the programming is only what the government allows, and it's all one-sided, that sounds like the reason why. The news media in the US is anti-President Trump 24/7, but not too many...
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    British Television?

    Here in the US, no one taxes TV reception. Our solution apparently has been to restrict programming to nothing that anyone wants to watch. Most of what I see are DVDs of BBC programming.
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    What did Santa bring you?

    My oldest boy said he thought I should have a 9mm, a clip, and some shells. The package contained a 9mm ignition wrench, a paper clip, and 2 small seashells. SOB is getting a lump of coal in his stocking next year.
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    Wanted: Modern and operational citizen's band base station radio

    Paul, I read your other post about trying to get your radio (illegally) modified for 30W output. Why don't you check with one of the amateur (ham) radio clubs in your area. Tell them your problem, and ask them if they can help, or give you any advice on your CB. Most hams are seriously into...
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    Nissan X-trail 2002 - Air conditioner fan occationally won't run

    I don't know if I have enough information, but I'm thinking like Bluejets, the AC system is doing what it's supposed to do. Don't you have a heater option to use for defrost? Or can't you run the fan without engaging the AC? It might help if you tell us the make and model of the car, and if you...
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    Power shutoffs

    The problem I hear about in Arizona, is that utilities and local government offer subsidies to homeowners to install solar panels. To get the subsidy, you conform to the rules attached to the installation: The panels are tied into the local power grid, you don't get the option to run your house...
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    Power shutoffs

    I'm in Arizona, next door to CA. What I'm hearing is, that most of the solar panels people install are tied into the local power company grid. That means only those who have chosen to have it installed (wired) so that your house will operate on the solar panels if the local electrical grid goes...
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    Early 1970's Fairchild Transistor Question

    Thanks FuZZ1L0G1C, bertus, and Nanren888 for all of the information. I appreciate all of the time you took to find this information. When I see some of the early semiconductors in old gear that needs evaluation for refurbishing, I frequently get frustrated when I'm unable to find data sheets...
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    Hewlett Packard 6944A Multiprogrammer

    Does anyone know where I can find an exploded diagram of the HP 6944A Multiprogrammer? I've got the 'Installation and Assembly Level Service Manual', but it doesn't have any diagrams of the mechanical parts/assembly. Thanks
  14. S

    ID a circuit please

    Next time, ask the guy you buy from, if he knows what it's for.
  15. S

    What are these ??

    My guess (if you're taking guesses) is parts out of a old radio/communications or radar system. That lamp davenn pointed-out is called a 'slide base' lamp, the voltage and amperage is usually stamped on one side of the silver contact side-contacts, sometimes the actually part number. I'd...
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    DATEL D/A Converter DAC-V12B3D

    So far, I've contacted DATEL directly, they were amused. They had to go back to their 1974 Data Book to find the device, and said they haven't sold any of them since 1988, .... so they're at least 30 years old. DATEL apologized, because they only have a couple of guys in the office I...
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    DATEL D/A Converter DAC-V12B3D

    I know this is a long-shot, but I'll ask. I'm sitting on a quantity of these D/A Converters, and I can't remember what instrument they go into. Does anybody have an idea of a Manufacturer whose instruments used them, or an instrument model number? They're probably 20 years old, and I remember...
  18. S

    Name of "through PCB IC socket rows"

    Check the Mill-Max website, they make just about everything I've ever needed.
  19. S

    Panasonic Home Theater Red Light is On but does not Power On

    Google the make and model of your system asking about the remote control. There are probably places that sell the original replacement, or a 'universal' remote that will operate your system.
  20. S

    Cross Reference for a Hewlett Packard 1855-0566?

    It's actually a 1855-0566, no mistake. The only thing I can figure is maybe it was a proprietary part specifically ordered by HP for this instrument. HP6944A Series 200 Multiprogrammer. The manual just lists it as a FET made by, you guessed it, Hewlett Packard. I'm probably SOL, unless I find...
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