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  1. dave9

    Solar Diode

    Based on one review (if they have not changed the supplier since then, which is something amazon has done from time to time with their basics NiMH cells), this has 7 cells in it for a nominal 8.4V, BUT to reach full charge you're going to need closer to 1.45V/cell for a total of 10.15V after the...
  2. dave9

    Fixing an old car century battery charger

    Two buttons does not make a bridge. Of course you can wire the bridge rectifier to only go through one diode, or two in parallel but then with an unregulated design, could be the peak charge voltage goes higher than ideal so could start to boil off battery electrolyte if end of charge is not...
  3. dave9

    Old module does not work

    ^ Exposure to it is minimal as long as you don't breathe the fumes, which you don't want to do with lead-free solder either due to the flux. IMO, vehicles are exactly where leaded solder should be used, an application where failure can lead to deadly accidents.
  4. dave9

    What is the typical mAh capacity of a 9v?

    While that 6800mAH is fraudulently rated, any with Li-Ion cells are likely to use the funny Chinese math where the tell you the capacity of the 3.7V Li-Ion cells, not the output at near 9V. I'd only use the rechargeable 9V battery in an existing product that requires that form factor to fit in...
  5. dave9

    Looking for the datasheet

    My best guess is it reads A4633Q, though even less sure about the Q, or the 6 ;) Mosfet with that package and what looks like sip5? They exist but not all that common, and it looks like the PCB marking is IC12... do the other (if there are any) transistors have an IC(n) marking or Q?
  6. dave9

    Power Supply Leads question

    I'd guess your connectors are probably something like a phosphor bronze bullet connector, throwing in the words machined or slotted might help or might not but mainly you just want the right Diameter, Length, and Amps current. A normal springed leaves type banana plug with the right D/L/A...
  7. dave9

    Position of Thermal Cutoff (Hi-limiter) in circuit

    ^ Yes, I have never disassembled something still plugged into the wall outlet. Once I have it open, I might need to plug it back in to test live, but with a plan to not electrocute myself. :D
  8. dave9

    Position of Thermal Cutoff (Hi-limiter) in circuit

    You are making no sense. There are a thousand different ways that someone can harm themselves if they open a device still plugged into mains AC, including devices that have no thermal fuse at all. No, there is little consideration whether a fuse placement will keep someone from doing something...
  9. dave9

    Old module does not work

    On an older vehicle where it presumably worked past the warranty period, probably more of a stress or heat induced crack rather than cold joint. I don't know when GM switched to lead free solder but at that point, the problem is bound to get worse... except, I don't know, maybe vehicles are...
  10. dave9

    FR & RF Thermal fuse.

    lol, I was thinking FR was more like fuse resistor.
  11. dave9

    Old module does not work

    A 480 range is going to be Celsius. It's possible that pushing in the knob will access a menu to change to F if you want, then upper range limit would be around 896F.
  12. dave9

    FR & RF Thermal fuse.

    My second guess was that FR is a one-shot fuse, while RF means resettable fuse.
  13. dave9

    FR & RF Thermal fuse.

    I'd guess FR means flame retardant and RF means retards flames, that it's in a high temp epoxy sealed can instead of plastic casing.
  14. dave9

    Newbie - attempting to repair Ford circuit board

    ^ Welcome to the forum. After 3 years, I expect that this has been sorted out already, though it is good to have more info about your workaround. ;)
  15. dave9

    Which Soldering iron should I get please?

    For that isolated use on 12ga wire, I would consider a gun style iron, and then more wattage isn't necessarily a problem as long as you don't cook the terminal too long. https://www.amazon.com/Weller-9400PKS-Universal-Soldering-Lighting/dp/B00CLU255A
  16. dave9

    Which Soldering iron should I get please?

    Wattage is only part of the story. The weller looks like it has better tips and using the chisel tip should work better for speakers than the conical tip on the Radio Shack. Plus the weller tips (at least 2 out of the 3, can't tell about the 3rd one) use a true iron tip which should get eaten...
  17. dave9

    Help identifying burnt component klipsch sw450 subwoofer

    I'm just saying that is likely. It's not my amp so I can plant fictional seeds and see if they sprout. ;)
  18. dave9

    Help identifying burnt component klipsch sw450 subwoofer

    That is a pretty good guess. Klipsch used one of those on their SW 115 too. https://translate.google.com/translate?hl=en&sl=de&u=http://www.hifi-forum.de/viewthread-225-4702.html&prev=search&pto=aue
  19. dave9

    PSU 5V line seemingly not performing

    Yeah it might be easier to use desoldering wick or a solder sucker to get the solder off then remove them as a group, though I suppose it doesn't matter much if you damage the casing picking the cement/whatever-goop off if you plan to replace them. The other option if you can identify the...
  20. dave9

    PSU 5V line seemingly not performing

    Heh, well... I was about to suggest that you should be opening the other PSU anyway to clean them both out, because the one that is pictured, either the cap to the lower right of the small transformer is filthy or it has vented electrolyte, normally there wouldn't just be one capacitor that...
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