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  1. Martaine2005

    Changing a tweeter with a speaker.

    To be honest I have never tried. So I cannot really answer that. Maybe somebody else here can answer that. Martin
  2. Martaine2005

    Changing a tweeter with a speaker.

    Agreed, which is why I said small speakers. The OP said about changing the tweeters for small speakers. Yes you can. That will give you 8 ohms. The power/wattage issue will only be a problem with small speakers if you turn the amp up. The small speakers could blow/short and fry the amp. Martin
  3. Martaine2005

    Changing a tweeter with a speaker.

    Hi Neonserg, I am not familiar with diffusers. Do you mean a full range speaker has no top end frequencies? It is not a good idea to use any speaker with a lower impedance than the amplifiers specifications. If the amp is rated for 4 ohms, then other impedances upwards can be used. ie. 8, 16ohm...
  4. Martaine2005

    Transistor bias configuration

    Nice first post Joe. Shame you was bored enough to register.. I am that blunt knife!! But my blunt blade doesn't tell the sharp blade what to cut!! Just a note..;) Martin
  5. Martaine2005

    Signalab V5 Battery Management System

    You mean transistor? If you got the same resistance from the smd resistors, you can guess that it's functioning properly. Provided of course the resistors are all the same value. You may have shorted one of the transistors and it's constantly powering that other led. Trace that led back to the...
  6. Martaine2005

    Activate transistor with piezo disc

    I did find the schematic you are looking for. Martin:D
  7. Martaine2005

    Signalab V5 Battery Management System

    Are you sure it's not the led? Have you traced back the pcb to that 'white' resistor and found it's the current limiting resistor for that led? EDIT: Copied and pasted. P Channel MOSFET AO3401 A19T 4.2A / 30 V SOT23 MOS SMD Triode Transistor Martin
  8. Martaine2005

    Hello everyone

    Hi AJM, welcome aboard. I too am here to learn. But cave diving sounds painful, I'll stick to small electric shocks:) Martin
  9. Martaine2005

    Signalab V5 Battery Management System

    Hi AJM, Not sure about the si2333. But it is a P channel mosfet as well. According to aliexpress, It is also an AO3401. Googling A19T gave me a few results. Check it out.. Regarding the other component, the board seems to go...Cap, resistor, cap, resistor etc. You could check the resistance of...
  10. Martaine2005

    Demodulated RF to Composite (Pocket TV Hack)

    Hi jc0r, I have several of these old pocket tv's. But mine also have a video out too. As the video said, the ribbon cable to the lcd is probably where you want to look. It will probably be just two contacts.a ground and the signal out. You would have to play with them to find out which is...
  11. Martaine2005

    Searching for capacitive touch screen controller

    Hi, This web page might be of some help. You can always contact them with your question. https://touch-base.com/documentation/Identifying%20touch%20screen%20controllers.htm Martin
  12. Martaine2005

    Transistor bias configuration

    They do diet! This one shed a little weight. Martin
  13. Martaine2005

    Phone with two ear phone sockets

    Ha, completely forgot about that!! Martin
  14. Martaine2005

    Security Sucerity

    Hi CB, I doubt it's a power problem. But by all means power it as you said to eliminate that factor. Have you tried moving it a couple feet either way? It could be as simple as that. My wifi camera and a 2.4ghz camera gets knocked out completely when the microwave is switched on. You could...
  15. Martaine2005

    Phone with two ear phone sockets

    Oops, that was big..
  16. Martaine2005

    Phone with two ear phone sockets

    Ok, then one of these will satisfy everybody:)
  17. Martaine2005

    Phone with two ear phone sockets

    And to add to the above post. If you do lose some volume, you can always amplify it with something like this portable amp. There are hundreds to choose from very inexpensive kits to £100's and more. EDIT: Dave beat me again.. Agreed, some phones have four terminals. My iphone does. But my Nokia...
  18. Martaine2005

    PA mixer / amp repair help

    Nice find Dorke, Martin
  19. Martaine2005

    Transistor bias configuration

    Chelsea, Chelsea.. Oops wrong forum. Martin
  20. Martaine2005

    wi-fi

    So sorry though, I should have noticed. It seems to be a normal thing for people to ask questions and disappear. Not in this thread of course. But generally. Martin
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