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  1. (*steve*)

    Playing with valves

    And now with a 1v input signal... Note the lower gain. Here is the circuit
  2. (*steve*)

    Playing with valves

    And now with a 250mV peak signal (which represents probably the largest reasonable input signal.
  3. (*steve*)

    Playing with valves

    Here are some more pretty pictures. I'm using a 1J24B the second and third "grids" as the anode, and the anode grounded. HT is 12V, and the control grid bias is adjusted so the "anode" voltage is 6.5V. An active load is being used which provides a constant 500uA anode current. Enough of the...
  4. (*steve*)

    Wi-fi

    Your original idea worked. The easiest solution is to get another whip antenna of about the same size and to mount it in such a way you don't damage it. I would just take your broken antenna (just the whip, not the dish) and the N300 to Jaycar and perhaps to places that sell wireless routers...
  5. (*steve*)

    Battery charger circuit

    See this thread https://www.electronicspoint.com/threads/battery-charger.279898/
  6. (*steve*)

    Wi-fi

    I think the simplest solution will be the simplest solution. :) get a new antenna flatten the lip of your dish drill 4 holes in the lip (that a cable tie can pass through) drill one hole in the dish in line with the antenna and a couple of cm down from the tip of the antenna. A cable tie...
  7. (*steve*)

    Battery charger

    You should read this.
  8. (*steve*)

    Battery charger

    You also may not get 2.5V from the regulator if any appreciable current is drawn whilst running from the battery (especially as it discharges to around 2.8V, The 1117 requires about 1V of headroom from memory (yes, at 25C and 0 current, the dropout voltage is 1V -- at higher currents it rises...
  9. (*steve*)

    Battery charger

    What is IN+ supposed to do? It's certainly not connected to the regulator. It may be because you have crossing wires that are not connected and they are supposed to be connected? As it stands, if the connection is made between the in+ and the input of the regulator then the 5V will flow...
  10. (*steve*)

    Wi-fi

    FME is not one I'd expect to see. It's more likely SMA. Look at the gold coloured end of this adapter. Does the N300 end look like that? The antenna is supposed to screw into the socket on the N300, what is broken? Is it the antenna or where it screws into the N300? If it's the antenna...
  11. (*steve*)

    Wi-fi

    Yeah, the "pringles can" style of antenna were really popular. The main issue is that they are not really suited as a feedpoint for a dish and are prone to filling up with water. They can also be a bit more hit and miss regarding performance. However neither of these are likely to be an issue...
  12. (*steve*)

    Wi-fi

    Oh, better antenna beats gain most of the time. When you say you have to handle your device "carefully", what do you mean? What did you break?
  13. (*steve*)

    Wi-fi

    I believe this is the unit you have. They make a range of adapters, and they seem to use the same antenna on each. So it looks like the antenna may be removable. It should be a normal threaded connector. If it can be removed, let us know what the connector inside looks like. Unfortunately...
  14. (*steve*)

    Wi-fi

    Ok. Time to be a little more serious again. Deigh, is that N300 in working condition? It should be a simple matter to replace the antenna with something more directional. I have a small yagi that I'd strikes to requirements here, but postage to NZ would probably be ridiculous...
  15. (*steve*)

    Wi-fi

    Maybe Deigh lives in a very small room :)
  16. (*steve*)

    Was, Were, Wasn't and Weren't

    I HATE POSTS THAT ARE SO HARD TO READ THAT THEY MAKE YOUR EYES BLEED AND YOUR EARS RING AND I DONT KNOW ABOUT ELECTRONICS BUT I WANT TO KNOW THE RIGHT RESISTOR TO MAKE A SERIES OF LIGHTS BLINK AND FLASH IN TIME WITH MUSIC AND DONT TELL ME IM WRONG BECAUSE IM RIGHT AND I WANT THE ANSWER IN FIVE...
  17. (*steve*)

    What Is Happening Here?

    Curiously, only on one rail. The waveform looks like a discharging capacitor. I can see this happening if the demanded output voltage exceeds the supply rail and the power supply is incapable of supplying sufficient current to maintain even that lower voltage. However, the small class D...
  18. (*steve*)

    Arduino help

    12V and capable of 1A
  19. (*steve*)

    Arduino help

    you will require external power
  20. (*steve*)

    What Is Happening Here?

    Does it happen suddenly or does it progressively get worse as the volume is increased?
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