Ordered 8/19, shipped 8/23. I would have made inquiries sooner but it was the first time I'd ordered anything with IndiaPost and I wasn't sure what to expect. It looks like they did their part but USP

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Re: LED Backlight ... It's 2 LEDs in series, the series resistor is marked 111, which I presume to be 110 ohms. Given the typical LED drops 1.3V when conducting, and supply is 5V, I = E / R = (5-2.6)

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check the condition of the Fun switch. Check the switch is actually "normally open" re check for resistance in the open state. Or replace the switch. Re-seat the LCD Check where the connection is sold

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You might be better off just modifying the microphone to use an electret mic element. Michael VE3WMB

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Martin, the calibration mode is normally only activated when pin A2 is connected to ground. However this pin is normally not used. Double-check your connections. Perhaps you have a short between pin A

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In the latest version of the B40 sketch (ver 0106) I bit-inverted the defined colors. At line 1308 I replaced the identifier 0xD3D3 with the value for my board, 0x9090, and now have a full screen disp

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Yes, topology is a wash as far as amount of drive required. But after a second look, the balanced modulator is two diodes in series being driven by two windings in series, just like the VFO. Primary d

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