Month: February 2006

New Idea for Debug Handler

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I have been thinking about the performance issues I have experienced in playing with the GtkListView based debug handler. I am sure that it will not work out the way I wanted because too many messages come in too fast when the debug level is set to RIG_DEBUG_VERBOSE or RIG_DEBUG_TRACE. Still, I think the idea of some tool to browse the debug messages is good.

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The New Message Window

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I have finished a protype of the new grig message window, which is part of the grig debug handler. The idea is to trap debug messages from hamlib and show them in a nice GtkListView and maybe also a GtkTreeView.

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The WM-2 QRP Wattmeter from Oak Hills Research

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The WM-2 from Oak Hills Research is a cool QRP wattmeter kit, which can measure forward and reflected power in three ranges: 100mW, 1W and 10W. With an accuracy of 5% of the full scale it should be possible to measure powers down to 5mW using this instrument. The WM-2 has a big, easy to read scale and can operate either from a built-in 9V battery or an external DC source.

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OHR WM-2 Alignment

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Now that my OHW WM-2 is assembled, it is time to align it. The manual has detailed step by step instructions on this as well and the alignment procedure is relatively straight forward. On the other hand, adjusting the potentiometers can be a little difficult, partly because some of them are hidden below the wires and partly because R6 has to be adjusted with a precision of 1 mV while it has a full scale of several volts. It would have been very nice with a multi-turn potentiometer instead.

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OHR WM-2 Progress Report 3

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I’m continuing with the connectors switches and the instruments. I don’t quite understand why the assembly manual wants me to use the bottom row on the power switch instead of the top row. The switch is already mounted on the cabinet and thus the bottom row is much more difficult to access than the top row. I just ignore this step and use the top row.

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OHR WM-2 Progress Report 2

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I made further progress with the wattmeter tonight. It was time to prepare the wires, which consisted of cutting them to various lengths and removing the isolation at the ends. Here I faced the first difficulty in trying to follow the instructions of the manual.

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