Erich,
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Very nice work on the case!
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One mod you might want to do is Allison's power flattening on uBITX.net:
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I do this to all ubitx that I work on and own.? It has always more than doubled the output on 10 meters.? It also moves the 40-meter dip in power to 30 meters.? Reflections from the impedance mismatch caused by the Q90 input impedance cause the dip.? I have determined that this is the cause of the output drop on 40 meters with bench measurements.? If I remove Q90 and replace it with a 50-ohm resistor, oscilloscope measurements verify that the output of the first mixer goes to a square wave at the fundamental frequency.? I have yet to work out a solution to this issue.? I stopped working on the uBITX when the sbitx came out.
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73
Evan
AC9TU
