The low voltage is probably your problem. I would think 3 volts is too low for the microphone element. I know 3 volts is too low for proper operation of the microprocessor, and since you have not said anything about other strange symptoms, I would first check your voltmeter. Do you read 5 volts or 3 volts at the output terminal of RF Board U8 - it should be 5 volts. If you read 3 volts at RF U8, try an different voltmeter.
Is the regulator getting quite warm? If so, you may have a fault on the 5 volt line somewhere. If it is not heating up, the most likely reason is a bad regulator. 73, Don W3FPR On 2/25/2011 9:24 AM, KA1YMX wrote: > The 5v regulator U5 on the control board has an output of 3.0v. I > disconnected the front panel from the control panel and the output is still > around 3.0v. Do you think the lower voltage could affect the operation of > the microphone? > > I also noticed there is an update to grounding the microphone jack. Could > the lack of ground some how cause this? ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
