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Title: Expanded Boat Anchor Receiver Measurements Post by: W1VD on November 17, 2008, 10:34:32 AM Been collecting AM audio performance data in addition to the receiver dynamic range measurements. Since the amount of data is getting a bit unwieldy for a single page presentation, individual receiver measurement result web pages are now available.
Links are at http://www.w1vd.com/BAreceivertest.html (http://www.w1vd.com/BAreceivertest.html) about half way down the page. Additional receiver test results will be added soon. Title: Re: Expanded Boat Anchor Receiver Measurements Post by: w3jn on November 17, 2008, 08:53:30 PM Outstanding, Jay! A few surprises there, to be sure. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
One thing I noted when running distortion measurements using the HP E6380 - sometimes the LF distortion measurements were very much affected by inserting the E6380's 50 HZ LPF. I'm willing to bet that part of the problem is AC hum on the audio. The GPR-90, for instance, went from about 15% at 200 hz to about 3% at 30% mudulation. |