Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Fri, 2 Sep 2016 17:12:59 -0500
I could not agree more! Why buy used when you can buy new for $100 more? Those folks want to get rid of those radios but dont expect to lose anything in the process. However, over the past two months
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Fri, 2 Sep 2016 17:22:46 -0500
I used the term scads because I have seen new ones posted just about every other ay since the radio hit the market. That would seem unusual for a very new model, at least it does to me. When the Eagl
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Wed, 7 Sep 2016 20:50:33 -0500
I have an Orion that works fine in TX. In receive, I get signals on the band scope but no received signals pass through the DSP. I get a start up fault DSP T/O, which, I assume, means DSP time out. H
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Fri, 9 Sep 2016 17:55:46 -0500
I have available three VFO encoders for the Orion and Orion 2. All are tested and good. They are $40 each shipped in CONUSA. Add $7 shipping for OUS and AK, HI. Gary _________________________________
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Fri, 9 Sep 2016 22:19:35 -0500
Someone questioned my statement that there were scads of IC-7300 radios on the used market already. Today, there are three on QTH alone, and one can be had for ~$1050! Garbage depreciates in value pr
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sat, 10 Sep 2016 00:04:25 -0500
Companies dont take back equipment that does not perform to buyers expectations. They are only required to honor warranties for defects in parts or workmanship, NOT defects in design. They meet their
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sat, 10 Sep 2016 11:20:24 -0500
Well, for one thing, the Eagle has been in the marketplace for maybe 4 years. In addition, during the fire sale, Ten Tec gave them away fully loaded for ~$1200, thereby loading up the market with LOT
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sat, 10 Sep 2016 13:28:46 -0500
What happens if a signal that is 140 dB above the noise floor comes along, a condition quite common in Europe? Have you tested for this condition? Regards and 73, Gary W0DVN PS: I think that the rath
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sat, 10 Sep 2016 13:32:12 -0500
i have a junk Paragon in the basement. If you can wait until late this evening, I will look at it and pass along the results. Im going kayaking 73 Gary, W0DVN ________________________________________
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sat, 10 Sep 2016 23:14:56 -0500
Well, for years I have followed the listings at Sherwood, and, not seeing the explanation you presented on the site, drew what may be an erroneous conclusion. I do recall, however, his rather striden
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sat, 10 Sep 2016 23:37:29 -0500
Please understand, I have no lack of respect for Mr. Sherwood. I read his very first articles back in the day when he was beginning his tinkering with the Drake R-4C, a basically good (for its day) r
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sun, 11 Sep 2016 15:49:22 -0500
Many of us have been sucked in by the early adopter syndrome. Just look at the foolish long lines at the Apple Store when a new phone comes out... I personally bought a new 2011 Nissan Leaf. After 36
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sun, 11 Sep 2016 16:04:20 -0500
I understand and appreciate this discussion of NOISE dynamic range. This does not explain how one can get SIGNAL dynamic range higher than ~96 dB with 16 bits. These are different quantities. If the
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sun, 11 Sep 2016 16:07:16 -0500
I know all of the Rick. It still does not explain how you can digitize a signal with amplitude that is 140 dB signal above one LSB using a 16 bit A to D. Gary ________________________________________
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sun, 11 Sep 2016 16:36:07 -0500
Thank you for at least suggesting that there might be an answer. Even so, 20 to 30 dB over 96 is not enough, thats still only 128 dB, and a good analog receiver can be better than that. Good luck wit
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sun, 11 Sep 2016 17:11:22 -0500
An A to D converts an analog voltage into a digital word. Each LSB (Least Significant Bit) bit in that A to D represents a voltage, for example, 1 mV/LSB. The next significant bit contains TWO LSB un
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sun, 11 Sep 2016 17:13:50 -0500
I only picked 1 mV as an EXAMPLE. I fully understand that the designer can make it whatever he or she wishes, limited only by the capabilities of the devices available. Gary _________________________
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sun, 11 Sep 2016 17:17:50 -0500
Thank you for your response. Is this not an example of dithering? Dithering first came into my mindset when it was applied to audio, because many people were able to hear the difference between the r
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sun, 11 Sep 2016 17:26:39 -0500
Now were getting somewhere. SO, if you sample the voltage appearing at the output of a given RF input stage, and it is, say, 2 uV after scaling for whatever gain is in the front end, and the A to D L
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Sun, 11 Sep 2016 17:59:18 -0500
So the clip point is 134 dB, not 140 dB. Thus, a 134 dB above 2 uV signal, 10 KHz away from my desired 2 uV CW signal, will have no impact on my ability to receive that CW signal so long as I have se