No one has touched the question on how reducing power without returning affects IM I now have another one. Given that most of todays transceivers have an IM or roughly -35db "so I've been told", and
Roger, you are indeed a trouble maker. :>) Generally IM products from the exciter and the amp will add. But they could subtract too if the phase happens to be right between the driver IM products and
You can easily here the results during a SSB contest. Even a clear frequency outside the SSB window has an elevated noise floor caused by all the IMD products from DC to daylight mixing randomly. It
ORIGINAL MESSAGE: REPLY: Let me take a guess on this one. I have not measured the change in IMD with reduced power, but I think this makes sense: Most amps that we use are biased for class AB1 or AB2
ORIGINAL MESSAGE: REPLY: Let me take a guess on this one. I have not measured the change in IMD with reduced power, but I think this makes sense: Most amps that we use are biased for class AB1 or AB2
"No one has touched the question on how reducing power without returning affects IM I now have another one. Given that most of todays transceivers have an IM or roughly -35db "so I've been told", xcv
ORIGINAL MESSAGE: REPLY: Isn't that the HIGHEST number? 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listin
It's the lowest number that indicates the highest distortion products which are down the the least of the two numbers from the output. <:-)) 73 Roger (K8RI) __________________________________________
Thanks Jim, For some strange reason it took two days for this to show up in my "inbox" Remarks interspersed below. 73 Roger (K8RI) Jim Thomson wrote: I'll have to spend some time on their site and lo
ORIGINAL MESSAGE: REPLY: You are looking at only the absolute value of the number, ignoring the minus sign. When you take in the minus sign, -57 is a smaller number than -30. The smaller number, -57,
Author: "Dr. David Kirkby" <david.kirkby@onetel.net>
Date: Thu, 15 Apr 2010 13:13:38 +0100
It is not likely to clean it up, but in theory if the phase relationships were just right, you could completely cancel the products. But doing that at multiple frequencies, for multiple amplitudes is
The CATV industry answered those questions in published papers in the 70's and early 80's using then available mainframe computers. The result showed the contributions of cascaded line amps (up on t
Author: "Dr. David Kirkby" <david.kirkby@onetel.net>
Date: Thu, 15 Apr 2010 17:01:21 +0100
You are basically saying what I thought - an exact analysis is non-trivial. You don't surprise me this has been done before, but it needs more than the ability to use logs and add/subtract a few numb
It'd probably be like hitting the big winner in the lottery...three times in a row. I'll try not to stumble on the numbers, but I seem to almost always make a simple mistake when I end up with enough
Correct. But, at some point it becomes pure Gaussian noise. Similar to 20M in a SSB contest..... Most likely although I wasnt privy to the details. Ive no idea whats online, my involvement was befor
Or 40 and 75 during a summer night. I'm not one of 'ol Al's boosters, but he never claimed to have invented the Internet. It was the press and opposition that said that. http://en.wikipedia.org/wiki/
ORIGINAL MESSAGE: REPLY: It's true he did not use the word "invent" but he did claim credit for creating the internet. Quoting from Wolf Blitzer's interview with Gore: "During my service in the Unite
Al Gore invented the Great Global Warming Swindle. On a billboard somewhere along the Inter State in MN: "Gore lies Wins Nobel Prize" Doug I'll run the race and I will never be the same again. --Orig
And although many of us disagree with him politically most of us in the computing profession give him full credit for said creating. You'll find this particularly true for the leaders in the developm
It took me a class in meteorology and one in climatology to even be able to form an opinion on that. http://www.rogerhalstead.com/Warming.htm Time to get back to amps. 73 Roger (K8RI) _______________