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"Noisy DSP experiences".

Forum: Articles
Subject: An Interesting CQ WPX CW Experience

The "noisy DSP" phenomena is well known. Rob Sherwood has also identified this problem and has written about it.

I have  the following radios
K3
K2
Flex5000
IC7700
Perseus

ALL the above radios except the K2suffer from  the noisy front end problem when mild QRN is around.  It sounds like these radios have a reverb unit on the receiver which multiplies static and pulse noise.

Elecraft claims to have  a cure for this problem, however I still find the receiver noisy. The K2 I  prefer over the K3 on CW when there is  QRN around. The filters on the K2 sound better on CW when there is QRN about.

It amazes  me every time that I turn on any of my old old analog radios like the TS830S or the FT1000D and do a comparison. The QRN all of a sudden becomes tolerable and not so nerve wrecking. 

The TS830S is still my favorite low band radio for picking  weak signals out of QRN on  160 and 80 meters. This is especially so when there is a lot static and QRN around.

Its unfortunate that there is no current model  analog transceiver manufactured that has  fantastic receiver  dynamic range numbers like the Elecraft K3. The only option available is  to build  your own like the PA3AKE H-mode mixer high performance receiver.

http://www.xs4all.nl/~martein/pa3ake/hmode/






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