Thomas, I don't know the design details, but I have a good suspicion that the top frequency limit of the MAR-1 MMIC amplifier exceeds the noise characteristic of the noise generating diode (D2) and the circuit board layout limitations. For more information on calibrated noise sources, take a look at the 2005 ARRL Handbook starting on page 25-27, there is one design there that may go as high as 2.5 GHz with critical construction techniques and using chip resistors and capacitors.
73, Don W3FPR > -----Original Message----- > > Anybody knows about how to increase the max. frequency on the > ngen white noise generator. There are other amplifier ships > available which reach up to 8Ghz. Does changing the chip to a > better one increase the max. frequency. > > Thomas Herold > _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
