[Elecraft] ngen White Noise Generator

[W3FPR - Don Wilhelm]

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
>