Took a chance and bought an used Noisecom noise source from one of those sellers in Israel
![Azn ^-^](https://www.eevblog.com/forum/Smileys/default/azn.gif.pagespeed.ce.7t5xC2ZH_H.gif)
Noisecom are making some really nice noise source, but I could not find any information on the one I bought. Model number NC4327. The device was supposed to be functional but when it arrived, I tested the supply and it was shorted. I contacted the seller and was fully refunded. Great, got a broken noise source for free
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/xsmiley.gif.pagespeed.ic.R8GFI-pF6f.png)
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=853858;image)
I opened up the device and simply started testing all the tantalum capacitor one by one. The capacitor directly on the input just before the 7815 was shorted. Replaced by a similar capacity ceramic cap and the device is now working.
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=853846;image)
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=853850;image)
Now the moment of truth, Let's find out what this noise source is outputting.
![](https://www.eevblog.com/forum/testgear/test-equipment-anonymous-(tea)-group-therapy-thread/?action=dlattach;attach=853854;image)
24dBm, from DC to 14kHz
![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/xfacepalm.gif.pagespeed.ic.EBDwh1hCfo.png)
Was hopping for something in the Ghz range
![Sad :(](https://www.eevblog.com/forum/Smileys/default/xsad.gif.pagespeed.ic.L3FGyzQrjB.png)
Now I will probably try to extract the noise source diode and use it with some modern amplifiers to see I can crank up the frequency range.