On Wed, August 26, 2009 03:10, i8cvs wrote:
Hi Jan, PE0SAT
Hi Domenico,
OK the 7806 is defective and must be changed but since you have to open the controller of G-5600 I suggest you to improve the regulator performance because the original capacitor C9 0.01 uF at the regulator output is a very small bypass capacitor.
I have replaced the 7806 and made the modifications you metioned and now every think is working like a charme :))
Solder a ceramic capacitor of 0.1 uF in parallel to an electrolitic capacitor ranging from 1 to 10 uF and solder it both at the input and as well at the output of the regulator as this cure will prevent possible autoscillations of the regulator itself in a wide frequency band.
Have fun and 73" de
i8CVS Domenico
Grazie per l'aiuto / Thank you for helping
73's PE0SAT