[Elecraft] Fix for Gamma HPS PSu's

[Paul J. Cort-Wright]

Hi,

    Those of you having trouble with audio noise from Gamma HPS 1A  Psu the following from the manufacturers:--


 Some of our production units were shipped with slight instability in the switching power supply control loop.  A surface mount resistor needs to be changed to a new value.  If you have access to 0805 resistors and tools to replace them on printed circuit boards, you will need to access the bottom of the switching power supply PCB and change resistor R25 from 2000 ohms to 2700 ohms.  This will stop the high pitched sound.

They are very apologetic and hope its works 

 73 Paul G3SEM