KAM.21

From: G4YFP@GB7RMS.#34.GBR.EU

Hi KAM and KPC2 owners  indeed  any  TNC  owner where the 7805 voltage
regulator fits with a screw into the front of the case just behind the
front panel. A fault can and will  at  some stage occur where the pins
of this regulator will  shear  off  leaving  your  tnc  dead or giving
strange effects on the  LED  display  or continually resetting itself.
This is caused by fatigue on the 7805 pins. Every time you switch your
TNC on/off or even move the  TNC  it  causes  the PCB to move slightly
inside it's case eventually  breaking  the pins. Unfortunately there's
not much that can be done about it except possibly fitting an internal
heat sink. So there we have  it,  maybe  its worth buying a spare 7805
reg now because as sure as  eggs  are  eggs  yours will go as mine did
over the weekend when the stores are closed. 73 de Alan G4YFP@GB7RMS..