sv_clintrace999
New Member
The only thing I can suggest at the moment is to put a bridge on the output of the transformer, by connecting the two outer leads to the AC points on the bridge. The 0v wire (the centre-tap) goes no-where.
Try this for a few minutes and see if it cures the problem. This will create additional heat in the 2N3055 but will be ok for 30 seconds.
This is very helpful Mr. Colin, one thing i was afraid of is that is it possible that if the regulator will be damaged (due to short circuit,excessive heat etc..), the unregulated part of 18-20vdc will go directly to the transceiver? I don`t have any overvoltage protection for this diagram..