UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

8 Tracker · 2nd Apr 2011, 6:47 pm

I may as well just come right out and admit it, I have managed to zap the + input of my beloved 7A13 plugin. I don't know how it happened, I suspect static, but the deed is done. Now the trace is right off the top of the screen.

I have removed the first transistor (Q120) from the input amp. and the trace reappears and is controllable. I tested the transistor with a multimeter and get strange readings, so I am hoping this is the only culprit. Now the real troubles begin. In the parts list, most transistors have an equivalent listed. This one just says FET, Tek spec. Part no. is 153-0559-00. I know this is a long shot, but does anyone out there have any comments or ideas as to where I might get one from? I have tried Telford Electronics and they have nothing available.

Any advice greatly appreciated.

Mark.

2nd Apr 2011, 6:47 pm	#1
8 Tracker Hexode Join Date: Jul 2009 Location: Mablethorpe, Lincolnshire, UK. Posts: 286	Troubles with a tek 7A13 I may as well just come right out and admit it, I have managed to zap the + input of my beloved 7A13 plugin. I don't know how it happened, I suspect static, but the deed is done. Now the trace is right off the top of the screen. I have removed the first transistor (Q120) from the input amp. and the trace reappears and is controllable. I tested the transistor with a multimeter and get strange readings, so I am hoping this is the only culprit. Now the real troubles begin. In the parts list, most transistors have an equivalent listed. This one just says FET, Tek spec. Part no. is 153-0559-00. I know this is a long shot, but does anyone out there have any comments or ideas as to where I might get one from? I have tried Telford Electronics and they have nothing available. Any advice greatly appreciated. Mark.