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

WilliamTK1974 · 5th May 2017, 2:43 am

T11 and T12 weren't in a socket. They were in a plastic mold that bent the collector back from the emitter and base. It just looked like a socket.

I desoldered them carefully one at a time and tested them with my inexpensive analogue multimeter. According to the test procedure I used, they both test as good transistors. So, I used my 30W soldering iron to put them back.

Problem is, nothing has changed. I thought it was possible the solder joints could have been bad and that re-soldering them would fix that. But there's still no sound and the Tp2 transformer is still getting hot. What next?

5th May 2017, 2:43 am	#11
WilliamTK1974 Tetrode Join Date: Feb 2013 Location: Chattanooga, Tennessee, USA Posts: 59	Re: Problematic Spidola 231 T11 and T12 weren't in a socket. They were in a plastic mold that bent the collector back from the emitter and base. It just looked like a socket. I desoldered them carefully one at a time and tested them with my inexpensive analogue multimeter. According to the test procedure I used, they both test as good transistors. So, I used my 30W soldering iron to put them back. Problem is, nothing has changed. I thought it was possible the solder joints could have been bad and that re-soldering them would fix that. But there's still no sound and the Tp2 transformer is still getting hot. What next?