Wiring for Lundhal transformers - TU-8200R What I did.

I wanted to show how I wired my Lundahl transformers, as I like detail and input from others. In case someone is looking for instructions on these, here is what I did. Feedback and criticism are welcome.

1. First I installed the mounting plate. Make sure you have the bevel for the bolt facing out. 20210520_093356_resize_2.jpg

2. Next I placed the circuit board on the Lundahl making sure it was flat 20210520_093812_resize_58.jpg
20210520_093630_resize_41.jpg

3. I soldered the corners (top right and bottom left) and rechecked if that it was flat
20210520_093800_resize_8.jpg

4. Then I soldered the remaining leads
20210520_094116_resize_85.jpg

5. Next I thinned the pads for the wires to the connections.
20210520_094348_resize_27.jpg

6. The wires were stripped fairly long, so I cut about 3/8 (10mm) off each.
20210520_094459_resize_96.jpg

7. I tinned the wires
20210520_094734_resize_65.jpg

8. Here things got interesting. Do I solder the wires up or down. I originally soldered them towards the bottom, but that made them awkward to connect to the boards, so I resoldered them going up. The leads that connect to unit one have to go a long way, and I think they have to go up to reach, but they do pass close to the transformer. In the end I stayed with them going up, as shown I these images.
20210520_095311_resize_24.jpg
20210520_095350_resize_49.jpg

Let me know if you see any obvious errors
Hope this helps someone.
 
Last edited: