bmichels - you asked, so here is my answer:
when doing my mod first off all i will rearrange all components inside the amp to minimize cable length and better separate
- input from jack to tubes
- output from tubes to output jacks
- power lines from battery to internal power supply pcb to tubes
- improve central ground connection for both channels
the whole input path:
- i will replace all the cables and wires from the input jack to the tubes
- rewiring the connection between input jack(s) and potentiometer
- replacing the thin shielded stereo cable from potentiometer to tubes
- the tube sockets are mounted on the tube panel and decoupled from the electronic parts by thin wires to decouple the insertion movement of the pins from the solder points and electroinc parts:
- as this is start and end of output and input part .... i will replace this thin wires by 0.5mm pure silver wires or lcofc copper ones.
the power lines:
- thicker cables from battery to power switch
- adding capacitors after the power switch and a thicker cable from power switch to internal power supply board
you can keep the cables for the led's for the potentiometer as they are.
the output path:
- replacing the wires from tubes to impedance switch to output transformers and output transformers to the output jacks
ianmedium had posted a picture of this nicely modded and recabled tu-05 (can you repost it?), would be a good example for you as the layout is the original one.
GG, I think that one important way to clear the signal path will be to remove this impedence switch. This is really a signal blocker ! see the image posted before by the first guy who rewired his TU-05: the cable go DIRECT from the transformer to the board.
Myself here is my limited plan
- Use cooper cable from the transformer to the XLR headphone out. I will use the exact cable for this than the one that has been used to re-wire my TH900 balanced, so the cable is the same on the complete output path (plus the transformer is cooper)
- Remove the 1/8 jack so that the ground of the R & L transformers are not anymore connected through the 1/8 jack ( EXCEPT if I can find a 1/8 female jack that disconnect the 2 grounds when there is no 1/8 male jack inserted. Does this exist ??)
- Recabling the cables from the input jack to...as far as I can go. BUT here, I don't know what wires to use. I am not obliged to use the headphone cable, so I can choose something else. Any suggestion ?