TT81 for others, maybe. I've got DP80, L07D, SP10 Mk3, Lenco for "back-up".
TT101 is looking good. I am leaving it power up. Your quite right that the innards are a veritable rat's nest. I have observed that it is difficult to pack all the wiring back into the metal canister, after working on the circuit. In particular, the AC cord has to be folded just so, otherwise it won't fit. Plus there are all those interconnecting wire harnesses. My hypothesis is that the workers who built these things knew precisely how to lay out everything for final assembly. Then, after 30 years of aging of solder joints and PCB traces, we come along and take the tt's apart and cram them back together when work is done. It is my observation that incorrect routing of the wiring harnesses and AC cord followed by "cramming" can cause the various PCBs to bend a bit, thus putting stress on solder joints and tracings. I would bet this has a lot to do with our problems.
TT101 is looking good. I am leaving it power up. Your quite right that the innards are a veritable rat's nest. I have observed that it is difficult to pack all the wiring back into the metal canister, after working on the circuit. In particular, the AC cord has to be folded just so, otherwise it won't fit. Plus there are all those interconnecting wire harnesses. My hypothesis is that the workers who built these things knew precisely how to lay out everything for final assembly. Then, after 30 years of aging of solder joints and PCB traces, we come along and take the tt's apart and cram them back together when work is done. It is my observation that incorrect routing of the wiring harnesses and AC cord followed by "cramming" can cause the various PCBs to bend a bit, thus putting stress on solder joints and tracings. I would bet this has a lot to do with our problems.