And the Beat goes On!
Marcelnl- that's correct, I ripped that Russian cap out of there with a pair of pliers and blow torch. Seriously some transport's may pass DC, then you will want that blocking cap, however Steve suggests a .1uf cap in this case, not .01uf as installed.
Pat- poor guy you must Jonesing for the soldering iron, here i have something for you to try.
I double-checked and the Coax Spdif signal first travels down low cost wire to the board, then the selector switch, then to the low cost .01 filter cap in question, next 2 gold pins, 8 total solder points. Get that thing out of there .. get it all out of there! I suggest one solders the Coax Spdif wire direct from the RCA jack direct to pin 2 on the Pulse transformer. Check the picture 4 for details. Picasa Web Albums - Bill - Chameleon
However if I were you Pat, I would remove the Pulse and solder this wire direct to your Lundahl input transformer. Run the primary "ground" to pin 2 and take advantage of the existing surface mount 75 ohm resistor. Hook the secondary to the existing pins 3 & 4. (If the Lundahl won't solder direct to pins 3 & 4 forgo the pliers and blowtorch and go with the duct tape).
I have had my Chameleon running at 9V DC for 24 hours without any sign of overheating, I have read where some guys prefer 10V DC with 16 TDA1543 DAC chips. As long as the chips are being cooled or heat-sinked apparently they can handle it. This on the other hand could be DIY folklore and you would be headed for a meltdown.
At the moment I have mine set at 7.85V DC with the yellow wire and really like the sound. I hear no benefit with the higher voltage as configured. However as I increase the voltage I have the suspicion the power supply is starting to sag even on the yellow wire. There is obviously a tipping point here somewhere, the question is who wants to be the one to push the limits. Woody you ready to sacrifice your Valab? (I have lots of extra 1543 DAC chips, I will experiment when time permits).
I have to say that Rhodes has me intrigued with using a Paul Hynes SR1-MR with a more heavy duty power transformer. Scottie ... more power!