Hi, the youtube videos do not work for me.
Nice, neat experiment that perfectly illustrates the the problem. Useful to know.CheersIan
One thing I noticed it was that you can improve the crosstalk with transformer distance, but after the initial distance improvment then the crosstalk seems to stay the same independently of the output transformer distance.So I guess in this scenario we are talking about crosstalk that is not related to Output transformers coupling, it has to do with other parts of the circuit. Am I right to assume this?Probably Grounding would be the next crosstalk contributor.Also wiring, input transformer positions, distance between BA cards.What do you think?
You can tell a lot by listening to the crosstalk on headphones. If it has no bass the it is probably capacitive coupling. This is often cause by unscreened signal wires. If it has the full frequency range then it is more likely a resistive common connection like poor grounding. Neve consoles typically achieved -90dB crosstalk figures so now you know why they used copper bus bars for the supplies and signal 0V.