1
General Questions / Re: Aion Blueshift
« on: November 20, 2020, 08:19:35 AM »
The signal always passes through a pre/de-emphasis network, while they're supposed to be neutral, they pretty much always audibly impact tone, so that could be what you're hearing?
The signal has to pass through IC2 pin 7 to reach the BBD's and the output of the BBD's is pin 7&8, if your audio probe is definitely working and there's not something weird going on, you can't possibly have any modulation.
Could a bad cap on the compander be the cause? Possibly... I mentioned Tayda tantalum capacitors because last time I tried to use one for digital power filtering it ended up injecting noise rather than removing it and I've avoided them since, I've also heard of their electro's simply being shorts.
Signal comes from IC1 pin 7, goes in to the companders input at pin 6, comes out at pin 7.
The signal has to pass through IC2 pin 7 to reach the BBD's and the output of the BBD's is pin 7&8, if your audio probe is definitely working and there's not something weird going on, you can't possibly have any modulation.
Could a bad cap on the compander be the cause? Possibly... I mentioned Tayda tantalum capacitors because last time I tried to use one for digital power filtering it ended up injecting noise rather than removing it and I've avoided them since, I've also heard of their electro's simply being shorts.
Signal comes from IC1 pin 7, goes in to the companders input at pin 6, comes out at pin 7.