I guess its time that the P1 pre-amplifier got an offering. At this point in time no costs are associated with the boards. This is a fishing for interests in this project.
kind regards,
Harrison.
An externally hosted image should be here but it was not working when we last tested it.
kind regards,
Harrison.
Douglas Self use 1K pot on his tone control to achieve high S/N ratio. But 1K pot is hard to find and then I design a tone control using 10K pot.
Will there be any significant difference if I use asingle OPA4134, which is a quad version of OPA134.
Harrison, will this be a mono board, or a stereo.
I've been looking for a preamp, so I'm Interested.
My ideal would be Stereo with pre subwoofer out, but Thats a different project.
I've been looking for a preamp, so I'm Interested.
My ideal would be Stereo with pre subwoofer out, but Thats a different project.
The term low noise really has meaning when you are working with really low signals from lets say outer space that you need to amplify by a factor of say 1000 or more, thats where the noise becomes a headache because you amplify it also.
Or for recording chains.... well.... hope the growth isn't exponential.....
However for line level signals for playback, theoretically depending on knowledge base in use it should be no big deal.
The signal should be run at a level such that it swamps the noise generated by the resistor resulting in good signal to noise ratio, also depends on the ears sensitivity to signal to noise ratios above a certain threshold.
Assumption here is that amplifier is doing 30dB
Try it out with the quad amp and depending on its structure let us know if there is any audible or measurable crosstalk 🙂. However it should be pretty low really considering the R&D put in 🙂
Noted 🙂
Noted 🙂
Noted 🙂
Its gonna be modular really so any number of channels
The pre sub would have to be its own module and if you do want that, you sure want much more 😀
Noted 🙂
The Douglas preamp by Elektor 2012 is quite a work of art, however this pre-amplifier performs the same functions with much fewer components. It will be interesting to find out how the two pit against each other.
Hi members, kindly debug and give feedback on
1. Are the pots too close? Or are they perfectly optimized? What type of knobs ?
2. Do you have prefered connectors for the input, power and output ?
3. Have you spotted any issues with layout, grounding, decoupling, filtering ?
4. A.O.B
kind regards,
Harrison.
1. Are the pots too close? Or are they perfectly optimized? What type of knobs ?
2. Do you have prefered connectors for the input, power and output ?
3. Have you spotted any issues with layout, grounding, decoupling, filtering ?
4. A.O.B
kind regards,
Harrison.
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Hi Oracle1
The thread is almost 4 years old but I would also be interested what happened to the project.
Kind Regards
The thread is almost 4 years old but I would also be interested what happened to the project.
Kind Regards
Currently you cant. The initial idea behind the P1 was to be operated as a simple* complete package without tone control defeat. The assumption being that the extra active filter stage (tone control) would be 'needed' (you would miss its absence) and would not contribute negatively but rather positively.
Your welcome to mod as you please. Have fun.
They say a good wine matures with time
Looking forward to your experience with the P1, its smarter than it looks and will couple well with many
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