PCB board
Hi RJW, just wondering if your single side board download file VSPS 45G is complete, I down loaded the file and all It shows is the black traces and pads is there another version I am new to electronics so please bear with me
Jezza
Hi RJW, just wondering if your single side board download file VSPS 45G is complete, I down loaded the file and all It shows is the black traces and pads is there another version I am new to electronics so please bear with me
Jezza
answered elsewhere, but for future reference: In Eagle, press the ratsnest button to fill the polygonal traces.
VSPS rev. 50a
Eagle .brd file attached.
Changelog:
Eagle .brd file attached.
Changelog:
- Added thermal isolation of power and ground planes.
- Added optional C8, C9, 0.1 uF ceramic bypass caps for decoupling high-bandwidth op amps.
- Removed the alternate C3 cap mounting position to fit Black Gate NX. These caps were discontinued many years ago and are essentially no longer available.
Attachments
Richard I was browsing today around the DCB1 sections and I found this topology diagram.
Since the cartridge output is inherently balanced, you think something similar could be done with 4 boards of VSPS or Phonoclone?
The reason I am asking is that I plan on replacing my pre with a passive one, but since my amp is balanced only, I will have to use a 1:1+1 transformer to get hot and cold signals and perhaps a buffer if the attenuated signal is not enough to drive the transformer.
So making the phono balanced will solve the transformer issue for me (athough it will make phono and pre construction a lot more complicated)
Since the cartridge output is inherently balanced, you think something similar could be done with 4 boards of VSPS or Phonoclone?
The reason I am asking is that I plan on replacing my pre with a passive one, but since my amp is balanced only, I will have to use a 1:1+1 transformer to get hot and cold signals and perhaps a buffer if the attenuated signal is not enough to drive the transformer.
So making the phono balanced will solve the transformer issue for me (athough it will make phono and pre construction a lot more complicated)
It's electrically feasible, but unlikely to be worth the expense and complexity.
Incidentally the noise for a balanced phono pre is 3dB higher than an unbalanced one. That's because each phase sees an input signal that is half the total cartridge output voltage.
Incidentally the noise for a balanced phono pre is 3dB higher than an unbalanced one. That's because each phase sees an input signal that is half the total cartridge output voltage.
I know... 🙁 Sometimes I want to change my amp just for his lack of SE inputs...
At least it has a huge input impedance (200k), so I hope it can be easily driven with the passive pre and the transformers.
At least it has a huge input impedance (200k), so I hope it can be easily driven with the passive pre and the transformers.
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