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#1801 |
R.I.P.
Join Date: Jul 2004
Location: Scottish Borders
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Apex has shown a triac style speaker protector that can be added to the speaker rather than to the amplifier. It uses the speaker signal to trigger itself.
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regards Andrew T. |
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#1802 |
R.I.P.
Join Date: Jul 2004
Location: Scottish Borders
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Soft start is usually applied to the mains switching before the mains transformer. It would be less safe to incorporate all the mains switching to a PCB that also connects to the speaker cables.
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regards Andrew T. |
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#1803 | |
diyAudio Member
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Quote:
In this setup on your photo you did use the 'jumper' on the PSU boards, to connect the two grounds. But in my setup with the two PSU boards separated, should I connect this 'jumper'? Or put a ground wire of each PSU board to the F5T convertible AMP board? Because on the AMP boards there is a coppertrack on both sides connecting the two PSU-G 's. So i think I will introduce a ground loop if I connect the 'jumper' on the PSU boards also... Are you still with me? Sorry if it is not clear...
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Pass F5, F5Tv3, ACA, Aleph J, DDDAC1794, DCB1, BA3-preamp, VFET CSX1, Pass F6, Pass M2-HPA, VFET-X balanced, Pass J2 |
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#1804 |
diyAudio Member
Join Date: Oct 2010
Location: Burlington, NC
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That point becomes star ground. It is from that point that you ground the entire circuit to earth through the CL60/Bridge combo(Ground lift). What is important is that you have a central point to return all the power grounds to. The main board becomes your star ground for the signal wires. In truth, you could take signal grounds to PSU as well, but it is convenient and noise free just to take them to the boards, plus it allows for twisted pairs to the inputs and outputs.
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...Shape the sound , Man! |
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#1805 |
diyAudio Member
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Thanks for your answer, Buzz !
I don't understand the last lines... Made two pictures of what I mean. Which one is preferred? Grounding of an Amp is always an issue... ![]() Grzz, Walter
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Pass F5, F5Tv3, ACA, Aleph J, DDDAC1794, DCB1, BA3-preamp, VFET CSX1, Pass F6, Pass M2-HPA, VFET-X balanced, Pass J2 |
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#1806 |
R.I.P.
Join Date: Jul 2004
Location: Scottish Borders
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Trace out the route followed by the speaker current from PSU back to PSU for both schemes.
I think you will find that both are flawed.
__________________
regards Andrew T. |
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#1807 |
diyAudio Member
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Hi Andrew, this is better?
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Pass F5, F5Tv3, ACA, Aleph J, DDDAC1794, DCB1, BA3-preamp, VFET CSX1, Pass F6, Pass M2-HPA, VFET-X balanced, Pass J2 |
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#1808 |
diyAudio Member
Join Date: Oct 2010
Location: Burlington, NC
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Neither are ideal, but the first one is best option. I dont expect noise issues, but you know where to look if you have them.
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...Shape the sound , Man! |
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#1809 |
diyAudio Member
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Thanks for helping! Is there a better way to do it, with this setup?
I'm very open to suggestions ![]()
__________________
Pass F5, F5Tv3, ACA, Aleph J, DDDAC1794, DCB1, BA3-preamp, VFET CSX1, Pass F6, Pass M2-HPA, VFET-X balanced, Pass J2 |
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#1810 |
diyAudio Member
Join Date: Oct 2010
Location: Burlington, NC
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I would try it and see if there is even any issue.
__________________
...Shape the sound , Man! |
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