Pinkmouse-
How would you feel about using Per-Anders' approach with "lossless resistors" (caps) instead of a tranny and maybe adding a small voltage regulator for good measure?
http://home.swipnet.se/~w-50719/hifi/sst01/index.html
How would you feel about using Per-Anders' approach with "lossless resistors" (caps) instead of a tranny and maybe adding a small voltage regulator for good measure?
http://home.swipnet.se/~w-50719/hifi/sst01/index.html
How about an AC entry board with thermistors?
Design allows for use of pcb mount IEC connector, which also screws to the back panel. The spacing for the connector places the board 1/8" from the back panel, so this shouldn't violate any code?
A standard panel mount fuse holder is intended to be wired in series with switch, so that the amp can be serviced without being opened up.
The color notations are based on the Avel Lindberg colors.
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Brian
Design allows for use of pcb mount IEC connector, which also screws to the back panel. The spacing for the connector places the board 1/8" from the back panel, so this shouldn't violate any code?
A standard panel mount fuse holder is intended to be wired in series with switch, so that the amp can be serviced without being opened up.
The color notations are based on the Avel Lindberg colors.
--
Brian
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I have repaired too many cinema automation pcb's who's traces were vaporized by some component failure down the line. Even heavy traces will vaporize!! As a result of this experience I prefer to hard wire all my AC stuff. I like the power supply board the way it is..... but without the AC stuff on it.
Mark
Mark
Hello,
I too would like to support the design of a "Super De Luxe" Amplifier / PSU control module.
Additional idea's for this:
- AC mains DC current protection
- Remote On/Off soft-switch input
- Remote Low-Power-Mode soft-switch input
Brian, about your AC entry board:
- Fusing the safety ground? Is this a good idea?
- I would use a DPDT switch to switch (Hot and Neutral) the AC mains?
- Like already posted, an AC receptacle directly soldered to a PCB will probably cause the connections to the board to fail because of mechanical strain.
- I would use numbers (more neutral) instead of colors for the wiring of the primaries of the power transformer.
Henry.
I too would like to support the design of a "Super De Luxe" Amplifier / PSU control module.
Additional idea's for this:
- AC mains DC current protection
- Remote On/Off soft-switch input
- Remote Low-Power-Mode soft-switch input
Brian, about your AC entry board:
- Fusing the safety ground? Is this a good idea?
- I would use a DPDT switch to switch (Hot and Neutral) the AC mains?
- Like already posted, an AC receptacle directly soldered to a PCB will probably cause the connections to the board to fail because of mechanical strain.
- I would use numbers (more neutral) instead of colors for the wiring of the primaries of the power transformer.
Henry.
I'm down with ALL the BrianGT stuff... AVID JUNKY
No, fusing the ground bond is contrary to NEC code. I suspect it was an oversight...
This covers neutrals AND ground bonds.
NEUTRAL FUSES (from the 1915 NEC)
Rule 23a specifies that a (fuse) must not be placed in any permanently grounded service wire.
Rule 23b specifies that the fuse must be omitted in any permanently grounded wire, except where a two-wire branch circuit is derived from a grounded-neutral three-wire system, in which case the fuse MUST be inserted.
No, fusing the ground bond is contrary to NEC code. I suspect it was an oversight...
This covers neutrals AND ground bonds.
NEUTRAL FUSES (from the 1915 NEC)
Rule 23a specifies that a (fuse) must not be placed in any permanently grounded service wire.
Rule 23b specifies that the fuse must be omitted in any permanently grounded wire, except where a two-wire branch circuit is derived from a grounded-neutral three-wire system, in which case the fuse MUST be inserted.
Mark A. Gulbrandsen said:
The AC input board is seperate from the power supply board, so it can just be thrown away if you do not want to use it in your amplifier. The AC input board can be entirely optional.
byteboy said:
As for the IEC connector on the pcb, it is screwed down to the pcb and also screwed to the chassis panel, so the mechanical strain won't be too bad. There is always the option of using an off board connector.
As for fusing the safety ground, this is not done. The TH1 and TH2 denote CL60 thermistors, as used in the Pass Labs Aleph schematics. The schematic for the AC board is the same as the ones from the Aleph manuals. As for the DPDT switch, it wasn't done in the original Aleph amps, so I didn't think that it was a necessity.
As for the remote soft switch board, this can be taken on as a seperate project at this point. Rob Cheng's board would work well here, except for the use of a higher current relay.
As for the colors, they are based off of the Avel Lindberg colors. I didn't want to use numbers, as I am using numbers for the secondary AC connections, and I wouldn't want people to try to wire up the amp directly off of the mains, being confused with the similar notation.
WorkingAtHome said:
There are pads allowing for this. The IEC connector is purely optional.
--
Brian
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