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#1
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Time Delay for Power Amp Startup and Shutdown ?
I have an Adcom G555 for my mains and a homebuilt Leach DBA for my sub, each
of which draw enough power on startup to dim the lights a bit (the Leach has an MOV to control this problem or it would probably blow the breaker). I currently make sure that the power amps go on last and are shut off first to protect the speakers from transient thumps. Is there a way or a product with appropriate time delays built in that would automatically accomplish this same function so that I can have a master power switch for the entire system? - Magnusfarce |
#2
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Magnusfarce wrote:
...snip.. Is there a way or a product with appropriate time delays built in that would automatically accomplish this same function so that I can have a master power switch for the entire system? - Magnusfarce There are a few out there. One such device would be the Furman power sequencer model PS-8 or PS-8R. Later... Ron Capik -- |
#3
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Randy Slone has a couple nice devices in his book, there are also some
schematics on the Elliot Sound Products site -- I use a surplus relay driven by an IRFD110 -- the relay has a 10 ohm, 35 watt resistor in series with the power line. The maximum current draw is thus 110V/10R = 10A. The device waits about 200 milliseconds to completely power on. You have to make sure that the FET discharges, however, with a ground return circuit. It gets pretty nasty if you startup and quickly restart -- it isn't as simple as it looks. "Magnusfarce" wrote in message ... I have an Adcom G555 for my mains and a homebuilt Leach DBA for my sub, each of which draw enough power on startup to dim the lights a bit (the Leach has an MOV to control this problem or it would probably blow the breaker). I currently make sure that the power amps go on last and are shut off first to protect the speakers from transient thumps. Is there a way or a product with appropriate time delays built in that would automatically accomplish this same function so that I can have a master power switch for the entire system? - Magnusfarce |
#4
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I am using a rather large dual power amp system. I leave the sound system on
24/7. I simply turn the volume down to zero when it is not in use. This is the best resolve for the problem. The idle current is fairly low, therefore there is no excessive heat or wear. I have this system since about 1988, and it has only been shut down when changing locations one time, and during power failures. -- Jerry G. ====== "Magnusfarce" wrote in message ... I have an Adcom G555 for my mains and a homebuilt Leach DBA for my sub, each of which draw enough power on startup to dim the lights a bit (the Leach has an MOV to control this problem or it would probably blow the breaker). I currently make sure that the power amps go on last and are shut off first to protect the speakers from transient thumps. Is there a way or a product with appropriate time delays built in that would automatically accomplish this same function so that I can have a master power switch for the entire system? - Magnusfarce |