Michael_Hml
Stunt Coordinator
- Joined
- Sep 25, 2002
- Messages
- 75
I'm 99.99% sure I calculated this correctly, but I guess I'm just looking for a second opinion before I go and hook this all up.
I've got a pair of Audisource Amp Two amps that need remote turn-on. They have signal-sensing auto power, but I'm finding that during movies when there isn't much activity in the side or rear surround channels, one or both of the amps will shut down.
So, my idea was to add a relay turn-on to a power strip, then plug the amps into that and run a 12v control line from my pre/pro to the relay. The issue with that, is the 12v out on my pre/pro is a max of 50mA, and all of the power relays I've been able to find with a 15A rating have a coil load of more than 50mA. That left two options, either use dual relays, an external power source and step up to a larger power relay to control the power strip, or go to a smaller relay for the strip.
I found a miniature power relay that has a 30mA 12vdc coil and is rated at 10A/120VAC at RatShack - catalog # 275-248.
According to the back panels, each amp draws 350w - so at 700w for the pair, am I correct in calculating that the load comes out to a bit under 6A and this relay should be sufficient to handle this?
Also, it's got PCB contacts on it - should I be concerned about soldering 12g stranded wire (from the AC cord on the power strip) directly to the leads without a PCB?
Overall, is this the right way to go, or should I really just do this with two relays/external power and use a larger main relay with spade terminals?
Thanks for any advice.
-Mike
I've got a pair of Audisource Amp Two amps that need remote turn-on. They have signal-sensing auto power, but I'm finding that during movies when there isn't much activity in the side or rear surround channels, one or both of the amps will shut down.
So, my idea was to add a relay turn-on to a power strip, then plug the amps into that and run a 12v control line from my pre/pro to the relay. The issue with that, is the 12v out on my pre/pro is a max of 50mA, and all of the power relays I've been able to find with a 15A rating have a coil load of more than 50mA. That left two options, either use dual relays, an external power source and step up to a larger power relay to control the power strip, or go to a smaller relay for the strip.
I found a miniature power relay that has a 30mA 12vdc coil and is rated at 10A/120VAC at RatShack - catalog # 275-248.
According to the back panels, each amp draws 350w - so at 700w for the pair, am I correct in calculating that the load comes out to a bit under 6A and this relay should be sufficient to handle this?
Also, it's got PCB contacts on it - should I be concerned about soldering 12g stranded wire (from the AC cord on the power strip) directly to the leads without a PCB?
Overall, is this the right way to go, or should I really just do this with two relays/external power and use a larger main relay with spade terminals?
Thanks for any advice.
-Mike