Amp Shutting Down, need help


I have a Cary 7.250 brand new amp that shuts down after 20 seconds in my NYC apartment. I have sent the unit back to Cary where it tests fine. I have tried the unit at my friend’s apartment and his place of work and it works fine. The unit is 100% in working order. After talking to many people I was told to attach a 50' extension cord and low and behold it worked.

The good news is that I have a dedicated 20amp circuit to this outlet. My voltage reads 118 volts and Cary said that is not a problem as the unit will work between 90 and 130 volts. I have tested for voltage on the negative lead to ground and there is no stray voltage. I have also tried the unit on other outlets in the apartment and the same problem occurs.

My mono blocks and all other components work just fine. So I’d love to hear suggestions as to how to get rid of this 50’ extension cord?

Thanks in advance.
sailcappy
"Hi Frank, The magnetic breaker doesn't trip when the 50' 16/3 cord is used."

Uhhhh, yeeeaaah.... I was just seeing if you were paying attention. LOL!

Seems I get these A.D.D. attacks more frequently ever since upping my Cialis treatment from a PEZ dispenser, to one of those cranial-sported gravity drip-feeder apparatuses. The T.V. adds make it look so harmless.

The fact that a co-worker walked in on me wearing a L'il Bo Peep outfit, while typing, may have affected my train of thought as well. No excuses... Just sayin'

Frank
Uhhhh, yeeeaaah.... I was just seeing if you were paying attention. LOL!
08-23-12: Metro04
LOL....
.
Jim
Not quite sure what the suggestions are at this point. I have decided to purchase a DC Blocker from Gbart on Audiogon. He has graciously offered to build me one. It should be ready next week. I will up date you after it are installed.

Is the Brick Wall Surge protector something that should be installed prior to the SR Power cell or just after the SR Power Cell and the Cary? Right now I have two plugs on my outlet one goes to the SR Powercell (which has my OPPO, Theta Pre-Pro, 2 Red Dragons, Runco and Sonos) and the other goes to the JL Sub.

Thanks again.
Is the Brick Wall Surge protector something that should be installed prior to the SR Power cell or just after the SR Power Cell and the Cary? Right now I have two plugs on my outlet one goes to the SR Powercell (which has my OPPO, Theta Pre-Pro, 2 Red Dragons, Runco and Sonos) and the other goes to the JL Sub.
I had been envisioning that the Brick Wall would replace the Power Cell altogether, if it in fact solves the problem. It would plug into the wall outlet, and (assuming that you purchase the 8 outlet version) everything else would plug into it (aside from the JL sub, if its current requirements and those of everything else total up to exceed or to be uncomfortably close to the Brick Wall's 15A rating).

There would be no harm, though, in experimenting with other configurations that utilize both the Brick Wall and the Power Cell, with the amplifier powered via the Brick Wall and some or all of the other components powered via the Power Cell.

Regards,
-- Al
Cappy, I was under the impression that Brick Wall was merely *another* recommendation for your Cary's situation, just like the DC blocker, and to be used solely with the Cary *if* either device resolved its power-up problem. I would continue to use the SR for everything else, excluding the sub.

Where will the Cary be located vs. all of your other upstream equipment? Was *everything* intended to run off the new 20 amp circuit (amp, sub, pre/proc, etc)? Just trying to envision your layout.

I'm surprised you're not waiting for your friend Ken to test the AC with an O-scope rather than gamble on money spent that may not address the Cary's issue. To Ralph's point about slowing down the inrush current, regarding a sensitive mag-breaker, I would have thought the SR would've provided some amount by design, including some level of DC blocking, though unsure about the DC.

See what the DC blocker does first, when feeding the Cary directly, since you bought it already.

Frank