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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
sailcappy OP
57 posts
 
Again I can not thank all of you enough for your trouble shooting ideas. No updates to report as of now.

As far as the SR PowerCell is concerned
1. It is not a Surge Protector
2. It does not have a Transformer
3. It does not treat for harmonic distortions.
4. All I can get out of SR is that the unit uses a EM Cell to filter AC.

DC eliminator should be ready by Friday.
sailcappy OP
57 posts
 
I had GBART make me a DC Blocker and plugged it in and it did not solve my problem. I will say that GBART created a beautiful box for me. Really good quality. I highly reccomend him if you have DC Blocking needs. BTW mine is now for sale as I do not have DC issues with my line. Check it out under DYI.

On to the Brick Wall. More info to come.
atmasphere's avatar
atmasphere
11,841 posts
 
Sailcappy, what happens if you short the input of the amp? Does it still do it?
sailcappy OP
57 posts
 
Do you mean use a cheater plug? I tried that and it does not work.
atmasphere's avatar
atmasphere
11,841 posts
 
No. I mean the signal input of the amp.
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