Russian Tube Preamp, No Return, Here I go again

Problem is noise, mostly hiss, some underlying hum. Unit waits 1 minute, then defaults to 10% volume, Phono. Noise, both channels, increases both channels as volume wicreases. Noise at all 3 line inputs, however the noise is louder at Phono input.

Same noise with no input, just it's output to my Cayin which doesn't know how to make noise.

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IF it was good when shipped, only 2 things changed

1. shipping (arrived in good shape)
2. changed power cord

Could it be the Power Cord?

It’s a detachable power cord. Seller didn’t have USA, so apologized, shipped with one with two round pins (no 3rd separate ground pin). He used a voltage converter to test it with the 120v transformer he put in. He said no noise.

I could use an adapter on his cord, or a replacement cord.

I bought a USA detachable cord, same fitting at unit, 2 flat blades, no 3rd ground pin, no wider blade for orientation. Just like what comes with many TT, like my Panasonic in the shop.

Never had a problem with any cord in my system. I could switch the cord I bought for the one downstairs, but if it was a power cord issue, that would be hum, not hiss correct?

The hiss sounds to me like old/bad tubes. 

Are you absolutely certain that you have the right tube in the right socket? Because if you have misplaced the tubes in their sockets, all bets are off, and any symptoms could be explained by that, particularly the ones you mentioned. And no, the power cord is not causing that much in the way of problems. Even if you think you installed each tube correctly, I would open the chassis and take another look at where you placed each tube in relation to the instructions you were evidently given.

yes, tubes are in the correct sockets. I got photo with locations indicated from seller.

Have you double-checked to be sure you got it right?  If so, then I would take the problem to the seller and ask him to reaffirm his instructions to you regarding tube placement.  After that doesn't lead you to a solution,  you need a good tech.