Guy 13: surely there is someone in VN that can repair an electronic circuit as simple as a plate amp. Think positive! 
Hi Hank and all Audio Circle members.
Think positive you wrote.
Come here for a week and you will see that it's not easy to think positive.
After 18 years in Vietnam,
if I did not think positive I would be swinging at the end of a rope by now.
Electronic repair man,
there are plenty of that here,
however, to find a good one, well I am still looking for one.
For 18 years I've being selling and repairing electronic flashes,
if it's just a matter of swapping a PCB no problem,
but finding the problem and replacing a chip, that I don't want to do.
I will give the plate amplifier to our gooffer or go for guy
and he will look for a repair store.
I have no time to go around the city to look for one.
Today I spent two hours repairing all the ground problems
I had in my listening room and found out that all the wall outlets
have different colors for the hot, neutral and ground,
no standard black and white and green.
Now it's all fixed, but I found a problem with my two weeks old
Made in Vietnam auto-voltage regulator.
The main power switch is defective, it won't go off, always stay on.
Tomorrow, I will go to the store and they will repair it under warranty.
Lucky me.
Guy 13