Wall voltage

Just moved and have been monitoring the voltage going to my VTA ST70. Fluctuates between 116-125. Not sure the amp cares for the higher end. Thoughts, recommendations appreciated. Power conditioners are really $$$. Good to be back on the forum. Lost a job, moved, found a new gig and loving it. Bob’s and and my Fritz Carreras are a great combo in the new listening room.

I use a bucking transformer but my wall voltage stays around 123-124 so the bucker is putting out the correct voltage for my VTA ST70.

I think with your voltage taking such a wide swing you're going to be stuck with a really expensive piece of gear (not just a plain power conditioner - you'll need something that regulates the output) or you're just going to have to use a variac, watch your wall voltage and compensate.

My wall current runs between 119 and 126v. I use the "variac" recommended by Bob and set that to 117 with a meter. Less than ideal but workable.

Search the forum and you'll find what you need.

Brap wrote:Just moved and have been monitoring the voltage going to my VTA ST70. Fluctuates between 116-125. Not sure the amp cares for the higher end. Thoughts, recommendations appreciated. Power conditioners are really $$$. Good to be back on the forum. Lost a job, moved, found a new gig and loving it. Bob’s and and my Fritz Carreras are a great combo in the new listening room.

I don't think the amp cares. I have between 238 and 242 Volt here as my APC
UPS tells me ( used to computers only). ( sweden has nominal 230Volt )
If bias is adjusted when voltage is high there is no danger when voltage is
lower.

My concern is rectifier and tube longevity.

Brap wrote:My concern is rectifier and  tube longevity.

Keep bias on the low side then. And avoid hot starts.

Thanks to all. Variac coming tomorrow