Jolida Tube amp lost output one channel


So I seem to have lost output on the left channel of my Jolida 102B amp. Is it safe to assume it's the tubes and I should just replace them? All of them? I just picked this up a couple weeks ago so would hate to throw money at a lemon. I did have the speakers hooked up ass backwards, meaning they are 4-8ohm speakers and I unwittingly had one on 4 and one on 8 so maybe I damaged something more than the tubes? But, it has been working fine until I powered it up today and after the lack of sound I noted the mis wiring (it's only been that way about a week as I was trying out different speakers). Yeah, I've got a ways to go, please help?
virtualshawn

Showing 1 response by virtualshawn

Thanks, both pre amp tubes tested bad today. Replaced with some old stock Telefunkens and good to go (probably should have gone with something a little less than Telefunken but....)

what was weird about swapping the two 12AT7's that tested bad is one channel would work just fine and one dead, when I'd swap they'd both play sound just one was much quieter. Thinking I need to get the rest of my tubes checked.