Building a 5e3 from an STF kit and hitting a bit of a snag... Build is complete, double checked, and powers up fine. Power tubes seem to be reading correct--425 at the first big cap, cathode voltage of 24. Amp is not making any noise, however I do have a question--I have mercury iron in the thing, and not sure if I have the two primary taps going into the right spots (of course they don't correlate to any known chart). I know I have the center tap going into the right spot, but I was wondering if I had them backwards, would the amp behave in this fashion. If this doesn't seem like the problem, where should I start trouble shooting?