The Mercury

[Adam]

I have my new power transformer, Merit 3053, which crosses to Stancor P8157 which is the unit the sams says to use as a replacement for Silvertone models 9123-9126 which use the same chassis as this set.

Now the sams says when using the Stancor replacement to use a resistor to drop the voltage, and now I see why, the original transformer was tapped at (according to the riders schematic) 360-175-0-175-360, (according to the sams) 390-175-0-175-390 the Merit replacement is 375-325-0-325-375. So I don't see the 375-0-375 for the 5U4 to be a problem, but I'm going to have to drop the voltage comming out of the 6X5, I would assume that the best place to add the extra resistor would be right after the filter capacitors, also I would think a 5W resistor would be enough, but I'm not sure what resistance to use. And I don't want to connect it all up with too little resistance in there and burn something out, and if I just put resistors in there and then check the output voltage with out anything hooked to the power suppy, because it won't be drawing much current the voltage reading I'm going to get will be way higher than it actually will be with everything connected so I can't figure it out that way. Any ideas?

Also for the filaments this transformer has two 5v secondaries and two 6.3 volt secondaries, I can either just use one of each and get 5v@3A and 6.3v@7A or parallel them and get twice the amps, 5v@6A and 6.3v@14A which way should I go?