200s blowing fuses

[djc]

my 200s keeps blowing fuses.  I've replaced the power transformer with a dynaco P-782, the replacement, wires were all color coded so that's tough to get wrong, installed an SDS 600v capacitor upgrade, little dicey at times but I think I followed the schematic correctly, a local tech thought it's ok too, all other caps test good.  I bought this amp blown, installed the parts and new tubes, had this tech (good tech but not an amp tech) look over my work, turned it on and everything looks fine.  powers up nice, all tubes light up, then you flip the standby and it goes a little screwy.  when I recived it the fuse was blown, now there's new parts and the fuse still blows.  any suggestions?  it is going to a real, good amp tech tomorrow but I am curious, what did I miss?

[mckinnon audio]

 Hi there, here's a trick you can try. Power up the trans. with no load on the secondary,( pull out all tubes ), flip the stnby. sw., if it blows a fuse you've got a bad  trans., probably partial short on H.V. winding. Or you can plug the trans. into a watt meter ( old school ) if it draws watts,it's bad. Also check for shorts from tube sockets to gnd. Good luck, Mel.

[Soundmasterg]

If you've wired up something wrong, then that could certainly account for the fuse blowing. You could have an arced tube socket too. Best approach is to pull all the tubes and see if the fuse still blows as mckinnon suggested. If it still blows the fuse, then unsolder all the secondary wires of the power trans and make sure they aren't touching anythin. Then turn it on with a good fuse again and see what happens. If it doesn't blow a fuse then the PT is ok. If it does blow a fuse, then its bad. If it doesn't blow a fuse this way, then something in there is causing a short, and you'll have to find it.