[TenTec] anyone lose a centurion hv xfmr?

[John (KE5C)]

the short question is, does anyone know the approximate secondary resistance of 
a centurion hv xfmr?  the reason i want to know is that i am trying to determine 
if i've lost my centurion hv xfmr without actually measuring the secondary 
voltage.

the full story is that i had the amp on but not in use.  i thought something 
fell down in the shack due to an unusual noise.  everything looked in order, but 
then i noticed the amp was off and one of the line fuses had blown.  i took the 
cover off and saw nothing unusual and decided to replace the blown fuse and put 
the cover back on.  this seemed to bring the amp back to life, so i put it in 
line and turned the orion down to about one watt and keyed.  all seemed to work 
(i am using a qsk loop), so i advanced the drive to 20 watts and fortunately i 
was monitoring grid current because it went sky high in a hurry.  i switched the 
meter to hv, and there was none.  after some *extremely* careful 
troubleshooting, i determined the hv primary is receiving 230 vac, but i have no 
way (and little courage) to try to measure the transformer secondary voltage. 
however, the secondary resistance (with the rectifier board connected) is 
initially more than 1k ohm.  the apparent resistance falls with time due to the 
capacitors charging via the vom, and reversing the test polarity restores the 
resistance to more than 1k ohm until the other bank of capacitors start to 
charge.  this also suggests to me that both sides of the full wave bridge are 
intact.  hence, i am thinking i may have an open hv xfmr secondary, although why 
would that blow a fuse???.  i don't know what the xfmr resistance should be, but 
certainly less than 1k, right?

thanks for any comments, john