Recommended replacement PS transformer for Mk4/

I think the PS trans on one of my VTA Mk4 has bit the dust. Any suggestions much appreciated.
While I was replacing the coupling caps, I noticed I hadn't put a jumper wire from lug 2 to lug 3 (grnd) of the 5 lug strip. This takes the gr-yel wire from the PS transformer to grnd. I guess it had been working without the jumper all along. The other amp has the jumper and it works a-ok, too. After I hooked up the jumper I started blowing fuses. So I disconnected the jumper but it continued to blow fuses. To the point of running out of fuses. Tried a different 5ar4, same result, blown fuse. Switched 12at7s, same result. So I did the Cardinal sin and put in a larger fuse. This resulted in a little smoke from the ps transformer. Shut it down imediately. I suspect this transformer is toast, if not before I got creative with it, certainly after. Is there any way I can test it to be sure it's the problem, or only problem? All was working well before I started this. Thanks, Gordy

Well after looking at the transformer schematic, I pulled all the tubes and measured the resistance on both transformers for comparison. There's no leakage from primary to secondary. They measure identical on everything but the red to red, red to r/y. Here's what I got on these...

Good transformer.... red to red-181.4 ohms
pin 6 red to red/yellow-87.5 ohms
pin 4 red to red/yellow-94 ohms

Bad transformer..... red to red-26 ohms
pin 6 red to red/yellow-50.9 ohms
pin 4 red to red/yellow-51.8 ohms

Does this confirm a bad transformer?

[b]Hi Gord,
Appears your power transformer's high voltage secondary
winding failed. Measuring the resistance here on one of our new
Dynakit PA-135 replacments, I get 176.2 Ohms. I expected this to
be slightly lower than the original since we adjusted our design
for 120 vac at the Primary as opposed to 117 vac with the original
Dynaco.

To be absolutly sure it is the power transformer, which is likely,
after removing this...tape off exposed leads except for the (2)
Black primary's and the (2) Red secondary's. Apply 120 volts to the
Primary leads and measure the voltage at the Secondary Red leads.
This should be around 365 to 380 vac. A safer method would to use a
variac working with a lower voltage at the primary side. The turn
ratio is roughly 3:1 which with 25 vac at the primary will yield about
75 volts at the secondary. Just enough volts to get your attention if
you should slip...Let's hope not.

Hope this helps you out...If needed, I have stock on the PA-135's

Regards, Kevin @ Dynakit

Thanks Bob and Kevin. I'll run that check you suggested, Kevin. Once I sell a Sherwood, I'll call you for the replacement tranny.
Gordy