Mesa Dual Rectifier

[Psabin8951]

I have a problem with a multi watt dual rectifier head.
It keeps blowing fuses and a rectifier tube.
Using the light bulb mains lead method, even with both rectifier tubes out of the unit and on standby it seems to be drawing quite a bit of current. No change with power tubes also removed.
Is this likely to be the large filter caps going or any other suggestions?
Thanks in advance

[DrGonz78]

If the rectifier's are not in circuit then there would be no B+ vdc. So I can't immediately imagine the caps are the issue from that standpoint. Of course posting a schematic would be a good thing. It seems the transformer may have other windings -/+15v rails and your heater's winding. Try disconnecting all secondary connections when in doubt. Light bulb shining with secondary taps disconnected from circuit is not good. Right now from what you have written we need to clarify what you are describing and a schematic. We need voltage readings if the light bulb is not shining bright.