Mercury Magnetic JTM45-RI-P won’t fit.... Help.

[cluster]

Thanks everyone. I took Chuck's advice and drilled out some holes at the corners of the punch out. Used some large washers and it works. Hope to get a custom made bracket at some point to tidy it up but for now it works. thanks again.

[Chuck H]

Cool! The washers were actually mac's idea first, then Dude suggested it. No matter. Now that you've done it I'm sure you can see that there is an unsupported end on each washer. It they don't have enough footprint on the chassis and want to take an angle you could just bridge the hollow with something like thick rubber gasket material. Something a little thicker than the gap I would think. Probably no other advantage to a custom plate or bracket than appearances.

[g1]

Bloomfield's idea from post #20 would also help deal with that issue.

[cluster]

Thanks everyone. I wish I had a machine shop. Life would be so much easier. I could make my own brackets, chassis or whatever, etc...

[Chuck H]

Thanks everyone. I wish I had a machine shop. Life would be so much easier. I could make my own brackets, chassis or whatever, etc...

preaching to the choir brother cluster.

[Helmholtz]

The JTM45 reissue chassis I looked at actually do have the PT mounted 45* rotated compared to the originals. I've never heard one so I can't say if they hum.

When saying "I have never seen an exception to the rule I gave above", I meant that crossing the magnetic axes always resulted in less hum compared to parallel axes.
This might not prevent manufacturers from doing things wrong, though. Do you have a picture of the JTM-RI chassis? The orientations of the coilformers are not always obvious.

[Chuck H]

Here. I notice the OT is turned 45* as well. Though I'm not sure that helps when the PT is not mounted upright.?.

[Helmholtz]

Here. I notice the OT is turned 45* as well. Though I'm not sure that helps when the PT is not mounted upright.?.

Thanks.
Magnetic axes are at right angles as desirable.
You surely mean 90°.

[cluster]

The OT was rotated 90 degrees as well.

Here. I notice the OT is turned 45* as well. Though I'm not sure that helps when the PT is not mounted upright.?.

[SoulFetish]

For what it's worth, no Mercury replacement transformer I have ever installed has been a "drop in" replacement. Every one involved some sort of extra horseshit to make it fit. Which, whatever, I have the tools to do the metal work and even enjoy it. But, Mercury advertises replacement parts designed for a particular model of amplifier to the end consumer. So, when you run into an issue like the OP did, what could have been a relatively cheap and easy job for the customer, turns into a much larger bill in labor charges.

[SoulFetish]

In the interest of fairness, i thought I would mention that I had to swap out a faulty power transformer in an Egnater renegade yesterday. Customer wanted to go with a Mercury because this was the second Egnater PT which had failed in the amp. Mercury went i easy and fit like a charm, well, in that I was able to find enough clearance to use the original hardware without having to turn on my drill.
So, that’s a big win this time.