Just to follow up on this-
I ordered a transformer and sent payment via Interac bank transfer on Feb 27.
Quote from 'Richard' was "one week to build".
Since then I've heard nothing..... 🙁 , so I sent a follow-up email today (2 weeks after payment).
I'll post the results here when I hear something from Primrose /SumR....
I got back an email reply quite quickly:
Two minutes later, the doorbell rang.
Postal delivery: transformer 🙂
First impressions:
It looks like a good solid unit.
It was packed well in crumpled paper in a solid cardboard box.
It would be nice if the label inside the plastic transformer wrapping indicated the wiring color code and voltages for the secondaries...there was a spec sheet included with the invoice that did show the full specs including color codes and 'beginning of winding' info.
Also, no mounting hardware (washer, rubber sheet) is included (or mentioned on the website, so no surprise there.)
Two minutes later, the doorbell rang.
Postal delivery: transformer 🙂
First impressions:
It looks like a good solid unit.
It was packed well in crumpled paper in a solid cardboard box.
It would be nice if the label inside the plastic transformer wrapping indicated the wiring color code and voltages for the secondaries...there was a spec sheet included with the invoice that did show the full specs including color codes and 'beginning of winding' info.
Also, no mounting hardware (washer, rubber sheet) is included (or mentioned on the website, so no surprise there.)
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They told me that they usually do the epoxy potting of the centers on a Friday, let them sit for the weekend and then ship the first of the week. That was consistent with what I experienced. I ordered my 2 800va trans on a Thursday and they were built during the next week and shipped on the following Monday.
Hello All, I've finally had a chance to catch up on the threads I'm watch and so I can now share my impressions of the SumR transformer. The package arrived 9 days after I ordered it. Richard sent me an email letting me know that it was shipped with a tracking number,
And to check carefully through the packaging to make sure that the washers were in the box as they may have gotten mixed into the newspaper they used for packing material. All seems good, although I agree that I'd like for the specs to have been printed on the transformer label.
And to check carefully through the packaging to make sure that the washers were in the box as they may have gotten mixed into the newspaper they used for packing material. All seems good, although I agree that I'd like for the specs to have been printed on the transformer label.
I thought I checked the paper packing quite thoroughly in my search for hardware..
Anyway, it's not 'rocket science' - a ziplock bag could hold the invoice and any washers provided.
EDIT: I just went out and retrieved the 'blue box' recycling from the curb and dug through the packing materials one more time. Definitely no washers!
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Did your transformers have solid epoxy centers? Mine is the standard 'donut' with plastic wrap.
Mine did not look epoxy dipped either, now that you mention it. There was also a note from Richard that read:
"When choosing a bolt and nut, make sure the top of the bolt nut and washer DO NOT touch any grounded surface above the transformer. This includes the cabinet top. A short may result."
I'm assuming this is because of the ground shielding around the transformer?
"When choosing a bolt and nut, make sure the top of the bolt nut and washer DO NOT touch any grounded surface above the transformer. This includes the cabinet top. A short may result."
I'm assuming this is because of the ground shielding around the transformer?
No- I think that's true with any toroid transformer- with or without a grounded shield .
Any conductor that 'goes through the hole and around the outside' will act like a winding on the secondary. If that conductor was a wire with its ends joined, it's obvious that it would be a short-circuited secondary winding. It's not so obvious that the (metal) case can act in the same way if a bolt through the center of the toroid 'completes the short circuit'.
It's also the reason that you can fasten a toroid to the case/chassis with plastic zip ties, but not with pieces of wire.....
That's my understanding of it...
BTW, Richard from Primrose/SumR sent me an email to let me know he'd be mailing the washers separately.
Excellent service - I'll be buying there again.
Excellent service - I'll be buying there again.
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