QUAD 405 transformer polymer breakdown

Hi the original EI transformer may be better than a modern toroid as the latter are too broadband in general. I think finding an original used one from one of the several Quad refurbishment companies is best.
I am not aware of any reputable Quad refurbishment companies here in the US. Any suggestions please. (eBay has some Quad repair listings which I wouldn’t trust)
 
Hi I just called one for you. A used original one costs 50 Euro ex shipping. An original new one 260 Euro. The transformer is potted and because of weight and age the transformer goes deeper in the potting stuff thereby touching the metal case causing mechanical hum.

He then said to use either a toroid or an R-core 🙂 He was aware of toroids being broadband but stated the 405 does not suffer from that. All his words.
 
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It's a real one. Those PSU capacitors are genuine, and also the transformer. You can't get either of them this century. I would worry about the transformer: it must have severely overheated, and may have internal shorts. Replace with a toroid.
There is no epoxy inside a transformer that can be released with heat. Just a case of an ex owner unsatisfied with the mechanical humm and noise and decided to pour epoxy over it to "glue"the laminations together.
 
I’m sorry, did not keep the pictures. Individual who had the unit previously is not communicating after I sent him the pictures of the meltdown. Probably thinks I may return it for a refund.
Which you should, he sold you "damaged goods".

That is NO meltdown, which would be a "solid mass" and pooled at the bottom of the unit, gluing cover to cabinet, the works, but an incredibly incompetent "gooing" or "gooping" process, probably to "cure buzz" .
Very popular in the custom Guitar pedals industry 🙄

Look at the pictures again and think of the Law of Gravity: that grey goo did not melt inside and flow down, but the amp bottom cover was removed, it was put upside down on a table and goo was poured from a can inside, over PT and some wiring, reaching transistors and heatsink.
A MESS.

The telltale signs are the hair thin "threads" around the main mass, not consistent with melting and fully explained if poured from a can.

goo02.png




Spiderweb thin threads .... even a perpetrator´s hair caught in the mess.
goo01.png


And the sheer amount of it!!!!!
A transformer may take, say, 50cc impregnation varnish, as the many distinguished transformer winders in the Forum may attest, and there you have half a liter.

Try to send it back and get a refund.

That tyro tried incompetently to "solve" something, failed, and dumped his botched effort onto somebody else.

Not involving a Lawyer, of course, but either seller refunds on his own seeing that you caught the mess/scam (your successful freight company complaint is PROOF you received it that way, and it holds in a Court of Law) or you start what I think is called a "small claims case" or similar in USA.

US members can confirm that.
PS: just curious, how much did you pay for it?
And how did you discover the mess, was some goo oozing from the unit?
It overheated from poor air flow?
That goo is partially covering heatsinks 😱

I think there is an insulating product called "liquid tape" , it might be that.

You say it sticks to your hand and you had to use solvent to remove it?
Which solvent?

Transformer varnish dries hard and does not re-melt (it expects a hot transformer 🙄 ), that was NOT Quad applied by any means.
 
Clearly you are unfamiliar with Quad 405 transformers. The Quad service manager agrees with me.
No he does not.
At most he "suspects" overheating, and yet he has never seen anything like that.
Of course, that goop was NOT applied by Quad, how could he?
And, most important, for some reason or another you are NOT showing pictures taken before shipping.
Until you do .......

Meanwhile the cheating seller enjoys your money.
 
As my post #34 clearly shows, I am talking to the OP.

I’m sorry, did not keep the pictures. Individual who had the unit previously is not communicating after I sent him the pictures of the meltdown. Probably thinks I may return it for a refund.
Which you should, he sold you "damaged goods".

And ....
Who is asking YOU for pictures?
Reread my post #19:
because I saw the insides prior to shipping.
Interesting, can you please post those pictures, for a before/after comparison?
Thanks.