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Transformer impregnation: paraffin + rosin + natural wax

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001:
Hi!

I rewind vintage signal transformer
What about formula of paraffin + rosin + natural wax compound? Somebody told me 7:2:1
Any opinions?  :-//

ddavidebor:
I don't know about vintage transformers but I know about cosmetic formulation.
You can buy paraffin in different molecular weight (from oil viscosity to hard wax) and mix it to obtain the properties you prefer.
Rosin was probably because it behaves like a flux.

There is no point in having precise paraffin/wax ratio as the end result depends on the molecular weight.

Gyro:
If rewinding a vintage transformer, I would still use modern high temperature formulations, ie. Polyurethane.

After all, you can't reuse the original wire or degraded insulation and you need to bring it up to current safety standards.

001:

--- Quote from: ddavidebor on September 05, 2019, 07:37:57 pm ---
Rosin was probably because it behaves like a flux.

There is no point in having precise paraffin/wax ratio as the end result depends on the molecular weight.

--- End quote ---

I think what rosin increase solidus temperature of clean paraffine. But what about wax? Is it for wetting reason?

Does anybody know some vintage articles about DIY transformers?



--- Quote from: Gyro on September 05, 2019, 07:44:39 pm ---If rewinding a vintage transformer, I would still use modern high temperature formulations, ie. Polyurethane.

--- End quote ---
Hi. It is dodgy technology tread  :-+


--- Quote from: Gyro on September 05, 2019, 07:44:39 pm ---  you need to bring it up to current safety standards.

--- End quote ---
We free from standarts here. 100% of liberty

Gyro:

--- Quote from: 001 on September 05, 2019, 07:47:04 pm ---Hi. It is dodgy technology tread  :-+

--- End quote ---

Ah, I missed that!  :)

Dodgy results to follow.

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