>> If it doesn't do the above there is something badly astray with any
>> mix or all of meter, scope, mains, transformer, brain, eyes.

> I hooked up the primaries of two Tx in series so they'll each see
> 120V and got this from each secondary, 18Vp-p. Heading in the
> general direction of sinusoidal and more like you'd expect from a
> 0-6 winding,

6 x 2 x 1.414 = 17v
As each primamry sees 230/2 = 115 you can expect that to be
17* 115/110 = 17.7v if designed for 110 (and mains could be >230 where 
you are).

> perhaps these are 120V Tx after all ?

So YES (as suspected) these are 110V transformers.
You are very lucky they are still alive.

RS should be shot.

> Any problem putting a diode in series with the primary to drop the
> voltage so I could use them ? It's only 29mA

Absolutely terrible idea !!!!!!!!!!!!!!!!!!!!! ( :-( )
Great fun to watch though.
DC in primary leads to ....

You COULD try a resistor (seriously) (although the results would be 
poorish) or a capacitor (could be interesting) but I'd return them and 
ask for something that worked as intended. If time to make prototype 
is sof the essence trunk in ac from externally for now while parts are 
coming.

Jaycar have these

        http://www1.jaycar.co.nz/productView.asp?ID=MM2017&CATID=&keywords=transformer&SPECIAL=&form=KEYWORD&ProdCodeOnly=&Keyword1=&Keyword2=&pageNumber=&priceMin=&priceMax=&SUBCATID=

Small enough for your application? (maybe not)
1.35 VA !


        RM 

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