RE: [TCML] HV Transformer Winding

["Phil Tuck" <follies@xxxxxxxxxxxx>]

Hello.
I am just off to the workshop now try a temporary coil. I may have enough
small gauge scrap to wind a very low-voltage primary though, that would not
need many turns and that could be done by hand.
The reason for not doing this originally is that the lathe (my winding
machine) is all setup for the next secondary, and I don't really want to
break it all down to wind the new primary and then have to set it all up
again for the other secondary. The lathe setup is far from straightforward
as I didn't have sufficient centre height as standard. You can see the setup
I'm using here
http://homepage.ntlworld.com/follies/tesla/tesla%20hv%20rewind.jpg   (One
chuck is driving another chuck mounted above the bed) 

"Necessity is the mother of invention" as they say


Regards

Phil
www.follytowers.co.uk/tesla

Regards

Phil
www.follytowers.co.uk/tesla

     




-----Original Message-----
From: Jim Mora [mailto:wavetuner@xxxxxxxxx] 
Sent: 24 April 2009 04:09
To: 'Tesla Coil Mailing List'
Subject: RE: [TCML] HV Transformer Winding

Hi Bart,
Flipping a coil bobbin does not change its winding direction (counter
intuitive). Test it with a spring of scrap piece of wire. Aren't neon
transformers wound in opposite directions (similar core scenario)?
Jim Mora

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of bartb
Sent: Thursday, April 23, 2009 5:38 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] HV Transformer Winding

Phil,

I'm in the same boat as Finn here. I'm thinking the windings are wound 
in opposite directions myself, but I'm not certain. I expected that you 
would be winding the secondary coils on individual bobbins at first and 
simply sliding them onto the core (in which case you could just test it 
flipping one of the bobbins). But are you winding the secondary coils on 
the core itself? If so, then Finn's suggestion is certainly the test to 
perform.

Take care,
Bart

Finn Hammer wrote:
> Phil Tuck skrev:
>> I have posted this on the 4hv.org forum, but as I started the project on
>> here I will include it on here as well.
>>
>>  
>>
>>   
> Phil,
>
> I have been thinking long and hard, but everytime I am close to a 
> conclusion, my head starts to explode, and I have to start over.
> So I will advice you to do what I would do myself:
>
> Energize the primary, and make a couple of nice test windings with 
> some of the scrap insulated wire you have stashed away for this purpose.
> You only need some 5-10 turns to settle the matter, really.
>
> Hope this helps,
> Cheers, Finn Hammer
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
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