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Author Topic: want to attempt some powerjack mods and could use some help. oztules?  (Read 10306 times)

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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #30 on: March 27, 2016, 06:06:29 pm »
would that be for a single core? if so when I use 3 of them do I just divide those numbers by 3?
thanks for the help.

Cheers,
          Sam
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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #31 on: March 29, 2016, 11:41:32 pm »
i should be ready to start winding the triple stack transformer tonight. just a quick question. does 67 turns sound correct for the secondary?

Cheers,
            Sam
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Offline oztules

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #32 on: March 30, 2016, 01:43:33 am »
yes, but I would do 70 to give some clearance from saturation... less idle current. ( thats for 3 cores @3.6v/turn )

...........oztules
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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #33 on: March 30, 2016, 02:10:22 am »
beautiful. thanks for that. I glassed the cores together this morning and god damn it's a heavy mother now.

Cheers,
           sam
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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #34 on: April 02, 2016, 11:44:18 pm »
the core are glassed together, a couple of layers of mylar down, the first layer of the secondary down a layer of resin and more mylar going to do another layer of the 2mm secondary today. man it is hell on your whole upper body, it doesn't help when the core alone weighs in at just on 35kg.   
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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #35 on: April 02, 2016, 11:46:09 pm »
i have a fair few pics that i would like to add but it won't let me, i have tried with 2 browsers and i get the same resault. it uploads them and then says the page can't be contacted. is it just me? i have been trying for a few days
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Offline oztules

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #36 on: April 03, 2016, 12:31:36 am »
" man it is hell on your whole upper body"... aint that the truth!

Pics seem to work ok for me
Browse for file and then pick your "inline fullsize image" etc

Check your file type is site friendly.... ie .png .jpg etc.... and your size is in limits

.............oztules
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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #37 on: April 03, 2016, 03:22:30 am »
some pics of the process so far.
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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #38 on: April 03, 2016, 03:24:00 am »
got the pics sorted, i had turned up the quality on my camera and forgot. so the pictures were too big.
all sorted now.

Cheers,
            Sam
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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #39 on: April 03, 2016, 03:27:34 am »
a quick note on the recycled copper. i did some of it with the 3 bearing straightener and the rest with my hyper extreme ute straightening process ::).
and the stuff i pulled with the ute is waaayyy softer than the other stuff. just thought it may be of interest.

Cheers,
            Sam   
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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #40 on: April 03, 2016, 03:45:33 am »
i did a test run on the inverter with the small transformer today, and it seemed to go ok. i havn't tried under load or anything as yet but i am happy with the idle current, it is 16.3w does that seem ok to you guys?. i still have a way to go but it is getting there. to start with i made a bit of a mistake and tried to power it from my two 24 volt battery chargers wired in series. that was a mistake, the voltage measured at 52v but when i switched it on it all seemed ok but then r2 (the one in the picture) started to smoke i looked at the meter quickly and shut it down, the meter was reading 72v :o. (wonder why it didn't shut down from over voltage?) i hooked it up to 4 old car batteries like i should have in the first place and i fired up fine. that resistor is running warm though is that normal?. the ecore is pretty noisy but i haven't glued it yet and the transformer is making a bit of noise but i am guessing that is because it isn't epoxied, i just stripped the primary off and added 20 turns to the seccondary?

thanks for all the help it sure is good when it all starts coming together ;D

Cheers,
           Sam
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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #41 on: April 03, 2016, 03:48:09 am »
one last question for now, haha
how many layers would you recommend on the secondary of this big trans i am making?
and what size primary?
i would like to make it as solid as practical


Cheers,
            Sam
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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #42 on: April 03, 2016, 05:33:46 pm »
another thing is, I have read about bypassing current around the ct in many of your posts, but i can't find how you actually did it.
would you be able to shine some light on it for me please?

thanks,
           Sam
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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #43 on: April 04, 2016, 05:11:07 am »
just thought i should add that the wire i am using on the secondary is just over 1.8mm in diameter,
which according to the online calculators is 2.6mm squared


Cheers,
            Sam
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Offline Dr_Zogg

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Re: want to attempt some powerjack mods and could use some help. oztules?
« Reply #44 on: April 05, 2016, 04:40:36 am »
another layer down and epoxied. that's 3 hmm where to stop?  ???
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