Location of filliment transformer issue.
Kolas, Sat Aug 12 2006, 11:35PMHi there guys.
I have a question, which is mainly directed at terry but other input is apreciated.
Attached are 3 photos of my VTTC setup
every thing in the picture is where it will stay... (tentivly)
My question: Will the placement of this large iron core cause serious-slight power draw from my tank and secodnary circuits?
For refrence the filliment transformer is 9"x6.5"x11".
And it's 11 inches away from the secodnary.
Thanks for the Input
Kolas
PS: does the rest of the setup look
--------------------------
errr pictures :D
[mod edit] fixed double post
Re: Location of filliment transformer issue.
Marko, Sun Aug 13 2006, 12:19AM
Holy cr@** it lives!
Transformer near base like that is probably OK (just take care not to have rings or metal plates around/under the primary and etc.
What is the supporting table made from? Is it completely steel, painted wood/plastic?
And I definitely like the secondary former..
Marko, Sun Aug 13 2006, 12:19AM
Holy cr@** it lives!
Transformer near base like that is probably OK (just take care not to have rings or metal plates around/under the primary and etc.
What is the supporting table made from? Is it completely steel, painted wood/plastic?
And I definitely like the secondary former..
Re: Location of filliment transformer issue.
Terry Fritz, Sun Aug 13 2006, 01:53AM
Hi,
I think it wil be ok. The transformer core laminations are at 90 degrees to the voltage field so that will do a lot right there. I would try to keep it as far away as practical without too much worry.
I simple test is to test the primary circuit tuning point with and without the transformer in place. But I doubt you will see much shift at all.
That's going to be a BIG tube coil!!
Cheers,
Terry
Terry Fritz, Sun Aug 13 2006, 01:53AM
Hi,
I think it wil be ok. The transformer core laminations are at 90 degrees to the voltage field so that will do a lot right there. I would try to keep it as far away as practical without too much worry.
I simple test is to test the primary circuit tuning point with and without the transformer in place. But I doubt you will see much shift at all.
That's going to be a BIG tube coil!!
Cheers,
Terry
Re: Location of filliment transformer issue.
Kolas, Sun Aug 13 2006, 04:05AM
haha thanks guys i can rig up a half bridge and test the primary (yet to be built :D)
the supporting cart is made of HDPE
Kolas
Kolas, Sun Aug 13 2006, 04:05AM
haha thanks guys i can rig up a half bridge and test the primary (yet to be built :D)
the supporting cart is made of HDPE
Kolas
Re: Location of filliment transformer issue.
Marko, Sun Aug 13 2006, 11:46AM
Transformer is definitely nothing to worry and I don't thing difference with and without it would be measurable.
Marko, Sun Aug 13 2006, 11:46AM
Transformer is definitely nothing to worry and I don't thing difference with and without it would be measurable.
Re: Location of filliment transformer issue.
robert, Sun Aug 13 2006, 01:18PM
But be sure to ground the transformer core.
Otherwise you can easily burn the winding isolation and destroy that transformer and replacing this one is hard for sure.
If theres any chance of a spark hitting the transformer or its related wires, put a shield of grounded wire screen around it.
robert, Sun Aug 13 2006, 01:18PM
But be sure to ground the transformer core.
Otherwise you can easily burn the winding isolation and destroy that transformer and replacing this one is hard for sure.
If theres any chance of a spark hitting the transformer or its related wires, put a shield of grounded wire screen around it.
Re: Location of filliment transformer issue.
Marko, Sun Aug 13 2006, 01:32PM
Just for curiosity, what wire thickness do youplan using on that secondary?
Maybe you could go for a thicker wire to increase Q as posible, and use bigger topload..?
That tube can safely go up to 40Mhz
Marko, Sun Aug 13 2006, 01:32PM
Just for curiosity, what wire thickness do youplan using on that secondary?
Maybe you could go for a thicker wire to increase Q as posible, and use bigger topload..?
That tube can safely go up to 40Mhz
Re: Location of filliment transformer issue.
Kolas, Sun Aug 13 2006, 04:19PM
haha yeah firkraqq it CAN go to 40mhz, but there is no way i can make a sizable secondary that can, unless a wire would work
right now im looking at using 18awg wire, for a resoant frequency of 80khz O_O
sad i know
what do you guys predict the output will look like?
Kolas
Kolas, Sun Aug 13 2006, 04:19PM
haha yeah firkraqq it CAN go to 40mhz, but there is no way i can make a sizable secondary that can, unless a wire would work
right now im looking at using 18awg wire, for a resoant frequency of 80khz O_O
sad i know
what do you guys predict the output will look like?
Kolas
Re: Location of filliment transformer issue.
Marko, Sun Aug 13 2006, 04:32PM
Maybe bifilar or trifilar winding ala blackplasma could help there
(altough I admit it's tricky to wind)
The point would be to increase unloaded Q as much as possible and put a big toroid onto the coil, making it break out from it without b. point for some long streamers.
I like this with SSTC's bt I think it's best that some real VTTCoilers help you there...
Marko, Sun Aug 13 2006, 04:32PM
Maybe bifilar or trifilar winding ala blackplasma could help there
(altough I admit it's tricky to wind)
The point would be to increase unloaded Q as much as possible and put a big toroid onto the coil, making it break out from it without b. point for some long streamers.
I like this with SSTC's bt I think it's best that some real VTTCoilers help you there...
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