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LAN_403

HV Enthusiast

Sat Jan 26 2008, 09:16PM

Registered Member #15 Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068

Austin wrote ...

I think I might, I just hope its long enough. did you use the same gauge wire for all 3 wire?

I believe i used 26AWG wire for my transformers. First I took all three wire (colored coded for easy identification), and then used a drill to twist the wires together. Then just wrapped say the 20 turns I needed. On the primary side where I needed 1/2 the number of turns on the secondary, I simply pulled an extra loop out at the 10th turn and continued winding all three wires the final 10 turns. Then i cut that pulled out loop, so now the primary wire is two separate equal length wires and wired that in parallel giving me 10 turns. (Just be sure phasing is correct)

Austin

Sun Jan 27 2008, 12:53AM

Registered Member #1169 Joined: Wed Dec 12 2007, 09:16AM
Location: Portland OR
Posts: 251

Below are some images of the parts not included on the board but listed on the schematic. Please let me know if messed any of these up.

This is an image of C81,C83

This is an image of C32 (I soldered this cap between R25 and the ground for r28 <---- remember this is open/unused)

This is an image of C86 soldered in parallel with C85

Wirenut

Sun Jan 27 2008, 01:14AM

Registered Member #141 Joined: Sat Feb 11 2006, 01:14PM
Location: Southern California
Posts: 96

This is an image of my completed transformer. i twisted and wrapped the blue and white wire 20 times around the ferrite and the yellow wire on top 10 times around the ferrite

Sorry, but this is wrong. You have one wire going between s2 and s1 and the other wire between g1/g2. Take another look at my post above with the pic of the gdt.

*edit
hrm, the text I quoted seems to have been edited out.

Austin

Sun Jan 27 2008, 01:17AM

Registered Member #1169 Joined: Wed Dec 12 2007, 09:16AM
Location: Portland OR
Posts: 251

Wirenut wrote ...

This is an image of my completed transformer. i twisted and wrapped the blue and white wire 20 times around the ferrite and the yellow wire on top 10 times around the ferrite

I know i realized this was wrong right as I was posting... I removed it thats probably why you were unable to quote. how about the other images tho?

Wirenut

Sun Jan 27 2008, 01:30AM

Registered Member #141 Joined: Sat Feb 11 2006, 01:14PM
Location: Southern California
Posts: 96

how about the other images tho?

C86 and C32 appear to be in accordance with the schematic. The first pic is confusing to me. There is a spot for C82 on the board so are those caps C81 and C83?

Austin

Sun Jan 27 2008, 02:04AM

Registered Member #1169 Joined: Wed Dec 12 2007, 09:16AM
Location: Portland OR
Posts: 251

yes, my mistake its C81, C83. I will edit the previous post.

Do those look correct as well? if so then my resonant board is completly done.

Wirenut

Sun Jan 27 2008, 02:17AM

Registered Member #141 Joined: Sat Feb 11 2006, 01:14PM
Location: Southern California
Posts: 96

Do those look correct as well?

Provided that they're the correct values, looks good.

if so then my resonant board is completly done.

Cool, but if you hook everything up and it doesn't work, you may want to insert the ICs into the sockets as well.

Austin

Sun Jan 27 2008, 02:48AM

Registered Member #1169 Joined: Wed Dec 12 2007, 09:16AM
Location: Portland OR
Posts: 251

obviously, I just left those out for now so they don't get ruined... I don't know how delicate they are.

I'm really excited the half bridge is done, along with everything else. Its now time to start working on the primary (shipment comes in Monday) so I can start hooking everything up! Wire and eastern you both have been a huge help. I'll continue to keep you up to date, I'm sure I will have more questions.

Thanks again

Austin

Sun Jan 27 2008, 02:53AM

Registered Member #1169 Joined: Wed Dec 12 2007, 09:16AM
Location: Portland OR
Posts: 251

Speaking of questions, (I'm not sure that i need to know this now but what the hell) how did you go about tuning the potentiometers. Ie R23, R83, R30. Actually a better question is how do I tune them... I read the descriptions in the bottom of the pages but they are kinda veg. I think thats how you spell veg....

Wirenut

Sun Jan 27 2008, 03:23AM

Registered Member #141 Joined: Sat Feb 11 2006, 01:14PM
Location: Southern California
Posts: 96

I'm really excited the half bridge is done

I noticed in your (briefly) posted pic of your bridge, you were missing cr101&102.

how did you go about tuning the potentiometers

This is covered in the back of the book, but it took me some fiddling with to get right. I can help when you get there.

I think thats how you spell veg....

*Vague*

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