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  #1  
Old 03-04-2009, 09:01 AM
k9yli k9yli is offline
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Smile build it

I just finished my third copy of the ARRL HANDBOOK 28 volt power supply,
modified to 13.8 volts.
I started with a 44volt 16 amp transformer purched for $5 at a , you got it,
a farm show flea market..
Using a digital volt meter and a sharp tool I found the exact center of the output winding within a few hundredths of a volt.
I cut the winding with a dremel tool and added two wires to parallel the windings , making a 22 volt 32 amp winding.
Built the whole thing in a cabinet from a TV sweep generator.
I used a different output transistor than the 3055s called for.
I used a 30 amp version.
With the sheetmetal work etc, I have abut 40 hours in it.

Get out there and build.!!!!!!!

I have ictures but can't figure out how to insert them. right clik image doesnt work

Last edited by k9yli : 03-06-2009 at 12:19 PM. Reason: pictures
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  #2  
Old 03-04-2009, 04:04 PM
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KI4RVH KI4RVH is offline
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K9yli,

I moved this over here in Home Brew so it would get more attention. I left a redirect in radio. Good job on the Power Supply. Post us some pics if you can.

73

Chris
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  #3  
Old 03-07-2009, 07:37 PM
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mustang66 mustang66 is offline
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K9yli,
Good job on the supply.

To post the pic you will need to shrink it in size. The web host will not accept large files.

Click, manage attachments>browes>upload>close window.

That should do it.

I will try a test file.
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  #4  
Old 03-08-2009, 09:17 AM
k9yli k9yli is offline
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Default pictures power supply

i'll try this.. first version
it worked. transformer was too tall for original case.
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  #5  
Old 03-08-2009, 09:19 AM
k9yli k9yli is offline
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Default power supply

second version.
built in surplus rack mount.
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  #6  
Old 03-08-2009, 09:29 AM
k9yli k9yli is offline
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Default power supply

try again. internet problem
third version..
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  #7  
Old 03-08-2009, 09:36 AM
k9yli k9yli is offline
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Default power supply

the third innards. not complete here .
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  #8  
Old 12-02-2009, 04:03 PM
LoraHup LoraHup is offline
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Default build

AH this build is killing me. i was expecting something not as bad. i just got this kit a couple of days ago and am having a killer time attaching the lower piece to the upper piece. also must everything that says "put locktight" have to have it? im guessing it would be a good idea...? Just let me know. Cheers,Vanka
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  #9  
Old 01-04-2010, 09:52 AM
k9yli k9yli is offline
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don't have loctight???

just use a little finger nail polish....

or some silicone sealer,/ tub and tile sealer..

moist any glue.
just a dab as you may want to remove it some time.

red bottle locktite,, stays some what soft so easy to remove but wont vibrate loose.
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