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Postby N1ESE » Tue Nov 20, 2007 3:22 pm

Alright, all fixed. Here's a new pic before I try and fire it up, look ok now?

http://n1ese.qrpradio.com/Class-E/caps-wired-2.jpg

- JT
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Postby kf1z » Tue Nov 20, 2007 3:29 pm

N1ESE wrote:Alright, all fixed. Here's a new pic before I try and fire it up, look ok now?

http://n1ese.qrpradio.com/Class-E/caps-wired-2.jpg

- JT


Yeah, that looks dandy.....

Start out with low voltage, 10 or so, and see what happens....
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Postby N1ESE » Tue Nov 20, 2007 3:38 pm

10.75VAC in, 12.35VDC rectified

I think we are making progress now.

- JT
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Postby N1ESE » Tue Nov 20, 2007 3:47 pm

50VAC, 65VDC

Should I leave it here for a bit and see if it holds the voltage?

- JT
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Postby kf1z » Tue Nov 20, 2007 4:01 pm

N1ESE wrote:50VAC, 65VDC

Should I leave it here for a bit and see if it holds the voltage?

- JT


As long as the voltage stays steady...and nothing is burning up,, you should be all set......

try 100vac in, and see what you get....

about 133vdc?
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Postby N1ESE » Tue Nov 20, 2007 4:12 pm

kf1z wrote:As long as the voltage stays steady...and nothing is burning up,, you should be all set......

Was steady at 65VDC for 6 minutes. Bumped up the mains to 99VAC and now have 128VDC. No smoke, no burning smell.

- JT
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Postby kf1z » Tue Nov 20, 2007 4:19 pm

N1ESE wrote:
kf1z wrote:As long as the voltage stays steady...and nothing is burning up,, you should be all set......

Was steady at 65VDC for 6 minutes. Bumped up the mains to 99VAC and now have 128VDC. No smoke, no burning smell.

- JT



cool....

that's about where you'll need to run it....
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Postby N1ESE » Tue Nov 20, 2007 4:30 pm

Tweaked it to 100VAC according to my DMM and I am at 130VDC so life is now good.

Here's an top view of the chassis. Plenty of room on the right for the PWM. Low voltage transformers will be mounted in the front left.

http://n1ese.qrpradio.com/Class-E/HV-Supply.jpg

HV Isolation transformer is remotely mounted. I have a terminal strip on the back of the chassis for the primaries and secondaries. The chassis is an old UPS rack mount that I gutted and put a new aluminum panel on the front.

Thanks man for all your help debugging this.

- JT
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