New 6 Watt Exciter

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nrgkits.nz
Neckmin
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New 6 Watt Exciter

Post by nrgkits.nz » Sat Oct 12, 2019 10:24 am

Here's the NRG Pro6, it delivers a variable 10mW to 6 Watts RF and is exceptionally clean! Phase noise is down around -115dBc/Hz at 10KHz offset, harmonics better than -60dBc.

I've designed this one to be as low cost as possible without compromising the spectral purity or modulation quality, so there's no non-essential components or features on this, since it is something you'll buy, install, and then later probably end up getting collected by the authorities or a rig thief.

This is just a prototype board, and I got the pinning mixed up for the output device so had to mount it on the other side of PCB, the two voltage regulators will also be replaced with TO220 types and designed to bolt down to the case, as they're drawing around 200mA each.

Cost on each one at this stage I expect to be less than £50 not including shipping.
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sinus trouble
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Re: New 6 Watt Exciter

Post by sinus trouble » Sat Oct 12, 2019 12:41 pm

Nice work once again G!! :)
I am as stupid as I look! :|

nrgkits.nz
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Re: New 6 Watt Exciter

Post by nrgkits.nz » Sun Oct 13, 2019 10:03 am

sinus trouble wrote:
Sat Oct 12, 2019 12:41 pm
Nice work once again G!! :)
Thanks, i've spent the best part of today tweaking it to get better efficiency and less power wasted through the regulators - its working really well now. I've got a PA controller board and SWR bridge on the way also.

This new exciter board is also absolutely quiet, there's no hint of any hum at all even with no shielding, and that's because the VCO is operating in the GHz with the output being divided down to VHF.

radium98
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Re: New 6 Watt Exciter

Post by radium98 » Mon Oct 14, 2019 9:09 am

PA controller board and SWR bridge on the way also.
good .waiting for

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