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Author Topic: 20M Class E  (Read 1482 times)
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vk3alk
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« on: March 20, 2024, 01:17:39 AM »

Have been playing around with this project using Nigels circuit as a guide and it really has been quite successful......
Have uploaded 2 photos.....
The efficiency is mid 90s .... a little unbelievable to say the least...
Have made the load around 8R and using my test Power Supply that can only supply about 5 amps the output is 173 watts going by my CRO at the dummy load which is getting very warm.....

Are going to order some more FETs and makeup a smaller module using CMCD.....
My aim is to hopefully have 2 small modules with good efficiency into a combiner producing a total of around 150 watts....

Wayne



* 20M Class E waveform.jpg (87.06 KB, 640x480 - viewed 52 times.)

* 20M Class E.jpg (137.13 KB, 640x480 - viewed 87 times.)
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KD6VXI
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Making AM GREAT Again!


« Reply #1 on: March 20, 2024, 06:17:37 AM »

Awesome news!

Good to see the higher frequencies being explored.

I miss building.  Hoping to buy a house in the next couple months and get started again.  Idle hands and all.....


--Shane
WP2ASS / ex KD6VXI
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vk3alk
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« Reply #2 on: March 20, 2024, 06:12:27 PM »

Hi Shane...

Thanks for your remarks....
Not that I'm spying on you but you live in an interesting place  Grin
Right next to Cuba and the Bermuda Triangle  Roll Eyes

Do you go swimming down at the beach ?
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KD6VXI
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Making AM GREAT Again!


« Reply #3 on: March 20, 2024, 06:49:34 PM »

Swimming, diving (snorkel and scuba).

Love the water, it was a major factor in moving here.

Hurricanes are a downside but having moved from California where you never know if you where going to have an earthquake and fall intk the ocean or a wildfire burn your house down, this is manageable!

--Shane
WP2ASS / ex KD6VXI
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vk3alk
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« Reply #4 on: March 20, 2024, 09:27:11 PM »

Hmmm yeah....
California does have shocking fires .....
We get quite a bit of news of those fires and makes me wonder if there is any bush left....
Fires over here are definitely ferocious too but those around Californa seems to top the list which is not something you want....
I dont really want to think about that super valcano as I suppose it is what it is ..... so to speak....

Have fun swimming  Grin


Wayne
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