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Messages - Transmitter Man

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The RF Workbench / Re: Beginner class D design
« on: April 15, 2019, 1605 UTC »
OV,

I missed the fact the previous board only works up to 5Mhz as I would much prefer the higher frequency board :-(

I will wait :-)

Transmitter Man

2
The RF Workbench / Re: Beginner class D design
« on: April 13, 2019, 1332 UTC »
OV,

Here is Nigel's (VE3ELQ) response to my question re driver chips;

"The best RF deck FET drivers I have tried by a wide margin are the NCP81074A.  With a Tr/Tf of 4 ns, matched delays, and 10A of source/sink they are both super fast and capable of driving higher gate C FETs. No problem with the 150pf SIC FETs at 7.3 mhz or the newer GaN FETs.  They are inexpensive and small so I recommend 1 driver per FET up nice and close to keep the gate lead as short as practicable. They work great.

https://www.onsemi.com/pub/Collateral/NCP81074-D.PDF"

Do you have any spare boards to sell although I believe you'll need to re-do them should you decide to use the above drivers. So cheap now I'd gladly contribute to any updated board.

I do like the look of your 8 device boards.

Transmitter Man


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