Re: FL2K replace MT34TL/AS11D buck chip with LDO

Thanks for the tip!

On Fri, Feb 8, 2019, 20:54 Sylvain Munaut 246tnt@gmail.com wrote:

Hi,

I have managed to replace both buck DC-DC converters with AMS1117 3.3 &

...

lm317 linear regulators and I successfully got rid of the mentioned 1 MHz buck converter clock to obtain as pure a signal as possible. Do not expect miracles as the DAC's are 8-bit and have a best case SNR of -48dB, but getting the sideband modulation out of the signal surely improves the resulting spectrum a lot.

Well they might be 8 bits, but they're massively oversampled for HF, so with good filtering and noise shaping, you can get more SNR.

Cheers,

Sylvain