[linrad] Re: Fwd: [softrock40] Ver 7 28Mhz preamp? Yes

Hi all, the preamplifier at 28MHz is required when the VHF-SHF converter has a low gain and its output is designed for a higher gain IF like the one used in Linrad HDW or others. I would suggest to add the W7AAZ preamplifier using 4xJfet in parallel, as used in the CDG2000 and Pic-A-STAR. This

[linrad] Not Linrad - G3SBI H-Mode Mixer as tested by PA3AKE

Hi All, If you like to know more about D’MIXER that removed the mixer from the most critical stages in a receiver see what Martein Bakker, PA3AKE, has just published; a magnificent document regarding his evaluation of Colin Horrabin’s H mode mixer under various test conditions and using many

[linrad] Not Linrad - Better to use AD9912 and not AD9910

Hi all, following e-mail exchanges with my good friend Colin Horrabin, G3SBI, I came to know that one of his friends who heads the DDS development team for Analog Devices has told him that their lab tests have shown that the AD9912 has better spurious performance than the 9910 and as yet they

[linrad] NOT Linrad - AD9912 SFDR measurements

Hi all, following my message inserted on may 24th : “Better to use AD9912 and not AD9910”, I have received several enquiries about any test done on the AD9912. Yes, my good friend Giuliano, I0CG (of AD9951 DDS fame), is performing measurements on the AD9912 and also comparisons with his already