Difference between revisions of "Filter Modulator ver2"
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[[File:F-M V2.jpg|400px]] | [[File:F-M V2.jpg|400px]] | ||
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The Version 2 the parts list and schematics are available for download: | The Version 2 the parts list and schematics are available for download: | ||
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*[[:Media:PdFM V2 Sht 3.pdf| Circuit schematic - part 3]] | *[[:Media:PdFM V2 Sht 3.pdf| Circuit schematic - part 3]] | ||
− | Although the board includes the options to fit a switching voltage regulator (an R78E5), the regulator introduces spurs at -50dB on the output spectrum , so is not the recommended option. | + | Although the board includes the options to fit a switching voltage regulator (an R78E5), the regulator introduces spurs at -50dB on the output spectrum , so is not the recommended option. |
+ | |||
+ | DO NOT FIT L10 or cut the track beneath it as it does not suppress the spurs and introduces voltage drop, which upsets the modulator balance. |
Revision as of 16:37, 22 March 2017
Board information - version 2
PCBs supplied after 28 February 2017 are Version 2 and include the modifications to improve spectral performance.
Temporary photo:
The Version 2 the parts list and schematics are available for download:
Although the board includes the options to fit a switching voltage regulator (an R78E5), the regulator introduces spurs at -50dB on the output spectrum , so is not the recommended option.
DO NOT FIT L10 or cut the track beneath it as it does not suppress the spurs and introduces voltage drop, which upsets the modulator balance.