Difference between revisions of "Filter Modulator ver2"
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===Board information - version 2=== | ===Board information - version 2=== | ||
− | PCBs supplied after 28 February 2017 are Version 2 and include the modifications to improve spectral | + | PCBs supplied after 28 February 2017 are Version 2 and include the modifications to improve spectral performance. |
+ | |||
+ | Temporary photo: | ||
[[File:F-M V2.jpg|400px]] | [[File:F-M V2.jpg|400px]] |
Revision as of 11:21, 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. Fitting L10 (after cutting the track beneath it) does not suppress the spurs and introduces voltage drop, which upsets the modulator balance.