Difference between revisions of "Current Projects"
From Note to self
(→reconstruction filter and amplifier for AD9951 DDS) |
(→Belthorn XTal Filter) |
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= Belthorn XTal Filter = | = Belthorn XTal Filter = | ||
− | STATUS: | + | STATUS: testing |
* Ceramic caps didn't work very well: | * Ceramic caps didn't work very well: |
Revision as of 18:07, 28 March 2014
Contents
Belthorn XTal Filter
STATUS: testing
- Ceramic caps didn't work very well:
- Low Q factor
- high tolerances
- Refitting with styroflex caps, but I'm missing some values.
2014-03-27: Built new filter, works ok (Currently testing with VNA)
Bridge for N2PK VNA
STATUS: DONE!
reconstruction filter and amplifier for AD9951 DDS
STATUS: ready for testing
- Need to caracterize the filter and test the MMIC amplifier.
Tested at RCL. Filter is ok. Amplifier oscillates.
2014-03-28: Refitted the MAR-8 bias resistor with 100 Ohm (was 10 Ohm, oops). Also installed the 3dB attenuator at the MAR-8 input. Should operate at somewhere 7-8V now.
AD9850 DDS VFO
STATUS: writing software.