Difference between revisions of "Current Projects"
From Note to self
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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. | 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. | ||
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| + | = VNA fast detector board = | ||
| + | Plan: to redraw the fast detector board with kicad, and order PCB's with OSHPark. | ||
= AD9850 DDS VFO = | = AD9850 DDS VFO = | ||
STATUS: writing software. | STATUS: writing software. | ||
Revision as of 18:09, 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.
VNA fast detector board
Plan: to redraw the fast detector board with kicad, and order PCB's with OSHPark.
AD9850 DDS VFO
STATUS: writing software.
