Difference between revisions of "Current Projects"
From Note to self
(→reconstruction filter and amplifier for AD9951 DDS) |
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* Need to caracterize the filter and test the MMIC amplifier. | * Need to caracterize the filter and test the MMIC amplifier. | ||
| − | Tested at RCL. | + | Tested at RCL. Filter is ok. Amplifier oscillates. |
| − | 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 = | = AD9850 DDS VFO = | ||
STATUS: writing software. | STATUS: writing software. | ||
Revision as of 18:06, 28 March 2014
Contents
Belthorn XTal Filter
STATUS: stuck
- 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.
