2013-10-17 Next Project Ideas Foxhunt Offset Attenuator
The overall goal of the meeting is to present a variety of kit building ideas to the DARA Thursday Night Group and narrow down the selection of a kit or kits that the Group would like to build. Jeff Ullery, KD8SHF, and others presented a comprehensive list of kit building ideas to the DARA Thursday Night Group. The Group members reviewed and discussed the candidate kit building ideas. The members also suggested additional items that were added to the candidates list.
Candidates list:
$20 Antenna analyzer, 0-30 MHz: http://www.hamstack.com/project_antenna_analyzer.html
Poor Man's Antenna Analyzer: http://www.qsl.net/y/yo4hfu//Files/Ant_an/GM3VLB_Poor_Mans_Antenna_Analyser.pdf
Ham stack board: http://www.hamstack.com/hamstack.html
Sierra Radio Projects: http://www.hamstack.com/index.html
2M preamp: http://www.repeater-builder.com/projects/gaasfet.html
Vectronics (MFJ) has a lot of kits including preamps: http://www.vectronics.com/Categories.php?sec=209
Direct Digital Synthesizer (DDS): http://en.wikipedia.org/wiki/Direct_digital_synthesizer
N3ZI DDS-2 AD9834 30 MHz: http://www.pongrance.com/super-dds.html
DDS Buffer Amp: http://www.pongrance.com/dds-buffer.html
Radio Frequency Generator
Audio Frequency Function Generator
PigRig: http://www.kitsandparts.com/fprb-7030.7.php
SSB kit, the MKARS80 LSB 80M Transceiver Kit: http://www.radio-kits.co.uk/mkars80page.html
Field strength meter
Diode checker
Foxhunt Tape Measure Antenna: http://nt1k.com/blog/2012/vhf-3el-tape-measure-yagi/ http://theleggios.net/wb2hol/projects/rdf/snif_bm.htm http://theleggios.net/wb2hol/projects/rdf/tape_bm.htm https://sites.google.com/site/tapemeasureantenna/
Foxhunt Active Offset Attenuator using 9 volt battery: http://www.homingin.com/joek0ov/offatten.html http://nt1k.com/blog/2013/my-offset-attenuator-project/ http://www.utaharc.org/rptr/offset1.html http://www.qsl.net/nz0i/projects/attenuator/attenuator2.html http://www.mobilfuchsjagd.de/Technik/K8SB%20Active%20Attenuator.pdf
Foxhunt Active Offset Attenuator using 1.5 volt AAA cell: http://robin-wood.com/Ham/Fox/offset_atten.htm
Surface mount package soldering introduction
Group Decision
The DARA Thursday Night Group informally voted to build a Foxhunt Active Offset Attenuator. A parts list and estimated cost is included below.
Parts List and Estimated Cost (9 volt)
Hammond Flanged Aluminum Die Cast Box Drawing: http://www.hammondmfg.com/pdf/1590AFL.pdf
Fairchild LM7805CT Datasheet http://www.fairchildsemi.com/ds/LM/LM7805.pdf
Parts List and Estimated Cost (1.5 volt)
Hammond Flanged Aluminum Die Cast Box Drawing: http://www.hammondmfg.com/pdf/1590AFL.pdf
Dual N-Channel Zero Threshold™ EPAD® Precision Matched Pair MOSFET Array: http://www.aldinc.com/pdf/ALD110800.pdf