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Curious about what the \\u201c10 MHz\\u201d connector on the back of your test equipment is? \\xa0Interested in calibrating an SDR to reduce tuning error? \\xa0Do you want an accurate frequency source for tuning radios? \\xa0How about a super accurate sense of what time it is? \\xa0This week, Dr. Frank Howell K4FMH joins Jeremy and George to talk about GPS Disciplined Oscillators and Frequency References for your workbench.

News

• Hurricane Watch Net - https://www.hwn.org/
• Icom IC-9700 - http://qrznow.com/icom-ic-9700-vhfuhf1-2ghz-prototype-transceiver-shown-at-tokyo-hamfair-2017/
• Circuit Board Printer - Voltera - https://www.voltera.io/
• Circuit Board Printer - BotFactory - https://www.botfactory.co/page/homepage

Workbench

KF7IJZ\\u2019s Workbench

• Remote Airspy Server w/ ASUS Tinkerboard
• • Airspy SDR Receivers
  • • Airspy R2 - 24Mhz - 1.8Ghz 10Mhz Bandwidth SDR Receiver - $169 - https://v3.airspy.us/product/a-airspy/
    • Airspy Mini - 24Mhz - 1.8Ghz 6Mhz Bandwidth SDR Receiver - $99 - https://v3.airspy.us/product/a-airspy-mini/
    • SpyVerter HF Converter - $49 - https://v3.airspy.us/product/a-spyverter/
  • ASUS Tinkerboard
  • • I Used a Tinkerboard because I had one, but I would recommend an ODroid device instead - http://www.hardkernel.com/main/main.php
    • Tinkerboard Hardware - https://www.asus.com/us/Single-Board-Computer/Tinker-Board/
    • Tinkboard Linaro Linux Distro available on that page under Downloads
    • Armbian Distro for Tinkerboard - https://www.armbian.com/tinkerboard/
    • Good review of Tinkerboard - https://forum.armbian.com/index.php?/topic/4614-asus-tinker-board/
  • Software
  • • Spyserver for ARM 32 Bit - http://airspy.com/download/
    • Airspy on ARM Instructions (do this first) - http://photobyte.org/running-spyserver-raspberry-pi-3/
• Arduino MIDI Mute Button
• • Hardware
  • • Adafruit Pro Trinket 5V - https://www.adafruit.com/product/2000
    • Adafruit 24mm LED Arcade Buttons - https://www.adafruit.com/product/3430
    • Adafruit MIDI Jack - https://www.adafruit.com/product/1134
  • Arduino MIDI Wirting and Communication Guide - https://www.arduino.cc/en/Tutorial/Midi
  • Use \\u201cDebounce\\u201d Example code from Arduino IDE
  • Arduino MIDI Message Guide (code is deprecated, but message formats are relevant)- http://little-scale.blogspot.com/2011/08/simple-examples-of-sending-midi-data.html
  • Eagle Best Practices
  • • 1/16\\u201d Margin around the edge of the board
    • Avoid acute angles on circuit traces
    • Vias should be at least 0.04\\u201d in size
    • Traces should be at least 0.03\\u201d in size
    • Keep good space between signal lines and ground planes/traces
• Other Links
• • Perseus SDR - http://microtelecom.it/perseus/
  • SDR Console Software - http://sdr-radio.com/Software/Download1/Download
  • RF Space - http://rfspace.com/RFSPACE/Home.html
  • Cloud SDR - http://www.cloud-sdr.com/
  • SDR# Tuner from Mouse - https://www.rtl-sdr.com/building-a-tuning-knob-for-sdr/

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KJ6VU\\u2019s Workbench

• RIDGID Toolbox for KX3 Project - http://www.homedepot.com/p/RIDGID-22-in-Pro-Organizer-Black-222571/205440492
• BBC Micro:Bit - http://microbit.org/

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K4FMH\\u2019s Workbench

• Trimble based GPS GPSDO 10Mhz / 1PPS Clock - http://www.ebay.com/itm/Trimble-GPS-Receiver-GPSDO-10MHz-1PPS-GPS-Disciplined-Clock-sine-and-square-wave-/252162780444?hash=item3ab612ad1c:g:o2IAAOSw1WJZHdMY
• PCTEL GPS (L1) 26dB Timing Antenna Kit - http://www.ebay.com/itm/PCTEL-GPS-L1-26dB-TIMING-ANTENNA-KIT-GPS-TMG-26N-W-Mount-Kit-/263159662203?epid=1209248913&hash=item3d4589c67b:g:KU0AAOSw8gVX3BPx
• Six Output Video Distribution Amplifier - Sigma Electronics VDA-100A - https://www.ebay.com/sch/i.html?_odkw=SIX+Output+Video+Distribution+Amplifier+Sigma+Electronics+VDA-100A&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.XSigma+Electronics+VDA-100A.TRS0&_nkw=Sigma+Electronics+VDA-100A&_sacat=0
• Leo Bodnar Precision 2 Output GPSDO (450Hz - 800Mhz) - https://v3.airspy.us/product/lb-gpsdo-1/
• HP 3586A Selective Level Meter - http://ve2zaz.net/HP3586_AD5962/HP3586_AD5962.htm

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Show Links

• K4FMH\\u2019s Blog - http://k4fmh.com
• WWV - https://www.nist.gov/pml/time-and-frequency-division/radio-stations/wwv
• EEVBlog Frequency Reference Videos
• • Rubidium - https://www.youtube.com/watch?v=zPPB7ZzO_TA
  • Cesium - https://www.youtube.com/watch?v=3yTL06ZU5SU
• Lady Heather Disciplined Oscilator Control Program - http://www.ke5fx.com/heather/readme.htm
• U-Blox GPS Receivers and Timing Devices - https://www.u-blox.com/en
• Gerry Sweeny on YouTube - https://www.youtube.com/user/gezzasw
• WGUR \\u201cThe Noise\\u201d - http://www.gcsuradio.com/
• K4FMH on Linux in the Ham Shack - http://lhspodcast.info/2015/10/lhs-episode-155-interview-with-frank-howell/
• K4FMH on Twitter - https://twitter.com/frankmhowell

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