freedatasheets.com

chip-flip.com

CHIP-FLIP: links

http://www.chip-flip.com/useful-links

1 Copy the HTML code below and insert it anywhere in your website. 2 Please send then the URL to info(at)chip-flip.com. 3 Your link will be added to CHIP-FLIP after our review. Electronic and Electromechanical Components Distributor. The B2B Website for the Semiconductor - and Microelectronicindustry. World Leader for Frequency Control Solutions. World leader for crystal oscillator design, fox oscillator, ocxo oscillator, tcxo oscillators, fox xpresso. Satellite Phone Rental, Isatphone, and Globalstar.

bradthx.blogspot.com

playing with bits: APRS Station On a Boat - Part 1

http://bradthx.blogspot.com/2014/05/aprs-station-on-boat-part-1.html

Thoughts of a computer scientist focused on electronics. VHDL, RF, DSP, PIC, Digital, Analog, plus anything I find interesting at the moment. Wednesday, May 7, 2014. APRS Station On a Boat - Part 1. For the TNC I ultimately decided on the TNC-X. It is available in kit form, is inexpensive, supports the KISS protocol, has a USB interface, and has great reviews. I hadn't built a kit in probably 15 years, but I found this kit to be a simple build taking about an hour. For APRS software I chose Xastir.

bradthx.blogspot.com

playing with bits: November 2014

http://bradthx.blogspot.com/2014_11_01_archive.html

Thoughts of a computer scientist focused on electronics. VHDL, RF, DSP, PIC, Digital, Analog, plus anything I find interesting at the moment. Wednesday, November 12, 2014. 10GHz Transverter Design and Testing. Ham radio operation on 10GHz and above is one of the many things that finally persuaded me to get my ham license. I love RF design, specially in the microwave bands, so allowing me to do so and at the same time travel to hilltops to work line of sight contacts just sounded awesome. RF switching bet...

bradthx.blogspot.com

playing with bits: May 2015

http://bradthx.blogspot.com/2015_05_01_archive.html

Thoughts of a computer scientist focused on electronics. VHDL, RF, DSP, PIC, Digital, Analog, plus anything I find interesting at the moment. Monday, May 11, 2015. Tektronix 2246 Repair Part II. In the process of debugging the strange intermittent display issue on my Tektronix 2246 after re-capping the power supply. Output of mux on left, output after op amp on right. Saturday, May 9, 2015. Last year I had talked about how I accidentally destroyed my Tektronix 2246. I did ultimately find a donor board&#4...

bradthx.blogspot.com

playing with bits: Tektronix 2445B Capacitor Replacement

http://bradthx.blogspot.com/2014/01/tektronix-2445b-capacitor-replacement.html

Thoughts of a computer scientist focused on electronics. VHDL, RF, DSP, PIC, Digital, Analog, plus anything I find interesting at the moment. Monday, January 13, 2014. Tektronix 2445B Capacitor Replacement. Due to the fact that my Tektronix 2246 is currently out of commission. Tektronix 2445B Power Supply. Tek 2445B A5 Control PCB Caps. Ultimately I decided to replace every capacitor on the power supply boards and the four smd caps on the control pcb. I would leave the caps on the A1 main pcb alone f...

bradthx.blogspot.com

playing with bits: December 2014

http://bradthx.blogspot.com/2014_12_01_archive.html

Thoughts of a computer scientist focused on electronics. VHDL, RF, DSP, PIC, Digital, Analog, plus anything I find interesting at the moment. Friday, December 5, 2014. Stratum 1 Time Server Based on a Trimble Placer GPS 450 with PPS Output. Setting up GPS disciplined stratum-1 timeservers are not a new or technically difficult task, plenty of articles are already available including some excellent ones from David Taylor's satsignal.eu site. One note regarding serial to USB adapters. I was using one i...

bradthx.blogspot.com

playing with bits: June 2013

http://bradthx.blogspot.com/2013_06_01_archive.html

Thoughts of a computer scientist focused on electronics. VHDL, RF, DSP, PIC, Digital, Analog, plus anything I find interesting at the moment. Saturday, June 8, 2013. Analog Devices ADF4107 Based RF Frequency Synthesizer. I wanted the design to be flexible, that is with a single board I could populate it with a variety of VCOs only having to update the ADF4107 register configuration and the loop filter component values to produce a fixed or tunable frequency. My final design achieved this goal. To assist ...

bradthx.blogspot.com

playing with bits: April 2015

http://bradthx.blogspot.com/2015_04_01_archive.html

Thoughts of a computer scientist focused on electronics. VHDL, RF, DSP, PIC, Digital, Analog, plus anything I find interesting at the moment. Wednesday, April 1, 2015. Junk Hacking' is a term I like that is used to describe people finding exploits in these devices, it seems every week there is some new little embedded device that has a vulnerability. Stop. When these stories break, everyone always seems to be surprised that there is a backdoor or other exploit on IoT device N. Really? The wireless side o...

bradthx.blogspot.com

playing with bits: December 2013

http://bradthx.blogspot.com/2013_12_01_archive.html

Thoughts of a computer scientist focused on electronics. VHDL, RF, DSP, PIC, Digital, Analog, plus anything I find interesting at the moment. Tuesday, December 3, 2013. ADF4107 PLL Frequency Synthesizer Part II - 1.35Ghz LO for Radio Astronomy. 1 A new VCO had to be chosen, a Z-Comm V602ME15 was selected with a tunable range of 1100Mhz to 1400Mhz. 2 A new loop filter had to be calculated which ADIsim PLL was able to do for me. Several high frequency capacitors and thin-film resistors were used. 3 The PIC...