Author Archives: glenenglish

About glenenglish

electronics, bikes, mountains, propagation, RF systems, modems,

New AnyLocker- radio reference locking board

Project sources, schematics (in PDF also), and a readme https://github.com/glenenglishgithub/Locker-4 Recent changes : Added LVDS diff receivers for better performance and more sensitivity at low frequencies. Modified input amplifier to have better midband gain. change to 2 layer PCB, 0603 … Continue reading

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New digipeater for Mt Ginini VK1RGI

The performance of the VK1RGI packet digi on 145.175 MHz was clearly degraded on its best, or capability, and so it has been replaced.. The original install was a 1990s TNC2 and a FM-828 PMR radio.  FM828s make good split … Continue reading

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RF check of QYT KT-8900R Chinese origin Dual bander S/N 1608181253

A friend gave me this radio to evaluate just how clean or dirty this low cost ($100) 146 / 440 MHz 25W mobile dual bander might be. The answer is pretty bad. It has a similar in-sub band spur output … Continue reading

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Ryzen7 and Xilinx Vivado and B350+

I’m putting a Ryzen system together for evaluating the AMD work. It’s important to support the Intel competition. My system is a 1700  on a B350+ Asus , 128GB M2 SSD, 4 xGB DIMMs 2400. 8GB? this is a cheap … Continue reading

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Paste jetter – inkjet lessons

I ordered my Piezo actuator today. My Piezo actuators came from  http://www.piezodrive.com/    I got a -30>>150V actuator type SA050520.  Have been learning about making small features, including  EDM The block that houses the delivery chamber will be temperature controlled I’ve done alot of … Continue reading

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random thoughts toward a successful paste dispenser.

These are RANDOM thoughts out loud, right now….there are a few things that need to be done to make the paste dispenser work, I have studied the various syringe/ auger constructions, their claims over others etc etc extensively. rough drawing…… … Continue reading

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Guides arrived…

From “Jiean Robot” in Zhejiang, China. “Zhejiang Sikete Technology co ltd” Very easy to deal with Chinese company, good customer service, understood my needs, able to customize, and 7 day delivery once TT received. Well priced also, about USD400 each … Continue reading

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