Why would you pull the power on a PI while a file is open on the uSD?? That's begging for issues. I also do not use the miniUSB for power, its injected (5V) at the GPIO pin area though a more secure c

Linux Desktop and laptop user since 2007. I run off the Debian tree usually Ubuntu, Mint or for the Rpi Rasbian. I will not tell anyone to switch, its their life and time. I jumped as my life and time

I have a few adapters for my headphones that is a simple LC low pass filter with a cutoff at about 4khz for that reason. The values vary as I use 16ohm (koss, Teac), and 600 ohm (David Clark) headphon

I use Linux and the usual way to program 328p is a uno and Arduino IDE. Just swap the Atmega in the nano for the target 328P and program it. It works as I usually use 328Ps with installed boot as they

#avr #firmware #eep #qcx

Comment: "On the DVM some of the zero volt pins give flat out 0.000v consistently (3,5,11, 7 on receive), 10 is 0.026v and 9 is inconsistent ranging from 0.005 to 0.039v. In transmit pis 12 and 13 rea

Congratulations Hans! Allison

I looked inside those .DAT files and its the kind of drog that winder email sometimes generates that incompatible with email in general. I didn't see spam or malware but it was poorly formed and large

On Fri, Oct 11, 2019 at 11:03 AM, Arv Evans wrote:1) DSB is easier to design and build, especially if it is a direct-conversion design. 1) There would be no IF and no BFO to cause birdies from unwante

Arvo, Pick any frequency and a plus and minus 1khz sidebands and you get the same. I used 7074 as a number.. However the guy at 7073 could be running CW there. That's the problem of wide signals. Alli

Arvo, With DSB a 1000hz tone on a 7075 carrier would put a tone at 7076 and also 7074... Of course you can shift the carrier to hit the watering hole but then 2000hz away your image is there serving s

However though the amp is good for 10W the QSX was not designed as a fixed power radio. You can dial it down. Allison

You need a 4 pin connector to bring the wires out for the ground and each paddle contact to 1/8th inch three circuit (stereo) a plug to match the QCX. That assumes you also have worked out the mechani

However if used with the QRPLabs linear you need TR switching and a PAD to get the power under 30 milliwatts. You might get enough if you eliminate the BS170s entirely. Last thing we need is more loud

Charging with panel could be done with a switch mode converter set to match the Voltage from the AC powered charger. Either way open circuit for solar panel is 22V and MPP is about 17-18V so a appropr

Steve, Its called reinventing the wheel, there are inexpensive products out there to do exactly what your trying to do. Have you ever heard of battery protection boards (BPB) and battery management bo

RC car batteries are fragile as they are pouch cells and they do not use or contain battery protection circuit. They are optimized for low weight at high power. Excellent batteries if care is taken to

Color is not significant to operation but helps with assembly. Generally the low pass filter color is a different quantity than the T1 wire. So the risk is running out of that color and wondering wher

I use a 3S lithium (11.8V) or 12V 7ah gelled lead acid. both are handy in my station. Power drain on RX is about 150 ma and TX maybe 400-500ma so most any battery wired for about 12V works including 8

The problem is typical of many forums. Everyone wants an ear to hear them and often the ear is deaf to the issues brought, usually because its not relevant or not going to change anything. Its neat th

I've used the very similar PIXIL Wideband loop for receiving on multiple radios (FT817, HRO50, ...) and it was a good way to go in areas where noise is high and space was limited. Compared to a full s