VE3GAM online

Time 2021-01-09 12:05:46

Web Name: VE3GAM online

WebSite: http://ve3gam.webqth.com

ID:161564

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Donated an old laptop to the Steam Centre here in St Thomas today, and mentioned that I was interested in looking at a distribution called Ham Pi by W3DJS Dave Slotter for the Raspberry Pi. I knew that the Steam Centre had done some work with the Raspberry Pi, and I first saw this distro mentioned in one of the videos on youtube by Kevin Loughin Ham Radio HamPI, possibly the best general ham radio image for the raspberry pi.. When it was suggested that I could take one of the units home to play with, then I immediately accepted the offer. I was given a Raspberry Pi 3 model B, a display monitor, a mouse and keyboard. It was easy to set up and get running at home. Once that happened, I did have to get out to Walmart and pick up a 32 GB SD micro card, on which the Ham Pi distro was to be loaded. This has now been loaded and booted successfully. Now it is time to play with the new toy…Note: Audio output from Pulseaudio is muted. Unmute this setting if you want to hear audio from youtube videos, etc.Always look for a field day report from this guy on Youtube, this is a video of his field day station this year:Here are a couple of links to books boys may have read about radio many years ago, perhaps even some of you have read some of these:The original Neophyte Receiver was published in OST, February 1988, and used the new Signetics Si602 oscillator-mixer chip to directly convert radio frequency signals to DSB audio and the National Semiconductor LM386 audio amplifier chip to provide sufficient signal gain to drive headphones or even a small speaker. This receiver uses an improved mixer chip, NE612, which is a direct substitution.Mitch Powell, VE3OT, modified the Neophyte using parts on hand so that his Fanshawe students could build a simple receiver, gaining circuit building skills while being exposed to the hobby of Ham Radio. Two 10.7MHz IF transformers are used as an RF pre-selector, tuned down into the 40m ham band by placing about 100pF of capacitance across the main coil winding. A third IF transformer is used as the Local Oscillator coil, suitably tuned by additional capacitance and a variable capacitance diode, or Varicap, biased by a DC voltage from the 10kW tuning potentiometer. Mitch used two common power rectifier diodes, 1N4005, in parallel as a varicap. Audio from the NE612 is bandwidth limited by a simple C-R-C low pass filter, fed into the 50kW volume control, and then applied to the inverting input of the LM386N audio amplifier. The original Neophyte design used both outputs of the mixer and both inputs of the audio amplifier for improved dynamic range and lower noise, but lacked a volume control.Note that a 0.1uF cap has been added to the LM386 power pin (6) for improved stability. The Tuning Potentiometer can be a 50K linear for slightly reduced power draw. We moved in 2013 and I had not set up any kind of station at the new place since. Before the 2016 CQ WW SSB Contest, I decided to try to make some contacts during the contest so I needed to set up a station with some kind of antenna. I dug the TS50 out of the dust bin and used it. I resurrected 2 20M mobile whips, stuck them up on a pole in a dipole configuration and was on the air. As you can see in the log, I did make some interesting contacts on Sunday afternoon. I did not realize that TM4L was in France until I looked up the call after I shutdown. Nice one, considering there were no signals to be heard on Friday night at the beginning of the contest. Nice restart to a hobby I have enjoyed since 1965.Al VE3GAM SolderSmoke Podcast 147 is available for downloading:http://soldersmoke.blogspot.comOctober 29/30 2012Hurricane Sandy on the wayThanks for birthday wishesEinstein a very nice fellow with a bit of the KnackRocket project update808 key chain cameras (thanks for the Amazon support!)Audio output transformer for Barbados Barebones RXMighty Midget RX breaking it, fixing it (with help from friends)Freq counter connection to Tek scopeHalli S-38E How to avoid electrocution?The HQ-100 s anti-drift alarm clockBook Review: Instruments of Amplification by H.P. Friedrichs (5 Soldering Irons!)BANDSWEEP: 20 meter SSB via DC receiver on hurricane dayReport on outcome of the hurricane inverter saves the day (really the night)MAILBAG (a big one). Dayton Hamvention 2011Going to Dayton 2012? Friends of mine are biking from Ann Arbor, Michigan to Dayton. These crazy guys are John VE3JC, Ken VE3ELA and Russ KB8U. Ric VE3RLX is the driver of the accompanying vehicle. Good luck guys and, if I get any pictures from them on their trip, I will post them.Dayton Hamvention linkFDIM (Four Days In May) link

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