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Hi Hamilton:
Thanks for the details. I sent you a response email to the “.gmail.com” . address. Did you get that material? In short to your question, I am still using the “Lego Yagi” construction as described and demonstrated in 3 articles for the club’s website. I have made minor changes that I described in the email. My goal is to make quantitative measurements versus the lightbulb bridged receiver antenna, which is a good visual.
BTW, on Amazon I see telescoping antenna with F connectors…they are 75 ohm connectors. Is that an issue? I cobbled bnc connectors to my driven antenna elements, but it’s quite kludgy. F connectors are definitely a better choice.
The christmas tree lights 1/4 wave antenna that I use to show the current profile along the elements is a good visual demo. However, I have tried to tweak the Rogowski “pickup” coil to give a quantitative profile of the current without success. I understand this circuit’s output drops significantly at high frequency. So, is there a low-cost circuit that can achieve my goal?
Thanks & 73, Dave (N1RF)
Hamilton, Thanks for the pptx on combining the demo 2m yagi construct with 4nec2 software. I’ll add it to my lecture as well. BTW, I now feed the receiver antenna direct to an air-cool dummy load, convert signal to dc and display with a 1 in LCD display 5v meter. I would appreciate your configuration.
73, N1RF
Dave M.
CONGRATULATIONS to the HAB Team:
Great Going everyone. Just checked the status at aprs.fi. Very Cool!
Dave (N1RF)
Thank you Mike, much appreciate the help.
Everyone: I have bought 6- 19 gallon tubs that should work for packing items. I’ll bring along a general tool kit, and Workmate. Anything else you can think of needing?
Also, I’ll get a box of Joe and donuts from DunknDonuts as weak as a 12 pack of water.
Dave
Thanks Fred, Jamey and Matt, I appreciate your help and fast response. I’m sure we can get a few more volunteers to help and run through the task list in quick time.
Dave N1RF
Thanks much, Anita. Which IDE on Python.org. ? What’s it name? Python.org is a great site and they have an area with many IDE’s described by platform. I’m just starting the project so can switch if yours beats PyCharm. The project involves using R-Pi to coordinate 2 XBees working together for an IoT to control/monitor home devices.
As for reference books. I have both hard copy and e-copy of Lutz’s “Learning Python 5ed”. It’s good for detailed descriptions; less so for sample problem practice. However, there are lots of sites with problem exercise sets; I like w3resource.com. Many yrs ago, I had a novice knowledge of coding in Python.
Dave
Hi Bambi:
The testing with Matt should find a solution for you. I live in Merrimack and usually use a G5RV for the net. It runs broadside East-West and I operate with 50 watts or less. I would guess most of us are running horizontal polarization; but a few like Matt and Russell have success with verticals.
Catch you on the air sometime.
73,
Dave N1RF
Hi Tony:
Perhaps you have already moved forward on this task. I wonder if you have looked at the mast raiser/support DIY/kit from bend-gard.com ? The website has some detailed pages on how to build the mast raiser and how to secure it in ground or bracketed to house.
Thanks much Hamilton.
Omni-Rig and the 2:1 RF switch kit look pretty good. What other rig control and logging programs are you using?
So, the idea seems quite reasonable. What’s your new idea project? I need to do more in-depth reading. You’re way ahead of me.
Dave N1RF
Great discussion! Greg and Hamilton, I want to expand the goal. Could an SDR dongle/SDR Player, etc be used as a “second receiver” fully integrated into a basic transceiver like an IC 7300 or even a legacy TS450 sat (Yes, I still use the Kenwood and it’s wired to HRD as is the Icom).
1. With the Tr switching issue solved for Greg, are we halfway?
2. Now with SDR Player having found a station on another band and HDSDR having all the settings known (even displayed) how can I send that data to my transceiver as a command line? Can HRD or Dx Suite software do this?
The concept seems an inexpensive way to get that high price dual receiver radio on the cheap??
Dave N1RF