PART 2: Idiot’s Guide To Building An Allstar Node - POWER! - Amateur Ham Radio 2E0BMT
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- เผยแพร่เมื่อ 3 ก.ค. 2024
- Here is my idiots guide to building an Allstar Node - Part one.
To entre the competition, please click here: • Allstar Node or Kit Fr...
I’m not an expert, I’m an idiot. If you want to see the experts, please check these guys out:
Peter Kendall G7RPG - / mrpknuts
Scott Nimmo - www.allstarsetup.com
David KB4FXC - www.hamvoip.org
In this video, I set up the power supply.
73!
very pleased with the video"s Ben, Im saving the videos so I can watch them over and over again and select subtitles on youtube, so my wife can read the information to me due to my eye sight
Thanks for showing the whole build, including the little hiccups along the way as well. Makes me feel a bit more human. Might have a go at making more little projects myself now.
Hi, I saw the video last year whilst locked down in the Philippines, now I eventually get home to the UK, I built my own AllStar node to replace one I built and gave away to a Ham friend in early 2020. This time I used 2x buck converters as they are so cheap, I actually bought 10 and the remaining 8 I can use back at work. Just following up, yes a diode will drop 0.6 - 1.0v depending on the forward current. If you look at the manufacturer's data you will see on this on their graphs. The BF888 I modified by removing the output transistor, biasing components, RF choke etc, the RF output is reduced to less than 50mW and the current draw of the radio is much lower and predictable.
If you want to do this on 2m then use a Baofeng UV82, they're currently 23 pounds and better quality than the UV5R.
There is an annoying squealing noise on some Allstar nodes I have heard in QSOs, the fix is to use to LT400 transformers in the mic and loudspeaker circuits between the CM108 FOB and BF888, this provides a DC break, earth loop preventing, low pass filter (typical of steel/iron laminate audio transformer) and impedance matching. This can also be done with passive components but the price and benefits, 2 transformers would be my choice.
Great stuff! If only everyone shared your enthusiasm for the hobby 😁
I prepare my own liquid flux. It comprises 95% alcohol and some resin. I keep the lid tightly closed lest it gets dry. I am so entertained watching the events unfolded. Unbelievable 5 Volts when you touched it!
Thanks for watching! 73
Outstanding video keep them coming
Many thanks!
I am enjoying this video immensely, with all your real time hands on build, besides using two buck converters my comment is well done. VE3-ZPQ Canada.
Hi Ben. When I make mine I'm going to mod it to take the nominal 12v from the shack PSU thru banana sockets. And maybe break out a usb socket to the front of the case.
Great work Ben!
Really enjoying your informative video's.👍
Gary, VK6WCH
Nice video as if you are doing it just in front of me. '73 Mabuhay !
Really want to learn more about this Mike KA8IIM
Thanks Ben! Do you have a shopping list with where you bought the bits. Following and building! M7BIA
Shopping lost in full is in the details on the first list. Hope that helps
Ypou need to be drawing some current through the diodes before you measure.
Thanks. How would I do that? Just add a resistor?
Why did you use more than one diode. I understand that you don't want feedback, by using a diode, but why not a diode and a resistor. the voltage is pretty low, so heat generation within the resistor wouldn't be too bad.
Great question. The diode drops the voltage by about 0.6v, you are correct that the right resistance would have done to trick too. BUT the load of the radio will vary dependent on if it is tx or rx. This would mean a different potential difference with each model, whereas the diode is constant rather than comparative voltage drop. And I had a bulk load of these diodes, so went with them. Thanks for watching.
@@RadioRevG5REV it threw me too. I was questioning why diode and not resister