Bitcoin donations to: 1CE9UfWJcHBYkWPns7iqBqZgKhd5xfqEaM thanks!
Buy Bitcoins easily by clicking HERE and get $10 in free bitcoins!

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - David VK2DMH

Pages: [1]
1
Net Activity / Re: Maritime CW.
« on: Today at 04:34:02 AM »
How long is the radiating part of your boat's insulated backstay? Thank you.

2
Batteries & Solar / Re: Best portable battey pack for QRP HF/CW
« on: September 13, 2017, 12:51:49 AM »
Youkits (a Chinese manufacturer of decent QRP radios) used to sell a 3-cell 12v lipo battery pack to fit some of their CW transceivers and also run their rather nice little antenna analyzers. Unfortunately the carriage services eventually put a stop to their selling the battery packs. I know because I tried to buy three packs myself. They reached Australia but were sent back to Shanghai and I believe Youkits was fined. So they do not sell the battery packs anymore.

Why do I tell you this? Because the cells inside were exactly as described previously. Three 3.7v 18650 cells with a small voltage-balancing circuit board soldered on and neatly shrink-wrapped. The package could be charged by any 12.5 to 13.X charger, and would not overcharge.

So now I have bought some of the 3S cell-holders from off eBay, and bought 3x Youkits (a Chinese manufacturer of decent QRP radios) used to sell a 3-cell 12v lipo battery pack to fit some of their CW transceivers and also run their rather nice little antenna analyzers. Unfortunately the carriage services eventually put a stop to their selling the battery packs. I know because I tried to buy three packs myself. They reached Australia but were sent back to Shanghai and I believe Youkits was fined. So they do not sell the battery packs anymore.

Why do I tell you this? Because the cells inside were exactly as described previously. Three 3.7v cells with a small voltage-balancing circuit board soldered on and neatly shrink-wrapped. The package could be charged by any 12.5 to 13.X charger, and would not overcharge.

So now I have bought some of the 18650 3-cell-holders from off eBay, and bought three 18650 lipo cells locally. (A rip-off from Jaycar Electronics at A$15 each.) But at least I will have another useful way of running a QRP radio in the field. I also bought a NITECORE D4 Digicharger which will run off 12v DC or AC mains (110-240V), and charges up to 4 cells at one time.

Pages: [1]