I did not read the whole thread. However be careful not to overcharge lithium batteries. Even 10mA at over voltage can cause them to burn. The use if protection circuit and/or BMS snd/or dedicated bal

I plan to do something similar but I bought a 2000mAh NiMh battery as they are a little less temperamental than LiPo and Tenergy is a known brand. I also bought the Tenergy charger that I will plug in

Jerry, Just in-case you didn’t see this……………….. Folks, A data sheet is usually a good start to avoid the “fake news”. This data extracted from https://www.eemb.com/. Ambient Temperature:25±5℃; Relativ

The IRF510's would be quite happy with 16.8v, and would operate with less distortion for the same power out than they do at 12v. But you would need a 12v regulator such as the LM2940T-12 on the main u

What about using 14430 LiFePO4 outdoor solar light batteries? They are 3.2v each so with 4 you would get 12.8v nominal. And they are available on Amazon.com in bulk quantities with or without charger.

Nice find Arv, thanks for all you contribute

Folks, A data sheet is usually a good start to avoid the “fake news”. This data extracted from https://www.eemb.com/. Ambient Temperature:25±5℃; Relative Huimdity:65±20% Nominal Voltage 3.7V per cell

Folks, A data sheet is usually a good start to avoid the “fake news”. This data extracted from https://www.eemb.com/. Ambient Temperature:25±5℃; Relative Huimdity:65±20% Nominal Voltage 3.7V per cell

Folks, A data sheet is usually a good start to avoid the “fake news”. This data extracted from https://www.eemb.com/. Ambient Temperature:25±5℃; Relative Huimdity:65±20% Nominal Voltage 3.7V per cell

Thank you Shirley, I thought I had heard about higher, full charge terminal voltages for those. The tables i looked at say 3.7 volts and nothing about that 4.2 volts. So using three of those cells sta

GMTA {;->>>

Want a cheap and dirty way to reduce the 14.8V...? Put diode/s in series with the battery lead. Each power diode is 0.6V drop across the junction so two of them would drop the voltage by1.2V or 14.8 -

Might be able to use the charge/discharge charts for 18650 cells and only charge your cells to 13.6 volts. Could also insert two power diodes in series with the 14.8V and have 13.6V for the radio. Arv

A lead-acid battery cell voltage is 2.2V I charged the batteries I have and measured them. Real life check, surpasses high theory. +/- 6.43V if I remember correctly. You must be talking about another

That four cell battery would deliver 16.8V at full charge, which is much too high for a lot of ham gear. After you use up the first 10% of your battery's capacity it will drop to around 14.8V, which i

https://www.instructables.com/DIY-Digital-Soldering-Station/?utm_source=newsletter&utm_medium=email _._

Scott, The v3 to v5 ubitx used a similar connector and two separate insulated wires. I would use what you have pictured, just twisting them in a twisted pair. 73 Evan AC9TU

Scott, If you use this 2P black/red cable, be sure and check polarity. i.e. ground might be on red the way it looks to be keyed. You should have a 2P black/brown cable supplied with your kit. This is

Elia, The v5 ubitx also has the 11.059MHz SSB filter. That was one of the changes from the v4. Here is a link to a v6 conversion on ubitx.net: http://ubitx.net/2020/01/06/a-v6-nextion-display-conversi

Hi, When we used to ship tube radios (does anybody remember those?) we bulled the tubes and sent them separately - for the same reason. The more things change the more they stay the same. 73, Bill KU8