DC-DC Converter?

[g0anv]

Hi All,
I have a spare Charging Pod for the 77 and am thinking of using it to power the radio with a DC-DC converter.
I have followed an article to make a Battery Eliminator that uses the same DC-DC converter, which suggests setting the voltage to the radio as 8.2v?
Is this a good idea or should it be set at 7.4v which is the battery voltage.
73
de
Daryl.
G0 ANV

[VK3KYY]

The radio uses to Lipo cells.

These are approx 4.2V per cell when fully charged, i.e 8.4V (or just under).

So if you want to "float" the battery from a supply e.g. to use the Hotspot all the time, you are probably going to need a PSU that will output around 8V,

BTW. Be very careful when running the GD-77 from a supply that shares a ground with the USB cable, because W1HRS damaged his audio chip doing this, by plugging in the USB cable to the radio when the radio was being powered from a supply that had the same GND as the USB cable.

i.e This was a RPi PiStar setup

[F1CXG]

Thanks for the advice roger, I am looking for a solution to supply one of my hotspot GD77 an RPI3 ....

[VK3KYY]

I think using a Buck converter will work, but you need to be careful only to turn the power on, when everything is connected, so that there are not any partial connections like when the twin jack plug connector is inserted