I’m trying to determine if my Yaesu NC 88U battery charger is kaput.
The charger is a small light 12V @ 200mA unit that came with my VX 170 handheld and is supplied with many Yaesu products. It’s small and light enough to be a switched mode device. I don’t expect stunning regulation when off load I do expect OK regulation when charging a battery. The off load voltage is 19V which feels abnormally high for a switcher.
You can display the “battery” voltage on the VX 170. So on battery it may read 7.6V and when you connect the charger from my FT817 the voltage fluctuates for 30secs or so till stabilising at 12.2-12.5V. If I use the NC 88U with VX 170 then the voltage is madly varying… 8.5-13.5V and here, there and everywhere in between and constantly changing.
If you have an NC 88U charger can you measure the voltage off load and when it is charging, I’m guessing most Yaesu modern handhelds will be able to do display the voltage. Let me know if yours does the same or not. I’m thinking the feedback or Vref in mine is kaput in someway which is why the voltage is varying so much on load and so high off load.
Shame if it is broken as it is bijou and petite and doesn’t take up loads of space if I am going away on a SOTApedition. I can always snip the cable and use it as a genuine Yaesu FT817/VX170 power lead. It also fits the Alinco DJ-G7 144-432-1296 handheld as well. That can go to a cigarette light plug and charge the VX 170 whilst driving.