Weekend project: Solar rechargeable Power Bank for the FT-817ND.
I had two spare batteries, a plastic box IP65, a 20W solar panel with its controller, a tripod and some wires lying around my garage and I’ve decided to build something with it. I placed the two batteries in the box and wired using a 1.5mm cable, then installed the solar panel controller outside and wired the batteries to it. I’ve used a 3 X 12V car plugs as output considering that the solar panel controller has two USB ports embedded so I will have both 12V and 5V ready available anytime.
For the step two I started to build the support for the …
Some weeks ago the Yaesu DR-1X repeater decided to give up on power.
Aurelio ON5AFB, Giorgio ON3II, Alex IW0GXY and myself started to troubleshoot the issue to discover that Yaesu sucks. Please read twice: YAESU SUCKS!
Yeasu engineers decided to build a repeater by using a pair of downgraded version of FTM-400 radios and a aluminum radiator stuck on the transmitter with a silicon gen. These radios are build for a duty-cycle of 1-15 not for a heavy-duty cycle therefore the poor 1/32w resistors controlling the MosFet had become charcoal…
Thanks to Max IW0GXY, we managed to install a front-end to the transmitter and thank to the patience of Aurelio ON5AFB, the resistors were replaced with a more powerful one. Aurelio did something better, re-built the cover of the transmitter to have an additional fan directly on top of it. The fan is configured in extraction mode so the air flows from inside to outside reducing the collection of dust.