Re: 5W Power Amp and the U3S; Options for a few watts
K2DB Paul Mackanos
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Sam, or anyone else that would like it, I can take more detailed pictures and show you what I’m working on. I mounted two little 5 volt cooling fans on the bottom left rear of the enclosure, one blowing air in, and one blowing air out of the enclosure. I also epoxied a temperature sensor on the top part of the heat sink for the amplifier, and one externally on the rear panel. My goal is to use the DB nine connector, and hook up to my Clock to monitor the inside and outside temperature of the unit, And connect the external GPS antenna, with this sheltering in place I may finish it in another month or two 🤪 then again maybe tomorrow or the day after, who knows😎
Due to the fact that I have 160 m low pass filter installed, I had to extend the nylon spacers between the LPF board and the amp so that the coils did not short on the bottom of the amp board. I had to use slightly longer screws to fit the threads on the nylon insulator. I had to install the 160 m LPF on the relay board because the pins connecting the LPF to the main board we’re not long enough to allow me to use it in the slot 0, So I mounted it in slot 5. I also had to use a shorter DC Power connector, because the heat sink would have shorted against the original connector.
Like I mentioned, if anybody wants me to take detailed pictures of the whole project I would be willing to do that. 😉
On Tue, Apr 14, 2020 at 1:03 PM K2DB Paul Mackanos via groups.io <firstname.lastname@example.org> wrote: