Re: reverse polarity protection (


I agree with Jerry and that’s how I wired my uBitx up except I added a separate switch for the PA.




From: [] On Behalf Of Jerry Gaffke via Groups.Io
Sent: Tuesday, August 7, 2018 10:22 AM
Subject: Re: [BITX20] reverse polarity protection (


The hfsignals WireUp instructions for power into the rig at the top of
have a symbol that looks like headphones.
Some have mistaken it for a fuse, that's definitely the wrong position for a fuse.
The label on that symbol says "On/Off", so we can assume it's a power switch.

Here's an old post showing how I wired mine up:

On Tue, Aug 7, 2018 at 07:31 AM, Jerry Gaffke wrote:

My preferred solution:

The instructions for reverse polarity protecton on the uBitx WireUp page would be acceptable  
if they also showed a 3 Amp fuse in line with the +12v lead from the power supply.

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