I mentioned on my rod holder thread that it's nice Scotty, Ram and others are starting to make interchanging fittings.
Came up with a way to mount Standard Horizons HX890 on a 1" ram ball and move it from boat to boat.
First trick was how to mount the SH SCH-11 bulkhead mounting bracket to a 1" ram ball.
Started with a Scotty 150 ball mount for my "ram" ball and arm.
Decided to bypass the middle man, cannibalize the two ram balls from the Scotty 150 bases, and mount ram balls and SH radio brackets directly to 1/4" delrin pieces.
The delrin base needs 3 holes - one for ball 1/4" fastener, and two #8 guide holes for the bracket.
Delrin saws with a hacksaw (I used a jeweler's saw), sands like crazy, smooths and grinds with a dremel stone, and drills easily.
Also had to replace the Scotty ball socket head 1/4-20 with a pan-head, reverse it, by putting a nylock in the top of the ball, and a lock washer for the ram ball against the delrin to keep the ball from turning.
Didn't take any photos of the fab steps, but here's the almost finished ram-ball+radio-bracket bolted together on delrin sheet (shaped and dressed later with the dremel).
Since I'm first putting this on the Kestrel dashboard bar, bought two other parts, the Ram short coupler -
I'll be using the long coupler from the Scotty 150 for mounting the radio on two other boats -
1/8" thick delrin would be plenty strong for this, but I went with 1/4" to also let me use self-tapping screws for the radio bracket -
- and the Ram diamond-base 1" ball since it was such a clean mount, and I'm going to use the other Scotty ram ball to make a second radio bracket.
Beneath the #10s are 1/4-inch sex bolts, serrated head, which fit snug in the dashboard bar slots.
The assembled radio mounting bracket on the Kestrel dashboard bar
and with radio installed - of course I can tilt this all around and move it up and down by 4"
Also folds up for neat storage
With this boat, this is pretty much the only place I can mount a radio,
but with both my other boats, it can be mounted either up front or right behind the seat
This photo kind of shows the final set-up