[TowerTalk] [Bulk] Re: Mounting Ham IV vs Yaesu SDX 2800

[Grant Saviers]

I slotted a custom designed 0.25" thick plate for an R65 tower to handle 
both Yaesu and Ham IV.  The slot was 0.44" wide and 0.232" center to 
center of the end mill travel.  So, it is next to impossible to drill a 
second hole since it overlaps the existing hole.  A carbide burr or file 
are your options although you might start with a smaller diameter hole 
that doesn't overlap the existing one.  Yaesu uses 8mm bolts, be sure 
they don't bottom in the casting with the thinner HDX mounting plate.  
The 0.44" slot width was for subsequent hot dip galvanizing of the 
plate, you don't need that width for 8mm or Ham IV 3/8" bolts.

Grant KZ1W

On 5/15/2015 3:32 AM, David Robbins wrote:
>> I have a US Tower HDX 572 that has a rotator plate drilled for a Ham
>> IV rotator.  I need to install a Yaesu SDX 2800 rotator. I believe the
>> Yaesu requires a different mounting hole pattern.  Does anyone have
>> tips / ideas on how to most easily make the alteration to the existing
> mouting plate?
>
> I recommend a drill.
>
> David Robbins K1TTT
> e-mail: mailto:k1ttt at arrl.net
> web: http://wiki.k1ttt.net
> AR-Cluster node: 145.69MHz or telnet://k1ttt.net
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