Hi:
5/8-11 is a standard surveying tripod head size.
https://prc68.com/I/Tripods.html#Head-0.625x11Solid
It may be you have defective male or female threads that need to be chased.
--
Have Fun,
Brooke Clarke
https://www.PRC68.com
http://www.end2partygovernment.com/2012Issues.html
axioms:
1. The extent to which you can fix or improve something will be limited by how
well you understand how it works.
2. Everybody, with no exceptions, holds false beliefs.
-------- Original Message --------
Hi
I’ve had no issues with 5/8-11 going into any of the Chinese antennas so far.
Bob
On Feb 14, 2019, at 3:09 PM, Skip Withrow <[email protected]> wrote:
Hello Time-Nuts,
As I have been playing with some dual-band GPS receivers, I decided to
order a dual-band antenna to replace my permanent L1 antenna that I
use for all the GPSDOs. I purchased one of the Chinese TOPGNSS model
GN-GGB0710 units. Much smaller than the choke ring I currently have
up (which uses a 1"-10TPI thread).
However, when I went down to the local hardware emporium to acquire
parts to assemble a mounting bracket I seem to have run into an issue.
A 5/8"-11 bolt appeared to be about right for the mounting threads,
but bound after a turn or two. So, I went over to the metric section
and found an M16-2 bolt. It started easily enough, but again bound
after a couple of turns.
Back home I measured the thread pitch and got .08175 inches. Turns
out this is between the 5/8-11 thread (.0909") and the M16-2 thread
(.0787").
I looked up the Trimble antenna mounting specs and they specify 5/8-11
for their geodetic survey antennas.
Since the 5/8 hardware is a lot cheaper than the M16 I'll probably
just use a 5/8 bolt and just screw it on reasonably tight and call it
a day. Just wanted to give the list a heads-up. If there is a secret
mounting thread out there please let me know.
Thanks,
Skip Withrow
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