[time-nuts] GN-GGB0710 GPS Antenna Mounting Thread

[Brooke Clarke]

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 <skip.withrow at gmail.com> 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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