[time-nuts] eBay GPS antenna test.

Clint Jay cjaysharp at gmail.com
Tue Feb 13 11:06:54 EST 2018

Sounds like a drop shipping operation, they've found a supplier in China
who is willing to send goods either in plain wrapping without any supplier
name or the name of the agent who's selling it. It can be useful to Google
anything that looks like a part number on the packaging, you'll often find
the main wholesaler or even the manufacturer.

On 13 Feb 2018 15:48, "John Green" <wpxs472 at gmail.com> wrote:

> Bob wrote:  Sitting here casually reading the data sheets for some of the
> modern Trimble
> survey receivers - they have gone to 7.2V (just below your 7.5V trigger
> point)
> as an antenna supply voltage.
> Who knows what that might imply relative to this antenna.
> After getting my refund, I sent the seller a message saying that I would
> buy another if he could assure me it would work at 12 volts. He replied
> that he needed to get his hands on a couple and do some testing first. The
> antenna that I received seems to be different to the one pictured in the
> eBay listing. At least the labels are different. I get the feeling he is
> kind of a third party dealing with someone in China who is wholesaling
> antennas made by someone else. Who really knows what spec. these are made
> to, or by who. In my former place of employment, we made an SMB terminator.
> Basically, a 75 ohm resistor soldered across the pins of an SMB connector,
> then molded in black plastic. We bought the connectors from a Chinese
> supplier who supplied them in individual plastic bags. We had to cut the
> parts out of the bags before processing, which added a labor step. We tried
> to get the supplier to sell them to us packaged in bulk, but they refused.
> We decided that they were actually buying them from someone else and just
> doing a passthru. The connectors themselves would change from time to time,
> which caused problems in molding, and sometimes caused the electrical
> performance to degrade. Getting parts to reliably meet a specification from
> China can be a problem. I can't even imagine the issues that could arise
> when you try to source an assembly, or completed product.
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