Hi
As with any antenna mods, the issue isn’t so much doing them as proving that
what you did had this or that effect. A lot of what you are paying for on the
fancy
antennas is the fact that indeed they went through some sort of validation
process
on top of the design process.
An equally valid
On 2/15/18 6:04 AM, Bob kb8tq wrote:
Hi
There are a number of reasons to believe that these antennas are worse
than the typical “telecom GPS” antenna for L1 only duty driving a TBolt.
If you are going to do L1 / L2 work with something like a NetRS, then indeed
you will need a dual band antenna.
Hi
There are a number of reasons to believe that these antennas are worse
than the typical “telecom GPS” antenna for L1 only duty driving a TBolt.
If you are going to do L1 / L2 work with something like a NetRS, then indeed
you will need a dual band antenna. These (the $99 ones) are the lowest
I would be extremely surprised if ebay does not rule in your favor.
I've only had ONE case EVER opened against me, and it was CLEARLY not a
valid case, but eBay still made me give the buyer his money back IN FULL
to include shipping.
eBay almost always picks the buyer over the seller.
73,
Hi
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.
Bob
> On Feb 11, 2018, at 12:44 PM, John
They have issued a refund. The seller said that my antenna was defective.
This is kind of a strange outfit. They are in Russia selling Chinese goods,
shipped from China. Since I don't have to return it, I will disassemble it
to see what went bad. I replied that if he could assure me that it would
Hi
Well, good news / bad news I guess. The seller is at least responding to your
input. They also did not come back with something about “there is no voltage
spec”. It’s quite possible that they are the 5th person in a chain of sellers
and
a substitution got made (unknown to them) at seller 3.
I opened a "Not as listed" case and heard back from the seller. They said
that the antenna is definitely 3.3 to 18 volts and have sold several that
are in operation. They wanted to know specifically how I tested the
antenna, why I thought it shorted, and if I actually ever hooked it to a
GPS
Hi
Ok, the antenna in the pictures on the listing *does* have labeling in English
and it sure looks like it says 3.3 to 18V on the antenna. Certainly you have
(and the rest of us may soon have) a case for “not as shown” in terms of
what you got (and we get).
Bob
> On Feb 9, 2018, at 9:31 PM,
Bob wrote:
Is it labeled 3.3 to 18V on the antenna?
No, the writing on the antenna is all Chinese. The specs published on eBay
state that it is.
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
I would surmise that the antenna has (or rather had) a protection network
to protect against voltage spikes or surges. Your description of events
seems consistent with an triggered SCR crowbar circuit, and the 2nd
attempt at the higher current limit shorted the SCR. Note that this may
not have
On 9 February 2018 at 21:43, John Green wrote:
> To those who doubted that the antenna was actually a 3.3 to 18 volt design,
> it seems you were correct. Today, I hooked it up to a variable power supply
> and slowly raised the DC voltage fed to the antenna. It began to pull
>
Hi
Is it labeled 3.3 to 18V on the antenna?
Bob
> On Feb 9, 2018, at 4:43 PM, John Green wrote:
>
> To those who doubted that the antenna was actually a 3.3 to 18 volt design,
> it seems you were correct. Today, I hooked it up to a variable power supply
> and slowly raised
To those who doubted that the antenna was actually a 3.3 to 18 volt design,
it seems you were correct. Today, I hooked it up to a variable power supply
and slowly raised the DC voltage fed to the antenna. It began to pull
current at about 2.9 volts and at 3.3 volts, took about 40 mA. I continued
14 matches
Mail list logo