[time-nuts] DIY QFH

[Chuck Harris]

As far as I know it is L1 only.  It is a Bullet II HE, P/N 25045-10,
the standard antenna specified in the Thunderbolt manual.

If you look closely, you will notice that what appears to be a
single soldered joint at the middle, is really two solder joints,
one on each of the sides of the preamp's PCB.

Each "V" has different length legs.  The legs are drooped down to
where they are capacitively loaded to the ground plane.

So, what it is is two inverted V type dipoles in parallel, and
oriented at 90 degrees crossed.

-Chuck Harris

Jim Lux wrote:
> On 11/27/13 8:08 AM, Chuck Harris wrote:
>> Here is some Electrical Engineer pr0n of the Trimble TBolt standard
>> antenna.
>>
>> -Chuck Harris
>>
>> Apparently spelling out the "P" word gets your message rejected.
>>
>
> Is that a L1 only antenna?
>
> What's interesting is that this is NOT a crossed dipole, at least from what I can
> see. It looks like all 4 arms are connected to the same point at the top. So it's
> some sort of funky folded monopole
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