Re: Can wireless reliability be enhanced?

[L. M. Rappaport <nospam@xxxxxxxxxxx>]

Thanks, Dave,

There's one other issue first.  The console can retransmit on a
separate frequency.  At least the original VP could do that so that
you can use a monitor elsewhere.  I have to make certain that the VP2
doesn't do that as a matter of course, or, as you know, poof goes the
preamp!

Thanks for the help.  I'll take a look.

Best,

--

Larry
rapp@xxxxxxx


On Sun, 05 Feb 2006 17:55:44 GMT, nobody@xxxxxxxxxxxx (Dave Houston)
wrote (with possible editing):

>They're printed on FR-4. Search Ramsey's site on "antenna". Here's the
>915MHz Yagi and preamp...
>
>
>http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=LPY915
>
>http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=SA7
>
>
>nobody@xxxxxxxxxxxx (Dave Houston) wrote:
>
>>Ramsey Electronics has some printed circuit Yagis that might be useful for
>>this. They're printed on semi-transparent thin plastic substrate.
>>
>>I think the TenTec 1001(?) preamp is good from DC-4GHz. Ramsey also has some
>>wideband preamps.
>>
>>L. M. Rappaport <nospam@xxxxxxxxxxx> wrote:
>>
>>>On Tue, 31 Jan 2006 10:33:11 -0800, "Ken Gibson"
>>><jayel@xxxxxxxxxxxxxxx> wrote (with possible editing):
>>>
>>>>I have found wireless communication to be unreliable.  The wireless links
>>>>for my Davis Vantage Pro weather station, Radio Shack security system and
>>>>Motorola telephone and intercom are all intermittent.  They are all within
>>>>the specified range and have no metal to shield the communication.  I'm not
>>>>surprised by the Radio Shack wireless link because it is inexpensive.  I
>>>>plan to replace the Davis wireless link with a wire if possible.
>>>
>>>While it won't help initially, I share the same problem with the
>>>Davis.  I have two of them - a Davis VP and a Davis VP Pro 2.  Both
>>>operate in the 900 mhz band, the "2" uses spread spectrum.  Both use
>>>simple portable radio type antennae.  It will be extremely difficult
>>>to replace the radios with a wire connection as they are in separate
>>>buildings and the conduit connecting them is almost impossible to
>>>access.
>>>
>>>Both Davis units were intermittent.  The "2" was rock solid until
>>>yesterday, then the connection was broken and the console said there
>>>was no received signal.  Using the console's troubleshooter indicated
>>>no signal at all.  Last night, it started working again.  Legally, as
>>>Dave said, you can replace the console's receiving antenna with
>>>something directional - a small yagi should do the job.  as well as a
>>>small dish, such as one left over from a Direct TV or Dish Network.
>>>You would need to change the feedhorn, but not the positioning since
>>>that is the focal point.  I may try to do this - if it works, you are
>>>welcome to copy it.  If there exists a decent 900 mhz preamp and
>>>assembly, I hope I'll find one and report back here.