Paul,
I am convinced your realization work very well and it is a lower cost
in the market.
But depend what kind of user have to use the device.
For a standard laboratory or a company I am sure is not sufficent your
realization, for an hobbist yes, can be.
Business or research company want to have a datsheet with temperature
range, technical characteristic, a repair service. In one word a
professional package.
Me for example, am an hobbist and I am started from the tv sat splitter
but now, I have bought on ebay a low cost professional splitter.It is
better than mine at least as mechanical realization ad impedance
matching.
That's all.
All the people in time-nuts community want to improve day by day the hw
and sw they have at home.
yes, yesterday night I have bring a bier. Cirio!
Luciano
timeok
Il 2012-10-09 15:15 paul swed ha scritto:
Lots of comments. Indeed it sounds like a great discussion for pizza
and
beer. The more beer the more lively. Did they bring beer?
Fact
I have used a 8 way splitter Sat/TV for 5 years now. Port to port
loss is
something like 16 db or 26 db as I recall. It has dc blocking on all
but 1
port built in. The loss was as advertised. The cost was pretty high
at $7.
To make up for the loss I used a amplifier. A Mar circuit and only
enough
gain to cover the splitter loss since the single antenna has 30db of
gain
and feed 1/2" hardline. So if all of things discussed are happening
its not
at all apparent from the 6 rcvrs on the system. Some old like odetics
austrons some newer like 3801s and Tbolt...Plus I never have to hunt
for a
port for experimenting.
There is one catch and this can apply to all splitters some rcvrs
need a dc
load so that they think they have an antenna. I think about 430 ohms.
As I
say its been 5 years and it just works.
Total investment $10??
Though it doesn't say HP on it.
Regards
Paul
WB8TSL
On Tue, Oct 9, 2012 at 7:14 AM, Robert Atkinson
<robert8...@yahoo.co.uk>wrote:
When GPS first started to be fitted to light aircraft it was found
that LO
leakage from some VHF navigation recivers blocked the GPS when the
NAV was
on certain channels. You can buy a BNC "T" adaptor where the leg of
the T
is a 1.5GHz coax stub notch filter. They go on the NAV RX antenna
connector.
Robert G8RPI.
________________________________
From: gary <li...@lazygranch.com>
To: time-nuts@febo.com
Sent: Tuesday, 9 October 2012, 8:51
Subject: Re: [time-nuts] To use or not to use transmission line
splitters
for GPS receivers
I was wondering about that myself, but my guess is the crosstalk
would be
from whatever grunge was coming from the other GPS. Every amplifier
has
reverse parameters, so a small amount of the crud (circuitry noise)
from
one GPS will reach the other GPS. Not much, but some people are nuts
about
time.
This is a bigger problem with radios, where the locals from one
radio can
reach the input to the other radio.
I was also confused on the notion of a transmission line splitter.
Is this
a Wilkinson or something else?
On 10/9/2012 12:40 AM, Azelio Boriani wrote:
> Crosstalk? With the same signal?
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