[Moon-net] 2 receivers with the same antenna

[Sergio]

Gabriel,

as other have you suggested, you can practically use a resistive power 
splitter to accomplish your job.   Theoretically that 'shall' not be the 
cleanest and best way, though.  In a truly perfect scenario the 
receivers shall not 'see' each other and that cannot be accomplished 
simply by a resistive splitter.

It seems strange but receivers might be leaking RF coming from the 
oscillator chain or other sources through the antenna.  In this case the 
other receiver might not be 'too happy'.  It is clear that a very 
detailed investigation shall be carried out to evaluate the frequencies 
and magnitude of the possible interfering signals. In some cases it 
might not be a problem, maybe just like in your case.

Anyhow it does happen, I've seen it a number of times in some cheap home 
TV installations where strange lines were appearing on the screen after 
some two or more TV sets were connected with resistive or even inductive 
splitters on the same antenna.  Ok AM TV tuners are all but 
technological devices but they are a proof of that being a possibility. 
Imagine that during WW2 the receivers LO leakage was even used to detect 
the proximity of the enemies sometimes, no radars needed!

Go ahead and use your splitter now. Hi.

Ciao

Sergio IK2MMB

Gabriel - EA6VQ ha scritto:
> Hi,
> 
> Might be this is a silly question, but I can't find very much information
> about this subject using Google.
> 
> What is the right (lowless) way to connect two 144 MHz receivers to a single
> antenna?
> 
> I want to make some tests comparing the reception of my usual receiver
> against an SDR-IQ receiver. What kind of splitter should I use?
> 
> 73. Gabriel - EA6VQ
> =====================================================
> Web-Site: HTTP://www.vhfdx.net
> VQLog: HTTP://www.vqlog.com
> VHF-UHF Propagation warnings by E-Mail:
>         HTTP://www.vhfdx.net/spots/warnings.php
> =====================================================
> 
> 
> _______________________________________________
> Moon-Net posting and subscription instructions are at http://www.nlsa.com/nets/moon-net-help.html
> 
> 
 
 
 --
 Email.it, the professional e-mail, gratis per te: http://www.email.it/f
 
 Sponsor:
 Con Fiditalia Premia i tuoi desideri prendono forma! L'unico prestito con 11 rate all'anno!
* 
 Clicca qui: http://adv.email.it/cgi-bin/foclick.cgi?mid=7067&d=17-11