[time-nuts] Re: GPS antenna distribution???

[Bob kb8tq]

Hi

Pretty much *any* splitter will have issues with outputs being un-terminated.
Resistive splitters are really no worse that others. The problem that they have
is 6db of loss per split rather than 3db. 

The Symmetricom units are not immune to this. They have a single amplifier that
drives a splitter. 

A “DC output” module or receiver normally will be quite happy running into a 
blocking capacitor. The dirt cheap ebay parts seem to do fine. It is rare to find
a device that refuses to work this way. The “why” is that basement crazies aren’t
the only ones to run splitters …..

Bob

> On Jun 29, 2021, at 2:16 AM, Julien Goodwin <time-nuts at studio442.com.au> wrote:
> 
> I keep forgetting to do a thread about this.
> 
> I recently (er, perhaps a year ago) picked up a Microlab unit, and was
> very disappointed, notably the output simply isn't built to handle being
> plugged into units that provide antenna power, with each port ending up
> having a DC path to ground (at 200 ohm, so not too terrible, but it's
> still not great). Plus being a simple resistive splitter it's not ideal
> if all outputs aren't terminated.
> 
> Luckily the Sysmocom unit mentioned elsewhere is fine with this (up to
> 12v because I specifically talked to them about this exact issue when
> they were working on it).
> 
> On 27/6/21 1:49 pm, lstoskopf at cox.net wrote:
>> I seem to have an gathering of GPS antenna on my window ledge.  I seem to have missed info on building a splitter/amp to take one signal and distribute it.  Quick reference?  N0UU
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at lists.febo.com -- To unsubscribe send an email to time-nuts-leave at lists.febo.com
>> To unsubscribe, go to and follow the instructions there.
>> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com -- To unsubscribe send an email to time-nuts-leave at lists.febo.com
> To unsubscribe, go to and follow the instructions there.