[time-nuts] Re: GPS Splitter for L1, GNSS, etc?

[shouldbe q931]

On Wed, Jun 2, 2021 at 5:21 AM W7SLS <w7sls.scott at gmail.com> wrote:
>
> Hello,
>
> Looking for group wisdom to avoid newbie mistakes with a GPS splitter.
>
> For context, I’m a home- not National- or University-Lab.
> That said, I have a non-zero budget.
>
> Today:
>         Antenna
>         1- CORS RTK GNSS Survey Antenna high gain measurement GNSS GPS GLONASS BDS <https://www.ebay.com/itm/253786590956>
>         2 - patch antenna - works really well with Time Hat, even a few meters way from window
>
>         Splitter
>         1 - Symmetricom 58536A
>
>         Devices
>         1 - Auction Site GPSDO
>         2 - Leo Bodnar GPSDO
>         3 - Time Hat <— wow!  a fan!
>         4 - (on the way) 2nd Time Hat
>
>         Site
>         - suburban, forest to the S, hill to the N
>
> Challenge:
>
>         Existing  splitter is L1 only (I think), which blocks the many newer GPS satellites.
>         With my compromised (for GPS) location, that’s not so good.
>
> I need / want a wider band GPS Splitter
>
>         1 - some posts talk about removing the bandpass filters in an existing splitter
>                 OK, but (a) it nukes any value of that splitter, and (b) those filters also eliminate other interference (yes?)
>
>         2 - new choices seem to be in the $1000 and way above, outside of my budget
>
>         3 - more interested in ‘ready to use’ than ‘have to add on bypasses' to power the antenna (e.g., Cable TV splitter)
>
>         3 - auction site has numerous options, but I’m not sure how to 'separate wheat from chaff’
>
>                 LOL, some of you may be the sellers :)
>
>                 several items $500+  <— more than I want to spend
>                 several items $30 -   <— I’d rather not get  aTV antenna splitter and a hobby to make it work
>
>                 324575653743  GPS Source S14 $175
>
>                 153359161105  GPS Antenna Splitter GPS/GLONASS L1 GALILEO E1 BEIDOU B1- FedEx Fast Ship SV1AFN $120
>
>
> Thoughts?   Thanks for the group bandwidth.
>
> Scott W7SLS
>
> PS:  yes the Symmetricom 58536A will be for sale after I replace it.
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One might consider something like
https://www.ebay.com/itm/402528611114 combined with SMA