Hi Scott,
I use a power-splitter (http://www.pe0sat.vgnet.nl/antenna/power-splitter/) in reverse.
So two receivers connected to the same antenna via this splitter.
This, as expected will drop down the signal with 3db but leaves the impedance at 50 ohm.
Make sure you don't, by accident, TX or enable a BIAS-T on such a setup. I have a complete separate DC supply to the pre-amp.
Antenna -> pre-amp -> coax -> power splitter -> RX1 -> RX2
73 Jan PE0SAT
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On 11-01-2017 02:11, Scott wrote:
Hi everyone.
I suppose that any deviation from the ideal setup of a near-perfectly matched antenna & receiver will have SOME negative effect, but for a receive-only antenna, how badly am I hurting myself to split the antenna between two receivers?
Since frequency is probably important to answer this, I’m referring to 70cm.
Also, if it matters, I have a very good preamp (SP-70 from SSB) at the antenna feeding 25 meters of LMR-400. Both receivers are SDR devices (receive-only).
When I tested against a 70cm beacon, there was some small reduction in signal strength but it wasn’t much. With voice, you might not notice but my interest is telemetry data.
Thanks for any recommendations or experiences with a similar arrangement!
-Scott, K4KDR Montpelier, VA USA twitter: @scott23192 _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb