[time-nuts] GPS antenna splitter recommendation?

[Bob kb8tq]

Hi

At 1.5 GHz something like a 50 to 100 pf NPO is probably the best
pick for a blocking cap. 

Why? It does a fine job at the intended frequency. It acts as a high pass
down lower where lightning energy is a bit higher ….

Bob

> On Apr 30, 2020, at 9:25 AM, Ben Hall <kd5byb at gmail.com> wrote:
> 
> On 4/30/2020 7:33 AM, Bob kb8tq wrote:
>> Pretty much all the Mini Circuits splitters will pass DC.
> 
> Hi Bob and all,
> 
> That's absolutely correct.  Something you might consider is what I did - I got a pair of Mini-Circuits ZC6PD-1900W's cheap on the e-place. Frequency-wise and loss-wise, not perfect, but good enough for me. Problem was, like you note, all the ports are DC-pass, and I wanted only output port 1 to be supplying DC to the antenna.
> 
> So I opened mine up, carefully cut the trace going to outputs 2 and up, and bridged them with, IIRC, a 0.01uF ceramic capacitor to block DC.
> 
> Before and after plots on the VNA at work showed very little increase in loss after the mod compared to before the mod.
> 
> Just some food for thought.  :)
> 
> thanks much and 73,
> ben, kd5byb
> 
> 
> 
> 
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