Topband: Isolated F81 F Barrel Connector

[Steve Maki]

Can't you just use a non-metallic plate?

-Steve K8LX

On 10/21/18 15:08 PM, Paul Christensen wrote:
> Google isn't my friend today...
> 
> I am looking for an isolated "F" barrel connector, commonly known as the
> F81.  I am designing an aluminum interface plate for use with a Hi-Z
> 8-circle receive array.  The panel will contain multiple F81 barrel
> connectors that attach to the side of a large PVC tool box with gasket
> weather seal.  An isolated F81 is probably a very odd item since it's a
> connector that's not normally used for baseband signal distribution like
> video and data.
> 
> Each of the RG-6 lines run into a Hi-Z switched phasing box where each line
> is connected to a toroid transformer.  As such, measuring resistance from
> the ground of one antenna port to another shows about 30 ohms resistance,
> necessitating isolation at my connection plate.  The Hi-Z phasing box is
> made of PVC material and each antenna input is isolated by virtue of the
> plastic box.
> 
> In the alternative, I could use isolated BNC or TNC connectors with F
> between-series adapters.   Insulating each F81 with its own insolation strip
> is definitely not an option in this application.  The last option is to run
> all lines directly into the large box and make a direct connection to the
> Hi-Z phasing unit.  However, I would really like the option to disconnect on
> the *outside* of the box so that it can be quickly wheeled in for
> maintenance.
> 
> Thoughts?
> 
> Paul, W9AC
> 
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