I have lost too many preamps due to near-by lightning and static
discharge. After the last (expensive) MMIC failure, I have made a practice
of installing a resistor to return (chassis or "ground") across the input
coaxial connector. The value is anything over 10 kohms. The disturbance
to the 50-ohm impedance is completely negligible. The rule-of-thumb on the
resistor value is something over 10X the system impedance. I've even used
1k successfully. Go for it !!
Dave - WØLEV
On Fri, Sep 17, 2021 at 10:36 PM Dave <dave@nk7z.net> wrote:
> Hi,
>
> I am building a static bleed resistor, (5 Mohm), inserter, and want to
> place it on the transceiver output, not at the feedpoint of the antenna...
>
> I have not seen this done in this way before, which may indicate there
> is something bad about doing it this way...
>
> Does anyone know why this might be a bad idea, assuming I can maintain
> 50 ohms while adding 5 Mohms to ground off the center of the coax?
>
> --
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist, RFI
> ARRL Asst. Director, NW Division, Technical Resources
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>
--
*Dave - WØLEV*
*Just Let Darwin Work*
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