Good answer, Lloyd. One thing I did is put a small incandescent pilot lamp in series with my Beverages and my IC-765 transceiver's RX antenna input. The lamp functions as a current limiter and a fuse. After the lamp, there are back-to-back diodes to ground, which limit the maximum voltage in either polarity.
I learned this from W8JI. I used a 6.3 volt #47 lamp, but what Tom used drew less current at its rated voltage than my #47. He could even see it glow faintly from all the RF that his wideband Beverages were picking up. That lamp has never blown, but it gives me peace of mind knowing that it is helping to protect the front end from excessive RF or voltage pulses. 73, Mike W0BTU On Fri, Jan 17, 2020, 9:49 AM Lloyd - N9LB <lloydb...@tds.net> wrote: > That is too much RF power for a receiver input. > "Front End Protectors" are available for this exact problem: > > Array Solutions: > https://www.arraysolutions.com/as-rxfep > > DX Engineering: > https://www.dxengineering.com/parts/dxe-rg5000hd > > Miroslaw Paczocha wrote: > > I intend to connect a K9AY antenna to socket 3 of an FTDX101D, this socket > being menu configured as Rx input. The problem is I measured about 1,5 V on > the K9AY coax loaded with 50 ohms with 100W forwarded to the Tx antenna ... > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector