My backstay is 13.7 meter long which puts limits to my isolated backstay, I thought to 12.5 meter as the 20 meter band will be my favourite band (mostly digital traffic with Pactor modem but also SSB operation on various sailors Pacific nets).
As counterpoise I plan to link my keel and diesel engine by wide (around 1 inch wide) flat copper ribbon to the FT897D tranceiver and the FC40 ATU. The keel is about 1.85 meter deep, made of steel covered by epoxy and weights about 1 300 kilograms, between 2 and 3 square meter area. I think this should work well by capacitive effect with the surrounding salt water, for the moment I do not intend to have a grounding brass plate outside but I can change my mind.
Any comments will be appreciated.
73s to all.
FK8IH
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--- In YaesuTuner@..., JD Baillie <tisvcs@...> wrote:
On my sailboat I have no idea what lenth the backstay was. Where I found a point that the system wouldn't tune I felt the problem was inadequate counterpoise inside the boat. Upgrading the counterpoise solved all tuning problems.
What do you plan to use for a counterpoise?
JD
