Re: Feed horn drain hole

Gary M1EGI

The Kapton technique is also used on professional LNBs...

Please see attached photo of one of mine, this is brand new and came with the polyimide already in place.

73 Gary M1EGI

On Sat, 16 May 2020, 12:33 Dominique Dehays, <f6dro@...> wrote:
Hi all,

Just use extruded polystyrene (styrodur) , u can find in any supplier, it's cheap and easy to glue.
I use it on all my horns up to 47GHz.There is no influence on RF.Sun noise measurement validated.

-------- Message d'origine --------
De : g4cch_1 <g4cch_1@...>
Date : 16/05/2020 13:12 (GMT+01:00)
Objet : Re: [UKMicrowaves] Feed horn drain hole

You might try sticking Kapton tape over the mouth of the feed to stop rain getting into the horn. Apparently this is ok at 3cm. CT1BYM and few others are using it

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