Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]
<prev [Date] next>
[Advanced]
 <prev [Thread] next>

Re: LF: PA0RDT antenna near a TX? Front end OK?

from [Andy Talbot] [Permanent Link][Original]
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: PA0RDT antenna near a TX? Front end OK?
From: Andy Talbot <andy.g4jnt@gmail.com>
Date: Thu, 15 Oct 2015 18:29:11 +0100
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=ByseSV35zv4xG2n7Yq6T2/zkmZ43bcgbiYYcCdQFEAE=; b=j0BGEOfoWT9lDyMOHceG9csCcZhNDMLRwbelX2uzDWDgk3rTTjJIGG+0s/NxtMcEAe i56Vj2LV2K3xfN1MRu+KoqVAVFZcLD2uEgMwnhs8FLCMypd/Ibs0emuu/5MKZexjGZvl j1mWe8TTp1we2nQ0dr3+GEFMrxVUY7aB1EQu6m9ET8ShOq5VPHg8k304QzZ1b44Crv8i wUWCSQgsAw/40MfKy3SJFgOKRtHaZihR03d6inJajHlzIhYa9hZWSS9VWPDokn4T7H1I 83og6m/hxNhVf50Unn2fbqRPa8YljvxI3OtvfH6+H0hiH+sfyBYiFHCLr9gyfyRLKPTD aMfQ==
In-reply-to: <561FDEF7.2020503@charter.net>
References: <1821006912.20151014193718@chriswilson.tv> <BLU185-W43EB4895369A80C798BF34CF3F0@phx.gbl> <A1F434BCA1554D73B62CD8C5DA92018C@MichaelSappPC> <BLU403-EAS424A800C976444186257DE1CF3E0@phx.gbl> <D7C6DA4CB2A44BD7BCAA6CA222B95DDB@MichaelSappPC> <561FDEF7.2020503@charter.net>
Reply-to: rsgb_lf_group@blacksheep.org
Sender: owner-rsgb_lf_group@blacksheep.org
You could use a latching relay, and pulse the supply with reverse polarity to set teh input short. 
(Suitably protecting the preamp electronics with a diode)

'jnt

On 15 October 2015 at 18:14, John Andrews <w1tag@charter.net> wrote:
One trick that I have used on several preamps:

Put a small PC-mount relay (such as those used on telephone lines) at the front end of the preamp. Connect the 
 
 German ops who hang such electronics in distant tree-tops would probably not be interested.

John, W1TAG


[More with this subject...]
<Prev in Thread] Current Thread [Next in Thread>
Previous by Date:  Re: LF: PA0RDT antenna near a TX? Front end OK?, John Andrews
Next by Date:  Re[2]: LF: PA0RDT antenna near a TX? Front end OK?, Chris Wilson
Previous by Thread:  Re: LF: PA0RDT antenna near a TX? Front end OK?, John Andrews
Next by Thread:  Re[2]: LF: PA0RDT antenna near a TX? Front end OK?, Chris Wilson
Indexes:  [Date] [Thread] [Top] [All Lists]