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Re: LF: Re: Power experiment / Mini Whip / 8970 Hz !

To: [email protected]
Subject: Re: LF: Re: Power experiment / Mini Whip / 8970 Hz !
From: pa3abk <[email protected]>
Date: Mon, 26 Mar 2012 19:45:06 +0200
In-reply-to: <C6155D5ADA2246218DFC5ED73967F826@Extensa>
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Peter,

It's a known problem also here.
There are several ways to prevent that noise slip into the DC feederlines.
Assume that every situation will be different for each of us, depending the source of the interferrence.

Dallas Lankford wrote a small article about this in the past.
Maybe it has some idea's to get things under control at your end.

http://antenadx.com.br/PDF/Antenas%20ativas/LowNoiseActiveAntennasAC-DCPowerSuppliesII.pdf

Dallas is more focussed on MW, but some of his articles are useable on LF.
Initally those files were stored on kongsfjord.no but for some reason they moved to "somewhere" in the Yahoo groups. Which explains the strange internet location: somewhere in Brazil. It was the best my friend Google could provide at the moment.

Jan/pa3abk




On 26-3-2012 7:40, PA1SDB, Peter wrote:
Hello Roelof, VLF, LF, but also HF, VHF, UHF and SHF :-)
Today I will try to ad some stabilyzers, filters, C's and Choces at the powers supply Mini Whip input.

That single 9 volt battery block was empty after 12 hours.
It did drop from 9.4 to 7.3 in 12 h.
A bit expensive to buy 2x 9v batery's a day :-)

73's Peter, PA1SDB

http://www.qsl.net/pa1sdb/





--
pa3abk<->  dordrecht jo21it



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