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Re: LF: Low frequency preselectors?

from [Roelof Bakker] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: Low frequency preselectors?
From: "Roelof Bakker" <[email protected]>
Date: Fri, 4 Sep 2009 21:17:16 +0200
In-reply-to: <E3BFD10D1AFC4EB4BF6D96C5068508CA@NIS942960248>
References: <[email protected]> <005701ca2707$438a4570$0301a8c0@mal769a60aa920> <[email protected]> <009c01ca2731$2d5e0e60$0301a8c0@mal769a60aa920> <[email protected]> <847F3A04E31C413A81AD022BDC11AD46@JimPC> <5CA746FC83614040A4C4D8B6F9F2519E@NIS942960248> <[email protected]> <op.uzp8ghv4yzqh0k@pc1> <E3BFD10D1AFC4EB4BF6D96C5068508CA@NIS942960248>
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Hello Jordan,

Regarding Q, I have used potcores, but this is not necessary at all.
Standard moulded rf chokes, those that look like resistors, give excellent
results.

I have found that the bandwidth can be so narrow that it was possible to
peak the individual sidebands of a 400 Hz modulated non directional beacon
at 400 kHz. as said before, decreasing the gain broadens the response to a
more practical bandwidth.

73,
Roelof Bakker, pa0rdt
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