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Re: LF: BFQ19 SMT Collector pad

from [Roelof Bakker] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: BFQ19 SMT Collector pad
From: "Roelof Bakker" <[email protected]>
Date: Sun, 29 Apr 2012 16:20:16 +0200
In-reply-to: <1C53C5D0C2994BE792CED0AD217ADB76@lindavideo>
References: <28E264A70BC6433AB06D915D0EAFB8B9@AGB> <op.wdisxbkcyzqh0k@pc-roelof> <2BB37ECFB44044EFACB44777CD3A2963@AGB> <1C53C5D0C2994BE792CED0AD217ADB76@lindavideo>
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Hello Ken,


Can you remember the name of the web site where the layout was?, I did my
own layout but it was not all that successful when tested on 198kHz S/N
improved but no increase in level, although this may have been because I
wound two 20mH inductors for the power feed and may have been too greater
inter-winding capacitance, for use on VLF.


As the S/N ratio improved, I believe the antenna performed as it should.
For use from 20 kHz and up a 100 uH inductor is OK.
For 10 kHz and up, I use 1.2 mH
But this is not really critical.

73,
Roelof, pa0rdt
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