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Date: Thu, 30 Dec 2010 04:16:43 -0800 (PST)
From: Daniele Tincani <danieletincani@yahoo.com>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: DK7FC's VLF Active Antenna
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Hello Ken,
I bought the BF862's at RS Italy. The sell them in 10x=A0strips. May be yo=
u could=20
try and see if RS UK have the same policy.
Best regards
Daniele




________________________________
From: Ken <ken.h.wright@btinternet.com>
To: rsgb_lf_group@blacksheep.org
Sent: Thu, December 30, 2010 11:24:00 AM
Subject: Re: LF: DK7FC's VLF Active Antenna


Hi Stefan and all others.
Thank you for your most useful replies, the reasons I asked this question=
 are as=20
follows, firstly I was hoping to construct one this weekend possibly from=
=20
components in my stock, a quick search on Google=A0for UK suppliers came=
 up with=20
Farnell and RS, phoned Farnell and was informed yes I could purchase but=
 there=20
is a minimum=A0 order policy of =A320 which equates to about 50=A0 BF862s,=
 I assume=20
that RS is the same, I also looked on Ebay non were found. If anyone knows=
 of a=20
UK supplier where I could purchase say 10 ff I would be grateful.
=A0
73s
Ken
M0KHW
----- Original Message -----=20
>From: Stefan Sch=E4fer=20
>To: rsgb_lf_group@blacksheep.org=20
>Sent: Wednesday, December 29, 2010 6:16 PM
>Subject: Re: LF: DK7FC's VLF Active Antenna
>
>Hi Ken,=20
>
>I have not tested other JFETs so far. Is it just because of the SMD housi=
ng? I=20
>don't use a SMD PCB but a "free air" soldering. So if this is the problem=
, just=20
>solder the FETs legs directly on the next part, e.g. solder the drain dir=
ectly=20
>on the 390 Ohm resistor. Attached you find a picture that shows how my cu=
rrent=20
>used VLF grabber antenna looks inside. Don't be shocked ;-)
>
>If you anyway want an alternative, the J310 or the (2SK170) should be pos=
sible.=20
>There are some parameters like the noise and the gain and the input capac=
itance=20
>which are affecting the performance but this is all not so critical on VL=
F.
>
>73, Stefan/DK7FC
>
>
>
>Am 29.12.2010 17:58, schrieb Ken:=20
>Stefan.
>>Could you please recommend an equivalent to to BF862 which is not Surfac=
e Mount=20
>>for use in this circuit.
>>73s
>>Ken
>>M0KHW


     =20

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<html><head><style type=3D"text/css"><!-- DIV {margin:0px;} --></style></h=
ead><body><div style=3D"font-family:arial, helvetica, sans-serif;font-size=
:10pt"><DIV>Hello Ken,</DIV>
<DIV>I bought the BF862's at RS Italy. The sell them in 10x&nbsp;strips.=
 May be you could try and see if RS UK have the same policy.</DIV>
<DIV>Best regards</DIV>
<DIV>Daniele</DIV>
<DIV>&nbsp;</DIV>
<DIV style=3D"FONT-FAMILY: arial, helvetica, sans-serif; FONT-SIZE: 10pt">=
<BR>
<DIV style=3D"FONT-FAMILY: times new roman, new york, times, serif; FONT-S=
IZE: 12pt"><FONT size=3D2 face=3DTahoma>
<HR SIZE=3D1>
<B><SPAN style=3D"FONT-WEIGHT: bold">From:</SPAN></B> Ken &lt;ken.h.wright=
@btinternet.com&gt;<BR><B><SPAN style=3D"FONT-WEIGHT: bold">To:</SPAN></B>=
 rsgb_lf_group@blacksheep.org<BR><B><SPAN style=3D"FONT-WEIGHT: bold">Sent=
:</SPAN></B> Thu, December 30, 2010 11:24:00 AM<BR><B><SPAN style=3D"FONT-=
WEIGHT: bold">Subject:</SPAN></B> Re: LF: DK7FC's VLF Active Antenna<BR></=
FONT><BR>
<META content=3Doff http-equiv=3Dx-dns-prefetch-control>
<DIV><FONT size=3D2 face=3DArial>Hi Stefan and all others.</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Thank you for your most useful replies,=
 the reasons I asked this question are as follows, firstly I was hoping to=
 construct one this weekend possibly from components in my stock, a quick=
 search on Google&nbsp;for UK suppliers came up with Farnell and RS, phone=
d Farnell and was informed yes I could purchase but there is a minimum&nbs=
p; order policy of =A320 which equates to about 50&nbsp; BF862s, I assume=
 that RS is the same, I also looked on Ebay non were found. If anyone know=
s of a UK supplier where I could purchase say 10 ff I would be grateful.</=
FONT></DIV>
<DIV><FONT size=3D2 face=3DArial></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2 face=3DArial>73s</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Ken</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>M0KHW</FONT></DIV>
<BLOCKQUOTE style=3D"BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PA=
DDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px" dir=3Dltr>
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style=3D"FONT: 10pt arial; BACKGROUND: #e4e4e4"><B>From:</B> <A title=
=3Dschaefer@iup.uni-heidelberg.de href=3D"mailto:schaefer@iup.uni-heidelbe=
rg.de" rel=3Dnofollow target=3D_blank ymailto=3D"mailto:schaefer@iup.uni-h=
eidelberg.de">Stefan Sch=E4fer</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A title=3Drsgb_lf_group@blacks=
heep.org href=3D"mailto:rsgb_lf_group@blacksheep.org" rel=3Dnofollow targe=
t=3D_blank ymailto=3D"mailto:rsgb_lf_group@blacksheep.org">rsgb_lf_group@b=
lacksheep.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Wednesday, December 29, 2010=
 6:16 PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: LF: DK7FC's VLF Active=
 Antenna</DIV>
<DIV><BR></DIV>Hi Ken, <BR><BR>I have not tested other JFETs so far. Is it=
 just because of the SMD housing? I don't use a SMD PCB but a "free air"=
 soldering. So if this is the problem, just solder the FETs legs directly=
 on the next part, e.g. solder the drain directly on the 390 Ohm resistor.=
 Attached you find a picture that shows how my current used VLF grabber an=
tenna looks inside. Don't be shocked ;-)<BR><BR>If you anyway want an alte=
rnative, the <U>J310</U> or the (2SK170) should be possible. There are som=
e parameters like the noise and the gain and the input capacitance which=
 are affecting the performance but this is all not so critical on VLF.<BR>=
<BR>73, Stefan/DK7FC<BR><BR><BR><BR>Am 29.12.2010 17:58, schrieb Ken:=20
<BLOCKQUOTE type=3D"cite">
<STYLE></STYLE>

<DIV><FONT size=3D2 face=3DArial>Stefan.</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Could you please recommend an equivalent=
 to to BF862 which is not Surface Mount for use in this circuit.</FONT></D=
IV>
<DIV><FONT size=3D2 face=3DArial>73s</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>Ken</FONT></DIV>
<DIV><FONT size=3D2 face=3DArial>M0KHW</FONT></DIV></BLOCKQUOTE></BLOCKQUO=
TE>
<META content=3Don http-equiv=3Dx-dns-prefetch-control></DIV></DIV></div><=
br>

      </body></html>

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