Envelope-to: dave@picks.force9.co.uk Delivery-date: Fri, 20 Jan 2006 22:25:44 +0000 Received: by ptb-mxcore02.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1F04hP-00052c-Tr for dave@picks.force9.co.uk; Fri, 20 Jan 2006 22:25:44 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (PlusNet MXCore v2.00) id 1F04hP-000500-OE for dave@picks.force9.co.uk; Fri, 20 Jan 2006 22:25:39 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1F04gi-0002SJ-SX for rs_out_1@blacksheep.org; Fri, 20 Jan 2006 22:24:56 +0000 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1F04gh-0002SA-TR for rsgb_lf_group@blacksheep.org; Fri, 20 Jan 2006 22:24:55 +0000 Received: from omc1-s25.bay6.hotmail.com ([65.54.248.227]) by relay2.thorcom.net with esmtp (Exim 4.51) id 1F05Io-0005h6-7z for rsgb_lf_group@blacksheep.org; Fri, 20 Jan 2006 23:04:21 +0000 Received: from hotmail.com ([65.54.173.53]) by omc1-s25.bay6.hotmail.com with Microsoft SMTPSVC(6.0.3790.211); Fri, 20 Jan 2006 14:24:46 -0800 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Fri, 20 Jan 2006 14:24:46 -0800 Message-ID: Received: from 71.37.244.7 by BAY5-DAV23.phx.gbl with DAV; Fri, 20 Jan 2006 22:24:45 +0000 X-Originating-IP: [71.37.244.7] X-Originating-Email: [we0h1@msn.com] X-Sender: we0h1@msn.com From: "MIKE REID" To: rsgb_lf_group@blacksheep.org References: <016101c61d02$12ceca40$2101a8c0@pcroelof> <43CFCE5D.5000504@usa.net> <20060119232216.u1kyilxv57r4scgg@webmail.versatel.de> <43D0258B.2000601@usa.net> <000901c61dac$20298450$ee9bfea9@oben> <007201c61ddc$b0d668d0$2101a8c0@pcroelof> Date: Fri, 20 Jan 2006 16:24:45 -0600 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: MSN 9 X-MimeOLE: Produced By MSN MimeOLE V9.10.0011.1703 Seal-Send-Time: Fri, 20 Jan 2006 16:24:45 -0600 X-OriginalArrivalTime: 20 Jan 2006 22:24:46.0026 (UTC) FILETIME=[516102A0:01C61E10] Subject: LF: Re: Mini Whip and local noise Content-Type: text/html; charset=windows-1252 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SpamFiltered: by PlusNet MXCore (v2.00) Content-transfer-encoding: 8bit
I have samples of the 2N5109 on their way here.
http://www.microsemi.com/catalog/part.asp?ID=18715
That's the link to the manufacturer's webpage where they offer free samples. The J310 is also a free sample from Fairchild Semiconductors.
 
Mike
WE0H
WD2XGI
 
----- Original Message -----
From: Roelof Bakker
Sent: Friday, January 20, 2006 10:15 AM
Subject: LF: Re: Re: Re: Mini Whip and local noise

Hello Peter and all,

It seems that this transistor is no longer available. However, there is no
real need for it as the J310 has been tested for IP2 and IP3 in the same
test setup. At 12 V and a bias current of 10 mA the J310 has a IP2 of + 69
dBm and a IP3 of + 33.5 dBm, 1 dB compression point is in excess of + 22
dBm.

Computer simulation of the J310 has confirmed these figures (or should I say
vice versa?) Though the active device is important in a whip design, it is
only part of a system. There is not much use to put much effort into
acchieving the best possible performance, when this is not necessary for the
reception system as a whole.

73 Roelof Bakker, pa0rdt