Envelope-to: dave@picks.force9.co.uk Delivery-date: Fri, 20 Jan 2006 16:17:39 +0000 Received: by ptb-mxcore02.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1EzyxG-0008V7-6g for dave@picks.force9.co.uk; Fri, 20 Jan 2006 16:17:38 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (PlusNet MXCore v2.00) id 1EzyxF-0008Sc-SQ for dave@picks.force9.co.uk; Fri, 20 Jan 2006 16:17:37 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1EzywJ-00016m-6V for rs_out_1@blacksheep.org; Fri, 20 Jan 2006 16:16:39 +0000 Received: from [193.82.59.130] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1EzywI-00016d-LX for rsgb_lf_group@blacksheep.org; Fri, 20 Jan 2006 16:16:38 +0000 Received: from post-22.mail.nl.demon.net ([194.159.73.192]) by relay2.thorcom.net with esmtp (Exim 4.51) id 1EzzYI-00041D-Qk for rsgb_lf_group@blacksheep.org; Fri, 20 Jan 2006 16:55:56 +0000 Received: from ndb.demon.nl ([82.161.81.65]:21569 helo=pcroelof) by post-22.mail.nl.demon.net with smtp (Exim 4.51) id 1Ezyv1-0002Wr-82 for rsgb_lf_group@blacksheep.org; Fri, 20 Jan 2006 16:15:19 +0000 Message-ID: <007201c61ddc$b0d668d0$2101a8c0@pcroelof> From: "Roelof Bakker" 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> Date: Fri, 20 Jan 2006 17:15:12 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Subject: LF: Re: Re: Re: Mini Whip and local noise Content-Type: text/plain; charset=Windows-1252; format=flowed Content-Transfer-Encoding: 8bit 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) 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