Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id w0R9mRnr011704 for ; Sat, 27 Jan 2018 10:48:29 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1efMyY-0002K9-UT for rs_out_1@blacksheep.org; Sat, 27 Jan 2018 09:40:42 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1efMyY-0002Jz-Ag for rsgb_lf_group@blacksheep.org; Sat, 27 Jan 2018 09:40:42 +0000 Received: from mout1.freenet.de ([2001:748:100:40::2:3]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1efMyU-0002Pp-NB for rsgb_lf_group@blacksheep.org; Sat, 27 Jan 2018 09:40:41 +0000 Received: from [195.4.92.140] (helo=mjail0.freenet.de) by mout1.freenet.de with esmtpa (ID dl4yhf@freenet.de) (port 25) (Exim 4.89 #1) id 1efMyQ-00007O-EB for rsgb_lf_group@blacksheep.org; Sat, 27 Jan 2018 10:40:34 +0100 Received: from [::1] (port=59096 helo=mjail0.freenet.de) by mjail0.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.89 #1) id 1efMyQ-000341-Au for rsgb_lf_group@blacksheep.org; Sat, 27 Jan 2018 10:40:34 +0100 Received: from mx17.freenet.de ([195.4.92.27]:59336) by mjail0.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.89 #1) id 1efMwN-0001eV-IH for rsgb_lf_group@blacksheep.org; Sat, 27 Jan 2018 10:38:27 +0100 Received: from dslb-188-108-200-187.188.108.pools.vodafone-ip.de ([188.108.200.187]:57302 helo=[192.168.178.26]) by mx17.freenet.de with esmtpsa (ID dl4yhf@freenet.de) (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (port 587) (Exim 4.89 #1) id 1efMwN-00081Z-Ak for rsgb_lf_group@blacksheep.org; Sat, 27 Jan 2018 10:38:27 +0100 To: rsgb_lf_group@blacksheep.org References: <78da90ad-a378-cbb6-3d11-12aa0e78567c@freenet.de> <5A672E4C.4030500@posteo.de> From: =?UTF-8?Q?Wolfgang_B=c3=bcscher?= Message-ID: <75a094b6-364b-fb67-f457-67188af5b8b1@freenet.de> Date: Sat, 27 Jan 2018 10:36:41 +0100 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2 MIME-Version: 1.0 In-Reply-To: <5A672E4C.4030500@posteo.de> Content-Language: en-US X-Originated-At: 188.108.200.187!57302 X-Spam-Score: -0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Stefan, Indeed - but for an existing design, the through-hole parts are favoured (just flip the JFET around if the pinout is Gate-Source-Drain instead of Drain-Source-Gate as for J310 vs BF245). In the meantime, one of my last J310's has been salvaged from a 70 cm RX preamp, and installed in VLF6. Hope it will pick up something below 1 kHz from you one fine day ;-) [...] Content analysis details: (-0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (dl4yhf[at]freenet.de) -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: a6b6ffaf48fdddf1ed5c25dc4bf03ee1 Subject: Re: LF: VLF6 (audio stream) temporarily off Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 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 Hi Stefan, Indeed - but for an existing design, the through-hole parts are favoured (just flip the JFET around if the pinout is Gate-Source-Drain instead of Drain-Source-Gate as for J310 vs BF245). In the meantime, one of my last J310's has been salvaged from a 70 cm RX preamp, and installed in VLF6. Hope it will pick up something below 1 kHz from you one fine day ;-) 73,   Wolf . On 23.01.2018 13:45, DK7FC wrote: > http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/J310.jpg > > They have been quite cheap ( ~ 0.6 EUR) just a few (< 5) years ago. > Now they are not available any more. Looks like it is good to invest > in such parts before they are not availble any more. > > On the other side, the SMD parts can be used as well, just a bit more > effort. Like the BF862, > http://www.iup.uni-heidelberg.de/schaefer_vlf/VLF/BF862.jpg > > 73, Stefan > > > Am 22.01.2018 18:08, schrieb Wolfgang Büscher: >> Greetings all, >> >> >> Storm "Friederike" has taken her toll - the enclosure of my VLF6 had >> a small crack, so water slowly crept in, which slowly killed the high >> impedance input. >> It's in for repair now. Hope the FETs survived - I'm slowly running >> out of stock of these ancient J310 devices. >> >> Hope to be back soon. >> Cheers, >>   Wolf DL4YHF . >> >