Return-Path: Received: (qmail 18890 invoked from network); 16 Aug 2003 18:26:42 -0000 Received: from netmail01.services.quay.plus.net (212.159.14.219) by netmail00.services.quay.plus.net with SMTP; 16 Aug 2003 18:26:42 -0000 Received: (qmail 10184 invoked by uid 10001); 16 Aug 2003 18:26:42 -0000 Received: from post.thorcom.com (193.82.116.70) by netmail01.services.quay.plus.net with SMTP; 16 Aug 2003 18:26:41 -0000 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.14) id 19o5kK-0004fj-6s for rsgb_lf_group-outgoing@blacksheep.org; Sat, 16 Aug 2003 19:25:48 +0100 Received: from [62.253.164.41] (helo=mta1-svc.business.ntl.com) by post.thorcom.com with esmtp (Exim 4.14) id 19o5kB-0004fa-9N for rsgb_lf_group@blacksheep.org; Sat, 16 Aug 2003 19:25:39 +0100 Received: from p4o2b7 ([62.252.205.41]) by mta1-svc.business.ntl.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with SMTP id <20030816182538.IIAQ27989.mta1-svc.business.ntl.com@p4o2b7> for ; Sat, 16 Aug 2003 19:25:38 +0100 Message-ID: <000001c3641b$94be4d20$5967fea9@p4o2b7> From: "Ian Kyle" To: rsgb_lf_group@blacksheep.org References: <5.1.0.14.0.20030815154505.00b0a898@gemini.herts.ac.uk> Date: Sat, 16 Aug 2003 18:25:09 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Subject: Re: LF: Variegated witterings. Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=-0.5 required=5.0tests=REFERENCESversion=2.55 X-Spam-Checker-Version: SpamAssassin 2.55 (1.174.2.19-2003-05-19-exp) X-SA-Exim-Scanned: Yes Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rsgb_lf_group-outgoing@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Hi Jim; thanks for the reply to the moan. Today I had another go at the mods to the BK - with the same result. Working into a 4.7 Ohm resistor load, and driven into saturation, the waveform across the load is of a non-fuzzy, triangular - going - on - sawtooth, profile with a crossover pimple and a p -p value of only 30 V. and the current drawn by the o/p devices is pretty well balanced at about 400mA each leg at Vcc so SOMETHING is limiting the drive. I left the 39 Ohm resistors in cct and went back from 1k2 to the 4k7 originals, whereupon the o/p figures returned to normal. This afternoon I installed four Vero pins to allow rapid changes of the source resistors but it will be a day or two before I am able to fiddle about and see what happens with different values. Thanks ffor the help. Ian