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 w3BB0tQ6030411 for ; Wed, 11 Apr 2018 13:00:58 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1f6DPA-0000wH-MU for rs_out_1@blacksheep.org; Wed, 11 Apr 2018 11:55:08 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1f6DP5-0000w6-HI for rsgb_lf_group@blacksheep.org; Wed, 11 Apr 2018 11:55:03 +0100 Received: from resqmta-ch2-09v.sys.comcast.net ([2001:558:fe21:29:69:252:207:41]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1f6DP0-0006Lk-9W for rsgb_lf_group@blacksheep.org; Wed, 11 Apr 2018 11:55:01 +0100 Received: from resomta-ch2-06v.sys.comcast.net ([69.252.207.102]) by resqmta-ch2-09v.sys.comcast.net with ESMTP id 6DOvfRVFhbSy86DOvf2k6D; Wed, 11 Apr 2018 10:54:53 +0000 X-DKIM-Result: Domain=comcast.net Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20161114; t=1523444093; bh=8poTPQbGkLs3nvL8kM0ZXTtenfDCIxQMkTRlncp0GGg=; h=Received:Received:From:Subject:To:Content-Type:MIME-Version:Date: Message-ID; b=XP5lW9DSTy946gUycveEOHIr4Q7JIGo1x1GDCxI2PK8X3aT0ENZU9PP4tp9yIMV7v YKPo52bT15ftmA8uH0ytEjpo9Sgow7ir+6kEbvmB/k4A85U06tJ2jtXGoB7xF/ESnA KGjblsTa2ntPnsOpOF3TpN6JPX7oQT6+dbQl4WouEynpgW8kCBL6yBPqfy/Xu5WI6x oe9/+RBi2fS0QJ5B73cgf9j5ItXt2X4aIsjmgy75hTe7kYZmvxvshUKE53bkrTHmC6 dp0dLfBAlIz8wkgLvn6Nr4ojriUlni9fer7uCgmHSdS9VeqsWA2vNgKZ4I5hqKrz6U PitT5n7/vyj8A== Received: from Optiplex980-PC ([73.4.253.141]) by resomta-ch2-06v.sys.comcast.net with SMTP id 6DOufotpX7fYm6DOuf6qEP; Wed, 11 Apr 2018 10:54:53 +0000 From: "jrusgrove@comcast.net" To: "rsgb_lf_group@blacksheep.org" MIME-Version: 1.0 References: <1UQRRBrZ33.5N62o0UWd72@optiplex980-pc> <5a4a2419-c192-d615-4ad2-bc6bd3f576ec@n1bug.com> Date: Wed, 11 Apr 2018 06:54:51 -0400 Message-ID: <1UQRS7hUUP.4XeOGcYqkSd@optiplex980-pc> In-Reply-To: <5a4a2419-c192-d615-4ad2-bc6bd3f576ec@n1bug.com> User-Agent: OEClassic/2.7 (Win7; P; 2017-02-12) X-Mailer: OEClassic/2.7 (Win7; P; 2017-02-12) X-CMAE-Envelope: MS4wfP2XUC87tin6h9U3zxYNOECBW0SgVQP/Y63VuJHDTQVcLKD8e591yBqVTAae7CbK1f+M9/dznE2fJAEsAAPAotgLwPK2swk+H4mMk6AoNIC1zdaU7vtZ CfWB7/52QX27o2QRtOdHp30Qto4J2BQnSrQokshGp/Bp5gZfffvRvZzW6Ac8zUmQJPpZBCPQ/WZwfQ== X-Spam-Score: 0.8 (/) 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: Paul The 1000 pF caps I used are mylar ... suitable for timing applications. Ceramic caps, if that's what you're using (sounds like it might be since they're Kemet), have rather poor value tolerance, value stability and temperature stability by comparison. Think I may have some extras that can be dropped in the mail today ... just say the word. If the resistors are cheap chinese you may want to actually measure them ... if you haven't already. Over time, the paint color difference between red and orange may not be so obvious. Been bit by that here ... more than once. [...] Content analysis details: (0.8 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (jrusgrove[at]comcast.net) 0.0 HTML_MESSAGE BODY: HTML included in message 0.6 URIBL_SBL Contains an URL's NS IP listed in the Spamhaus SBL blocklist [URIs: www.n1bug.com] 0.1 URIBL_SBL_A Contains URL's A record listed in the Spamhaus SBL blocklist [URIs: www.n1bug.com] 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 131286aabc28dd54c072e5e89638c651 Subject: Re: LF: W1VD amp help - more waveforms Content-Type: multipart/alternative; boundary="Ad9eujRRaXyKr=_5idLnm3UYEuEZyV7idn" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE, TO_ADDRESS_EQ_REAL 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 This is a multi-part message in MIME format --Ad9eujRRaXyKr=_5idLnm3UYEuEZyV7idn Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Paul The 1000 pF caps I used are mylar ... suitable for timing applications= =2E Ceramic=20 caps, if that's what you're using (sounds like it might be since=20 they're Kemet), have rather poor value tolerance, value stability and = temperature stability by comparison. Think I may have some extras that= can be dropped in the mail today ... just say the word. If the resist= ors are cheap chinese you may want to actually measure them ... if you= haven't=20 already. Over time, the paint color difference between red and orange = may not=20 be so obvious. Been bit by that here ... more than once. Jay W1VD ----- Original Message ----- From: N1BUG Reply-To: To: Sent: 4/10/2018 9:36:57 PM Subject: Re: Fw: LF: W1VD amp help - more waveforms Aha! Jay See! Mine are *not* the same. In yours, one phase drops all the way down,=20 there's a slight dead zone, then the other starts coming up. In mine, one is still on its way down when the other starts up. If it's=20 not an absolute red flag, it sure raises questions in my mind. Gates with Vdd off: http://www.n1bug.com/gates-10.jpg http://www.n1bug.com/gates-11.jpg Resistors and caps verified, caps by marking only since I=20 can't measure them. New KEMET caps purchased from Mouser for this project. Other curiosities might be that my gate rise time is slower than yours and the little 'bobble' seems to occur at a lower voltage. Paul On 04/10/2018 09:08 PM, jrusgrove@comcast.net wrote: > Paul > =20 > Corrected links below. > =20 > www.w1vd.com/FETgate1.jpg > =20 > www.w1vd.com/FETgate2.jpg > =20 > Jay W1VD --Ad9eujRRaXyKr=_5idLnm3UYEuEZyV7idn Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Paul
 
The 1000 pF caps I used are mylar ... suitable for timing applica= tions. Ceramic caps, if that's what you're using (sounds like it might= be since they're Kemet), have rather poor value tolerance, value stab= ility and temperature stability by comparison. Think I may have s= ome extras that can be dropped in the mail today ... just say the= word. If the resistors are cheap chinese you may want to actually mea= sure them ... if you haven't already. Over time, the paint color diffe= rence between red and orange may not be so obvious. Been bit by that h= ere ... more than once.
 
Jay W1VD
 
 
----- Original Message -----
From: N1BUG <paul@n1b= ug.com>
Sent: 4/10/2018 9:36:57 PM
Subject: Re: Fw: LF: W1VD amp help - more waveforms
Aha! Jay

See! Mine are *not* the same. In yours, one phase drop= s all the way
down, there's a slight dead zone, then the other star= ts coming up.
In mine, one is still on its way down when the other = starts up. If
it's not an absolute red flag, it sure raises questio= ns in my mind.

Gates with Vdd off:

http://www.n1bug.com/gates-10.jpg
http://www.n1bug.com/g= ates-11.jpg

Resistors and caps verified, caps by marking on= ly since I can't
measure them. New KEMET caps purchased from Mouser= for this project.

Other curiosities might be that my gate rise= time is slower than
yours and the little 'bobble' seems to occur a= t a lower voltage.

Paul



On 04/10/2018 09:08 PM, = jrusgrove@comcast.net wro= te:
> Paul
>  
> Corrected links below.
>=  
> www.w1vd.= com/FETgate1.jpg <= http://www.w1vd.com/FETgate1.jpg>
>  
> www.w1vd.com/FETgate2.jpg &= lt;http://www.w1vd.com/FE= Tgate2.jpg>
>  
> Jay W1VD
--Ad9eujRRaXyKr=_5idLnm3UYEuEZyV7idn--