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Wond <lost@the.ether.net>: Jun 27 04:02PM My son has a new welder, spec'd 5% max THD input AC power. I see Keysight has a DMM with a "relative distortion" position. Anyone used one of these? Useful? Anyone have a favorite, or a simple method? Cheers

bruce bowser <bruce2bowser@gmail.com>: Jun 27 09:01AM -0700 > criterian like a minimum of 64 Gig of storage and 4 Gig of Ram etc to > run it, but most computers have those minimums anyway.   > https://www.bbc.co.uk/news/technology-57598554     Keep in mind that here are three major alternatives to Windows: Mac OS, Linux, and Chrome.

Phil Allison <pallison49@gmail.com>: Jun 26 07:56PM -0700 legg wrote: ===========   > >IME whenever such a chassis has a non conducting coating ( eg anodised Al or paint ) makers normally mask off any small areas that need to conduct. Not the case here.   > >I reckon the metal shop simply got batch of plated steel that look normal but was not correct. > >Nobody with a DMM being around to check it.   -------------------------------------------------------- > Doesn't look like the chassis is used to carry any signal > grounding - audio plug has plastic body.   ** Huh ???   The input jack sleeve is chassis grounded along with the common earth of the PCB.   https://www.thetubestore.com/lib/thetubestore/schematics/Fender/Fender-Blues-Junior-Schematic.pdf   The majority of guitar amps have plastics input jacks, nearly all Marshall and VOX models for example.     ....... Phil

legg <legg@nospam.magma.ca>: Jun 27 10:08AM -0400 On Sat, 26 Jun 2021 19:56:58 -0700 (PDT), Phil Allison   >https://www.thetubestore.com/lib/thetubestore/schematics/Fender/Fender-Blues-Junior-Schematic.pdf   >The majority of guitar amps have plastics input jacks, nearly all Marshall and VOX models for example.   >....... Phil   The mounting hardware for that jack is not counted on to make an electrical connection to signal ground.   This was something that you said you were worried about, when considering continuity of the box metalwork.   I think you'll find that PEM inserts have an electrical contact to the metalwork, even though installed after the metal is passivated. If the grounding stud is captive, it likely also benefits from this contact, though star washers are standard for a safety connection there, anyways.   RL

John Crane <john_crane_59@yahoo.com>: Jun 26 11:07PM -0500 Anybody know where to get these or can recommend a replacement? I can't even find it in my data books, so I don't know the specs.   It's in a late 1970's PC-100A thermal printer base for TI calculators.   -John

Sergey Kubushyn <ksi@koi8.net>: Jun 27 05:22AM > Anybody know where to get these or can recommend a replacement? > I can't even find it in my data books, so I don't know the specs.   > It's in a late 1970's PC-100A thermal printer base for TI calculators.   https://www.weisd.com/products/884837-pg1992-nte-equivalent-nte519-ultra-fast-switching   --- ****************************************************************** * KSI@home KOI8 Net < > The impossible we do immediately. * * Las Vegas NV, USA < > Miracles require 24-hour notice. * ******************************************************************

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