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N_Cook <diverse@tcp.co.uk>: Mar 12 10:43AM On 12/03/2016 10:32, Gareth Magennis wrote:   > Cheers,   > Gareth.   I thought they'd been going the other way these days for elfin safety, statutory specification of sand filled fuse barrels and not air for mains ones anyway. Its not that much different to the deliberate necking of pcb power rail traces, to make sure any burn-ups occur in safeish areas, but how they guaranteee non-flamability of the underlaying polyester or overlaying conformal coating is a mystery still.

Reinhard Zwirner <reinhard.zwirner@t-online.de>: Mar 12 05:25PM +0100 Gareth Magennis schrieb: > Here's something I've not seen before.   > A Power Amplifier has binding posts which you are supposed to solder > wire between, instead of fuses. ...   Hi,   Metrix, a French manufacturer of multimeters, used this method (at least) in MX202 multimeter series.   <http://public.beuth-hochschule.de/hamann/telefon/mx202.html>   Best regards   Reinhard

"pfjw@aol.com" <pfjw@aol.com>: Mar 12 05:10AM -0800 On Friday, March 11, 2016 at 4:22:14 PM UTC-5, DaveC wrote: > belt in illustration above.)   > How does that result in the same tape speed in both directions?   > Confused...   The capstan is a passive device. The motor pulley diameter via the *pinch roller* determines the tape speed. The capstan wheel can be any size at all.   Peter Wieck Melrose Park, PA

MJC <gravity@mjcoon.plus.com>: Mar 12 02:44PM In article <83973214-241c-42fc-a32f-fbcd10ea0572@googlegroups.com>, pallison49@gmail.com says...   > ** You have completely forgotten the damping effect of side-ways pressure from the pinch roller.   > .... Phil   I certainly was not taking it into account. Probably because it is movement along the length of the tape and not sideways that gives rise to speed modulation at the pick-up.   Mike.

DaveC <not@home.cow>: Mar 12 08:13AM -0800 > Those things are turning in OPPOSITE directions   Yikes! You're right...   (op)

DaveC <not@home.cow>: Mar 12 08:16AM -0800 > The capstan is a passive device. The motor pulley diameter via the *pinch > roller* determines the tape speed. The capstan wheel can be any size at all.   By my mind that is backward: the pinch roller is passive (not being driven). The capstan shaft (~2mm diam) is driven by capstan flywheel/belt/motor pulley.   No?   Thanks.   (op)

N_Cook <diverse@tcp.co.uk>: Mar 12 12:31PM On 12/03/2016 11:39, Gareth Magennis wrote:   > That's not the Series/Parallel switch you are looking at?   > Gareth.   Not my intended meaning, only 4 terminals are used of the 6 , but not in a DPST sense as 2 of those 4 terminals are bridged across by a trace, so the action is just a simple SPST, via 2 switch contacts. So one pole on or off to simply switch in/out a filter cap or something

EdithLeman <EdithLeman.1128cf28@diybanter.com>: Mar 11 07:29PM +0100 'Cursitor Doom[_4_ Wrote:   > free to point it out. Otherwise I'll be opening it up to perform an > autopsy over the weekend. > Thanks again to everyone who tried to help.   Are you sure that you have not mixed up the windings? Maybe the two 1.8V windings are actually the 2 symmetrical "innermost" ones, the 3V ones are the "medium" ones and the 15V are the "outermost" windings? Your measured winding voltage ratios "1.8:3.0:13.0 volts" and the schematic output voltage ratios "6.7:13.4:60.7 volts" (I've added a little compensation for 0.7V silicon diodes) are (from a purely ratiometric point of view) not very far away from each other. In fact they are so close that the differences between the smaller ones can be easily explained by your measurement errors (how accurate was that 0.8V measurement anyway?) and the possibly intended uneven loading of the power rails in the scope.         -- EdithLeman

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