Re: question re: SB32 PNP (CT3600)

Posted on 2015-12-16, 09:53

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You need to reduce the waveform voltage by a factor of five and remove the DC bias. The solution with a voltage divider and transformer is by far the superior option. http://www.hardwarebook.info/S/PDIF_output

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Re: Best platform and games for GUS Max?

Posted on 2015-12-16, 09:44

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OMF was MOD based music. A GUS would be a great fit.

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Re: Do LEDs produce vibration when used with AC?

Posted on 2015-12-16, 09:34

by

by gdjacobs

in Milliways

in Milliways

It could be an indicator of bad things. Insufficient wiring insulation, incorrect isolation design if it's fed through a control or plug pack. If this happens on appliances or similar electrical apparatus, it's an indication of inadequate bonding to ground. Try plugging it into an RCD or GFCI outlet …

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Re: Pentium 166MMX tower of power

Posted on 2015-12-16, 06:56

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by gdjacobs

in Marvin \ System Specs

in Marvin \ System Specs

I just wish Creative provided a method of changing the soundfonts in DOS 😠

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Re: Capacitor replacement

Posted on 2015-12-16, 00:39

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Their iron? S390 / zSeries . The equation I used earlier as applied was for the equivalent circuit of a capacitor. - Just the cap. Inductors external to the cap as in a filter aren't part of it. Yes, they do use the same equation for filters but that isn't what that was. . It's the same for tuned …

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Re: Capacitor replacement

Posted on 2015-12-15, 12:06

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I think we're okay as long as we stick to filter design. That's all germane to capacitor selection. Some filters in the literature feature a series inductor between the switch converter and the Pi filter. The article in question is specifically regarding PSU construction by IBM for their iron.

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Re: Capacitor replacement

Posted on 2015-12-15, 08:18

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

But also more capacitance means smaller ripple voltage for same ripple current. Why? More capacitance takes more time to charge/discharge by same voltage amount at the same ripple current. So I do not agree on the part that where it was mentioned only lower ESR made something working, not more …

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Re: The Dark Eye(1995) run on DOSBox 0.74????

Posted on 2015-12-15, 03:01

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by gdjacobs

in DOSBox Games/Apps

in DOSBox Games/Apps

DOSBox does run Windows 3.1, but I doubt that's what a game from 1995 is asking for.

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Re: Capacitor replacement

Posted on 2015-12-15, 00:35

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As above, you will have superior ripple voltage characteristics and regulation before the application of the final shunt suppression caps on the DC output.

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Re: Capacitor replacement

Posted on 2015-12-15, 00:06

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This is why bulk caps are generally chosen with quite high impedance. They're used to source current when the switching caps are not in conduction, so they must have significant charge storage. However, designing a low pass filter with a high impedance does move the -3 dB point higher as well, so …

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Re: Old Hard Drives

Posted on 2015-12-14, 23:02

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

386SX wrote: Thank. How to know which kind of CF card I should buy without the removable trick? They are not that easy to find in shops lately. Indeed.

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Re: Old Hard Drives

Posted on 2015-12-14, 19:48

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Also, some CF cards are hard jumpered to appear as removable drives instead of fixed disks (hard drives) in Windows.

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Re: Tips for buying a CRT monitor for a mid-90s Pentium machine

Posted on 2015-12-14, 11:42

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You're talking about 256 colour games. There's lots of games which run at 640x400 or 640x480, 16 colour mode. Later DOS games (Crusader series, DN3D, Mech2) could run at high res, 256 colour.

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Re: Capacitor replacement

Posted on 2015-12-14, 10:58

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

To clarify for anyone watching, we're talking about filter applications here and not bulk caps. Correct, ripple is not controlled by the cap, but the manner of it's dissipation is. It's a complicated concept that I didn't want to explain in totality. We have to consider ESR, reactance of the cap (at …

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Re: Capacitor replacement

Posted on 2015-12-14, 05:55

by

by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As Bonez said, using a cap with higher breakdown potential will not improve capacitor life. All else being equal it's not a problem to use a cap with a higher voltage rating, but there is no substantive benefit once you're safely over the circuit maximum. Heat is the critical factor for capacitor …

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Re: Most disappointing games?

Posted on 2015-12-13, 11:29

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by gdjacobs

in Milliways

in Milliways

Being John Romero means never admitting you're wrong. http://www.tribalwar.com/forums/archive/t-525112.html (salient features mid-way down)

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Re: Most disappointing games?

Posted on 2015-12-12, 17:19

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by gdjacobs

in Milliways

in Milliways

Granted, this is my opinion. And to be fair, there are worse games out there. Unlike some, Daikatana is technically playable.

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Re: Most disappointing games?

Posted on 2015-12-12, 15:39

by

by gdjacobs

in Milliways

in Milliways

I find MacFarlane's version of satire to be extremely clunky, but that's hardly the point. The only way Daikatana is satire is if it's a story about an arrogant video game producer/writer's inflated sense of self importance manifesting in a game marred by awful mechanics, annoying stock characters, …

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Re: Most disappointing games?

Posted on 2015-12-12, 14:00

by

by gdjacobs

in Milliways

in Milliways

There were really only two things fundamentally wrong with Daikatana's original release - the sidekick AI and the limited saves. Of the two, I'd say the inability to save is worse, but the combination of the two is completely fatal. Once you do away with these two (by playing a patched version), …

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Re: Can't calibrate joystick in Wing Commander in DOS (not DOSBox)

Posted on 2015-12-12, 13:51

by

by gdjacobs

in DOS

in DOS

You can use SETMUL for further fine tuning by adjusting the K6-III+ clock multiplier in software.

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