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Simple DC Converter Boost

Try this simple boost circuit. 15Vin to 300Vdc out

Version 4 SHEET 1 3300 2452 WIRE 2480 1440 2288 1440 WIRE 2528 1440 2480 1440 WIRE 2640 1440 2592 1440 WIRE 2752 1440 2640 1440 WIRE 2640 1456 2640 1440 WIRE 2288 1472 2288 1440 WIRE 2480 1472 2480 1440 WIRE 1584 1504 1472 1504 WIRE 1632 1504 1584 1504 WIRE 1712 1504 1632 1504 WIRE 1872 1504 1712 1504 WIRE 1472 1520 1472 1504 WIRE 1632 1520 1632 1504 WIRE 1872 1520 1872 1504 WIRE 2752 1520 2752 1440 WIRE 1712 1584 1712 1504 WIRE 1728 1584 1712 1584 WIRE 2032 1584 2016 1584 WIRE 2112 1584 2032 1584 WIRE 2288 1584 2288 1536 WIRE 2288 1584 2192 1584 WIRE 2352 1584 2288 1584 WIRE 2480 1584 2480 1536 WIRE 2480 1584 2416 1584 WIRE 2592 1584 2480 1584 WIRE 2640 1584 2640 1520 WIRE 2640 1584 2592 1584 WIRE 1472 1616 1472 1600 WIRE 1632 1616 1632 1584 WIRE 2640 1632 2640 1584 WIRE 2032 1648 2032 1584 WIRE 2224 1648 2032 1648 WIRE 2288 1648 2288 1584 WIRE 1728 1680 1712 1680 WIRE 2176 1680 2016 1680 WIRE 2480 1680 2480 1664 WIRE 2480 1680 2464 1680 WIRE 2480 1696 2480 1680 WIRE 2224 1728 2224 1648 WIRE 2240 1728 2224 1728 WIRE 2640 1728 2640 1696 WIRE 1648 1776 1632 1776 WIRE 1728 1776 1712 1776 WIRE 2032 1776 2016 1776 WIRE 2128 1776 2112 1776 WIRE 2480 1792 2480 1776 WIRE 1824 1856 1824 1840 WIRE 1920 1856 1920 1840 WIRE 2176 1856 2176 1680 WIRE 2464 1856 2464 1680 WIRE 2464 1856 2176 1856 WIRE 1584 1888 1584 1504 WIRE 2128 1888 2128 1776 WIRE 2128 1888 1584 1888 FLAG 1920 1856 0 FLAG 1824 1856 0 FLAG 1472 1616 0 FLAG 2480 1792 0 FLAG 2640 1728 0 FLAG 2592 1584 OUT FLAG 1632 1616 0 FLAG 1472 1504 IN FLAG 1712 1680 0 FLAG 1632 1776 0 FLAG 2288 1744 0 FLAG 2288 1584 SW1 FLAG 2640 1440 O2X FLAG 2752 1600 0 SYMBOL ind 2096 1600 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1

SYMBOL RES 2464 1568 R0 WINDOW 3 34 76 Left 2 SYMATTR Value 150K SYMATTR InstName R1 SYMBOL VOLTAGE 1472 1504 R0 WINDOW 3 27 94 Left 2 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR Value 15 SYMATTR InstName V1 SYMBOL res 2464 1680 R0 SYMATTR InstName R2 SYMATTR Value 600 SYMBOL cap 2624 1632 R0 WINDOW 3 23 56 Left 2 SYMATTR Value 5n SYMATTR InstName C1 SYMBOL cap 1616 1520 R0 WINDOW 40 24 92 Left 2 SYMATTR InstName C3

SYMBOL cap 1712 1760 R90 WINDOW 0 0 32 VBottom 2 WINDOW 3 32 32 VTop 2 SYMATTR InstName C7

SYMBOL res 2128 1760 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R5 SYMATTR Value 100K SYMBOL LTC3621 1872 1680 R0 SYMATTR InstName U1 SYMBOL nmos 2240 1648 R0 SYMATTR InstName M1 SYMATTR Value FDB33N25 SYMBOL diode 2352 1568 M90 WINDOW 0 0 32 VBottom 2 WINDOW 3 18 28 VTop 2 SYMATTR InstName D2 SYMATTR Value MUR460 SYMBOL diode 2496 1536 R180 WINDOW 0 24 64 Left 2 WINDOW 3 40 30 Left 2 SYMATTR InstName D1 SYMATTR Value MUR460 SYMBOL diode 2528 1456 R270 WINDOW 0 32 32 VTop 2 WINDOW 3 -5 34 VBottom 2 SYMATTR InstName D3 SYMATTR Value MUR460 SYMBOL cap 2272 1472 R0 SYMATTR InstName C2 SYMATTR Value 5n SYMBOL cap 2624 1456 R0 SYMATTR InstName C4 SYMATTR Value 5n SYMBOL res 2736 1504 R0 SYMATTR InstName R3 SYMATTR Value 20K TEXT 2232 1872 Left 2 !.tran 1.0m startup TEXT 1904 1408 Bottom 2 ;LTC3621 - Monolithic Synchronous Buck Regulator\nInput: 2.7V to 17V Output: 1.2V @ 1A, Fsw = 1MHz TEXT 2344 1952 Left 2 ;15V to 300Vdc Harry d. 17/Jly/15

Enjoy, Harry

Reply to
Harry D
Loading thread data ...

On Sat, 18 Jul 2015 15:25:02 -0700, "Harry D" wrote:

This is similar, but I used more multiplier stages and a 2-winding inductor to get to 1200 volts out. Well, the customer now wants 1400.

Your circuit has a lot of ripple from subharmonic oscillation. I added the slope compensation (R7 below) to mine and it really cleaned things up.

Version 4 SHEET 1 2184 704 WIRE 1248 -608 1184 -608 WIRE 1376 -608 1312 -608 WIRE 1440 -608 1376 -608 WIRE 1568 -608 1504 -608 WIRE 1376 -576 1376 -608 WIRE 1024 -432 944 -432 WIRE 1184 -432 1184 -608 WIRE 1184 -432 1088 -432 WIRE 1248 -432 1184 -432 WIRE 1344 -432 1312 -432 WIRE 1376 -432 1376 -512 WIRE 1376 -432 1344 -432 WIRE 1440 -432 1376 -432 WIRE 1568 -432 1568 -608 WIRE 1568 -432 1504 -432 WIRE 1184 -400 1184 -432 WIRE 1376 -400 1376 -432 WIRE 784 -272 720 -272 WIRE 944 -272 944 -432 WIRE 944 -272 848 -272 WIRE 1040 -272 944 -272 WIRE 1184 -272 1184 -336 WIRE 1184 -272 1104 -272 WIRE 1248 -272 1184 -272 WIRE 1376 -272 1376 -336 WIRE 1376 -272 1248 -272 WIRE 1568 -272 1568 -432 WIRE 1568 -272 1520 -272 WIRE 1184 -240 1184 -272 WIRE 1568 -240 1568 -272 WIRE 944 -224 944 -272 WIRE 0 -208 -96 -208 WIRE 144 -208 64 -208 WIRE -96 -112 -96 -208 WIRE -16 -112 -96 -112 WIRE 144 -112 144 -208 WIRE 144 -112 64 -112 WIRE 240 -112 144 -112 WIRE 288 -112 240 -112 WIRE 496 -112 288 -112 WIRE 720 -112 720 -272 WIRE 720 -112 576 -112 WIRE 784 -112 720 -112 WIRE 944 -112 944 -160 WIRE 944 -112 848 -112 WIRE 1088 -112 944 -112 WIRE 1184 -112 1184 -176 WIRE 1184 -112 1088 -112 WIRE 1264 -112 1184 -112 WIRE 1312 -112 1264 -112 WIRE 1568 -112 1568 -160 WIRE 288 -64 288 -112 WIRE 496 -64 496 -112 WIRE 576 -64 576 -112 WIRE -96 -48 -96 -112 WIRE 144 -48 144 -112 WIRE 1088 -32 1088 -112 WIRE 1184 -32 1184 -112 WIRE -96 64 -96 32 WIRE -16 64 -96 64 WIRE 144 64 144 32 WIRE 144 64 48 64 WIRE 288 64 288 0 WIRE 336 64 288 64 WIRE 496 64 496 16 WIRE 496 64 416 64 WIRE 576 64 576 16 WIRE 576 64 496 64 WIRE 624 64 576 64 WIRE 656 64 624 64 WIRE 1088 96 1088 32 WIRE 1184 96 1184 48 WIRE -96 112 -96 64 WIRE 576 112 576 64 WIRE 944 112 944 -112 WIRE 144 144 144 64 WIRE 352 192 272 192 WIRE 480 192 432 192 WIRE 528 192 480 192 WIRE 944 240 944 192 WIRE 944 240 720 240 WIRE 16 256 -96 256 WIRE 352 256 272 256 WIRE 480 256 432 256 WIRE 576 256 576 208 WIRE 576 256 480 256 WIRE 576 288 576 256 WIRE -96 304 -96 256 WIRE 944 304 944 240 WIRE 304 320 272 320 WIRE 576 400 576 368 WIRE -96 416 -96 368 WIRE -16 416 -96 416 WIRE 144 416 144 368 WIRE 144 416 64 416 WIRE 944 432 944 384 WIRE 304 448 304 320 WIRE 480 448 304 448 WIRE 720 448 720 240 WIRE 720 448 480 448 WIRE 144 464 144 416 FLAG 144 464 0 FLAG 576 400 0 FLAG 1088 96 0 FLAG 1184 96 0 FLAG 1264 -112 HV1 FLAG 944 432 0 FLAG 240 -112 IN FLAG -96 112 0 FLAG 1568 -112 0 FLAG 1248 -272 HV2 FLAG 1344 -432 HV3 FLAG 1520 -272 HV4 FLAG 624 64 QD FLAG 480 192 QG FLAG 480 256 QS FLAG 480 448 FB SYMBOL PowerProducts\\LTC3803 144 256 R0 SYMATTR InstName U1 SYMBOL ind2 480 -80 R0 WINDOW 0 -17 36 Right 2 WINDOW 3 -8 71 Right 2 SYMATTR InstName L1

SYMATTR Type ind SYMATTR SpiceLine Ipk=3.0 Rser=0.01 Cpar=1pF SYMBOL ind2 592 32 R180 WINDOW 0 -22 77 Right 2 WINDOW 3 -12 42 Right 2 SYMATTR InstName L2

SYMATTR Type ind SYMATTR SpiceLine Ipk=20 Rser=1m Cpar=2pF SYMBOL nmos 528 112 R0 WINDOW 0 114 48 Left 2 WINDOW 3 75 84 Left 2 SYMATTR InstName Q1 SYMATTR Value Si9420DY SYMBOL res 560 272 R0 WINDOW 0 66 54 Left 2 WINDOW 3 48 88 Left 2 SYMATTR InstName R1 SYMATTR Value 100m SYMBOL res 128 -64 R0 WINDOW 0 -50 33 Left 2 WINDOW 3 -52 64 Left 2 SYMATTR InstName R2 SYMATTR Value 1K SYMBOL res 928 208 M180 WINDOW 0 -97 78 Left 2 WINDOW 3 -114 42 Left 2 SYMATTR InstName R3 SYMATTR Value 7Meg SYMBOL res 928 400 M180 WINDOW 0 -74 64 Left 2 WINDOW 3 -80 31 Left 2 SYMATTR InstName R4 SYMATTR Value 20K SYMBOL cap 1072 -32 R0 WINDOW 0 -61 25 Left 2 WINDOW 3 -64 58 Left 2 SYMATTR InstName C1 SYMATTR Value 66n SYMATTR SpiceLine Rser=10m SYMBOL res 80 400 R90 WINDOW 0 7 110 VBottom 2 WINDOW 3 29 111 VTop 2 SYMATTR InstName R5 SYMATTR Value 20K SYMBOL cap -80 368 R180 WINDOW 0 -55 64 Left 2 WINDOW 3 -62 31 Left 2 SYMATTR InstName C2 SYMATTR Value 10n SYMBOL voltage -96 -64 R0 WINDOW 123 -220 84 Left 2 WINDOW 0 50 34 Left 2 WINDOW 3 50 66 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 24 SYMBOL res 1168 -48 R0 WINDOW 0 63 38 Left 2 WINDOW 3 64 71 Left 2 SYMATTR InstName R250 SYMATTR Value 250K SYMATTR SpiceLine pwr=12 SYMBOL res -32 -96 R270 WINDOW 0 43 61 VTop 2 WINDOW 3 -9 58 VBottom 2 SYMATTR InstName Rmon SYMATTR Value 1m SYMBOL cap 64 -224 R90 WINDOW 0 -47 29 VBottom 2 WINDOW 3 -40 30 VTop 2 SYMATTR InstName C4 SYMATTR Value 50m SYMBOL diode 784 -96 R270 WINDOW 0 -31 30 VTop 2 WINDOW 3 -32 31 VBottom 2 SYMATTR InstName D2 SYMBOL diode 960 -160 R180 WINDOW 0 56 41 Left 2 WINDOW 3 64 9 Left 2 SYMATTR InstName D1 SYMBOL cap 784 -256 R270 WINDOW 0 111 33 VTop 2 WINDOW 3 104 34 VBottom 2 SYMATTR InstName C6 SYMATTR Value 22n SYMBOL cap 1200 -176 R180 WINDOW 0 -59 45 Left 2 WINDOW 3 -65 15 Left 2 SYMATTR InstName C7 SYMATTR Value 22n SYMBOL diode 1040 -256 R270 WINDOW 0 72 33 VTop 2 WINDOW 3 67 33 VBottom 2 SYMATTR InstName D3 SYMBOL res 1552 -256 R0 WINDOW 0 -119 60 Left 2 WINDOW 3 -116 97 Left 2 SYMATTR InstName R1200 SYMATTR Value 600K SYMBOL diode 1200 -336 R180 WINDOW 0 58 38 Left 2 WINDOW 3 63 6 Left 2 SYMATTR InstName D4 SYMBOL cap 1392 -336 R180 WINDOW 0 44 0 Left 2 WINDOW 3 36 -31 Left 2 SYMATTR InstName C5 SYMATTR Value 22n SYMBOL diode 1248 -416 R270 WINDOW 0 -34 31 VTop 2 WINDOW 3 -37 31 VBottom 2 SYMATTR InstName D5 SYMBOL cap 1024 -416 R270 WINDOW 0 77 32 VTop 2 WINDOW 3 71 33 VBottom 2 SYMATTR InstName C8 SYMATTR Value 22n SYMBOL diode 1392 -512 R180 WINDOW 0 -37 -6 Left 2 WINDOW 3 -27 -35 Left 2 SYMATTR InstName D6 SYMBOL cap 1440 -416 R270 WINDOW 0 -39 32 VTop 2 WINDOW 3 -49 30 VBottom 2 SYMATTR InstName C9 SYMATTR Value 22n SYMBOL diode 1440 -592 R270 WINDOW 0 -31 30 VTop 2 WINDOW 3 -32 31 VBottom 2 SYMATTR InstName D7 SYMBOL cap 1248 -592 R270 WINDOW 0 -38 33 VTop 2 WINDOW 3 -43 34 VBottom 2 SYMATTR InstName C10 SYMATTR Value 22n SYMBOL res 448 240 R90 WINDOW 0 68 52 VBottom 2 WINDOW 3 75 53 VTop 2 SYMATTR InstName R7 SYMATTR Value 5K SYMBOL res 448 176 R90 WINDOW 0 -44 52 VBottom 2 WINDOW 3 -37 53 VTop 2 SYMATTR InstName R8 SYMATTR Value 33 SYMBOL res 432 48 R90 WINDOW 0 -40 54 VBottom 2 WINDOW 3 -33 55 VTop 2 SYMATTR InstName R6 SYMATTR Value 1K SYMBOL cap 272 -64 R0 WINDOW 0 -44 24 Left 2 WINDOW 3 -47 58 Left 2 SYMATTR InstName C3 SYMATTR Value 47p SYMBOL cap 48 48 R90 WINDOW 0 7 -4 VBottom 2 WINDOW 3 24 -2 VTop 2 SYMATTR InstName C11

TEXT 536 -160 Bottom 2 !K1 L1 L2 1 TEXT 216 -408 Left 2 !.tran 12ms startup TEXT 472 -224 Left 2 ;DRQ127 1:1 TEXT 736 272 Left 2 ;0.8V TEXT 992 -224 Left 2 ;MMBD5004 TEXT 112 -472 Left 2 ;HV SUPPLY J LARKIN June 30, 2015 TEXT 792 -312 Left 2 ;500V

--

John Larkin         Highland Technology, Inc 
picosecond timing   laser drivers and controllers 

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com
Reply to
John Larkin

How do you calculate your snubber values?

Reply to
bitrex

By fiddling.

--

John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers

jlarkin att highlandtechnology dott com

formatting link

Reply to
John Larkin

That's cheating!!

Reply to
bitrex

Why not? Since I have no objective definition of what I might want a snubber to do, I may as well frob values until it looks sorta nice.

Without the snubber, it just rings a bunch, which could be an EMI issue, so I may as well put the parts on the board. It does cost a little efficiency, which doesn't matter in this case.

I assumed K=1 (no leakage inductance) but those dual inductors are very close to 1. Adding leakage inductance really slows down the sim.

--

John Larkin         Highland Technology, Inc 
picosecond timing   laser drivers and controllers 

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com
Reply to
John Larkin

Life has slipped by me and my slide rule, can someone tell me the one word to feed into Google that will help me interpret the data below?

I presume it is some sort of circuit descriptor program

TIA

Owen

Reply to
Owen Cook

It's LT Spice, free and very cool.

Copy the text into an editor (Notepad will do) and save it as BOOST.asc. You may need to fix the long line wrap near the end.

Install LT Spice then double-click on the .asc file.

Click the running-man icon, then probe around.

--

John Larkin         Highland Technology, Inc 
picosecond timing   laser drivers and controllers 

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com
Reply to
John Larkin

I presume it is some sort of circuit descriptor program

TIA

Owen ==============================

"LTspice"

Reply to
Tom Miller

How do you calculate your snubber values?

Where do you see a snubber?? Single winding inductor, who needs a snubber??

Harry

Reply to
Harry D

This is similar, but I used more multiplier stages and a 2-winding inductor to get to 1200 volts out. Well, the customer now wants 1400.

Your circuit has a lot of ripple from subharmonic oscillation. I added the slope compensation (R7 below) to mine and it really cleaned things up.

John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers

jlarkin att highlandtechnology dott com

formatting link

JL, yours is too complex. Mine does 1400 Vout with one diode multiplier. There are plenty of HV MOSFETs (see STB18mn80) to 950 Vds. Use one MOSFET stage for 700VDC and a single diode multiplier for 1400V. There were no HV MOSFETs in the LT cupboard. Single inductor with no snubbers is the way to go. The ripple and sub harmonic oscillation is easy to fix. My schematic is just displaying concept and topology. Final unit would be clean, minimum components and high efficiency.

Regards, Harry D.

Reply to
Harry D

LT Spice generally defaults to all mosfets (and all diodes except zeners) being high voltage!

I need my HV1 output as well, 300 volts or so.

It is hard to get high flyback boost ratios; the capacitances start to eat up energy. And you'll need an inductor insulated for 700 volts. Your efficiency at your load is about 72% and gets worse at lighter loads. The high switch frequency and the monster mosfet and diodes could all be scaled down. Use ideal diodes like I did! The fixed 1 MHz of the LTC3621 is a constraint. The LTC3803 lets me tune the frequency, about 200 KHz in my case. The multi-stage multiplier takes a few more parts, but they are small parts (sot23 dual diodes, 0603 caps) and voltage stresses are low.

--

John Larkin         Highland Technology, Inc 
lunatic fringe electronics 

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com
Reply to
John Larkin

Thank you, the coolest thing since sliced bread and worked under wine as well!

Owen

Reply to
Owen Cook

Find LL or Lp, and what C it's resonating with (Cjo, Coss, parasitics?). Pick Rsn = sqrt(L/C) and Csn = 2.5 * C.

If you're using the "poke and try" method, use an initially oversized capacitor (10 or 100 times what the frequency would suggest), and find the resistor value that provides the best damping. It will get unusually hot, because it's dissipating lots of signal power too. Once that's good, reduce C until the ringing starts to get worse; finally, solder in place with a resistor of suitable power rating.

A good illustration is the discontinuous (DCM) flyback converter, which experiences two oscillations: when the switch turns off (and in CCM, also when the switch turns on and the diode is pulled off), which is LL + Coss, and when the current returns to zero (which is the ringing seen in this circuit), which is Lp + Coss + Cjo. Because these have different frequencies and impedances, they can be damped independently with two RCs.

Note that the capacitances must be reflected as primary side equivalents, for damping on the primary side, or vice versa.

An RC damper is purely dissipative, and not usually the best. The LL spike can be handled nicely with an RCD (dV/dt preferred) type snubber, which can also serve to increase risetime (reducing turnoff losses) and dampen Lp at the same time. This is also dissipative, but does lead to more options as far as recycling that energy, if you like (quasi-resonant or lossless snubbers).

The dual damper method is seen here (notice the difference in impedances and time constants for the two dampers, which makes them selective for their respective purpose):

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The snubber is seen here:

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which appears on a larger converter block; the impedances are low enough that Coss was resonating with the stray inductance of the 10n + BYV27 at about 30MHz, so that was damped with 2.2 ohms. (Peak switch current something like 30A.)

I don't have a good picture of that converter block, but it's visible bottom left here:

formatting link

Tim

--
Seven Transistor Labs, LLC 
Electrical Engineering Consultation and Contract Design 
Website: http://seventransistorlabs.com 

"bitrex"  wrote in message  
news:55ac159f$0$12089$4c5ecfc7@frugalusenet.com... 

How do you calculate your snubber values?
Reply to
Tim Williams

[flyback HV generator with several stages of voltage-multiply rectifier]

The use of the 'feedback' pin with high-ratio resistor divider is somewhat of an issue (both because HV is unkind to resistors, and because of load and stray capacitance). I see you took feedback from a low tap on the rectifier; good call.

One can get CCFL transformers with 1:100 ratios, and there's another way to regulate HV: use a full-wave Cockcroft-Walton rectifier (three series capacitor strings, LOTS of diodes), and feed it a regulated triangle wave.

So, make a stable triangle-wave generator, feed it into one of the cheapo class-D audio amplifier chips, and drive the primary of the stepup transformer with that. Current into a short circuit is nearly ripple-free because the full-wave rectifier pushes current into any load according to the applied dV/dt, on either the upslope or downslope. Peak voltage is as stable as the amplifier gain and the transformer ratio.

There's some issue with the lack of a HV center tap, but there's some ways around that. Main issue: the CCFL transformer usually has

12V power and runs 40 kHz and up; if y ou want to get three harmonics (1 3 5) of the triangle wave, you have to drop down around 3 kHz, and might only be able to drive 1V into the primary, with the audio amplifier bandwidth. I've bought some parts to play with, will get a prototype wired together RealSoonNow.
Reply to
whit3rd

I recall hearing that Mike Engelhardt decided long ago that the easiest way to deal with calls for Linux support was to make sure that LTspice worked well in wine, which it does.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs 
Principal Consultant 
ElectroOptical Innovations LLC 
Optics, Electro-optics, Photonics, Analog Electronics 

160 North State Road #203 
Briarcliff Manor NY 10510 

hobbs at electrooptical dot net 
http://electrooptical.net
Reply to
Phil Hobbs

Is anyone else seeing a really slow connection when running the update process?

Or am I doing something wrong?

Reply to
Tom Miller

It seems to take a few minutes to check all those files.

--

John Larkin         Highland Technology, Inc 
picosecond timing   precision measurement  

jlarkin att highlandtechnology dott com 
http://www.highlandtechnology.com
Reply to
John Larkin

well!

O_h, you might find a couople of people here to get along with. Some use Li nux. I hve but I don't becauase honestly I have not learned how to really m aster it. I mean, I figured out modifications to Windows and registry edits and all that, and actually I still would rather have 98SE back. there wer a few things I could do with that that XP put a stop to. andI tried. And th en doing what I figured out in XP was a total bitch to do on Vista and I st il haven't even figured out how to do that on Win 7. Every "upgrae" takes m ore away from me.

Soon, I will force myself to learn Linux. I got a 10.2 live disk and both m y junkers run on it just fine.

Anyway, I am almost surprised that Spice won't run in Linux itself, that yo u even have to use wine.

And what do MAC users do ? Do they also need an emulator ?

Reply to
jurb6006

Oh, you can afford to burn up silicon. Must be nice.

But then silicon is the sec... wait the - hatever almost most abundant mineral on the planet.

Dopants on the other hand are another story.

Reply to
jurb6006

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