Bomb-proof func. gen. power amp

=A0 =A0|/

| =A0 =A0 =A0 =A0 =A0|>

| =A0 100 =A0 =A0 =A0|

=A0 =A0 |

=A0| =A0 =A0 =A0 =A0 =A0 | | =A0|/ |

=A0 =A0 =A0 +----------| =A0 2N4403

=A0 =A0| | =A0 =A0 =A0 =A0 =A0 =A0CCC

GND =A0 =A0 =A0 =A0 =A0| *

=A0 =A0 =A0 =A02k R

ower

rather weak excuse

along with R on the output, fuse and psu crowbar they sure do. That lot will keep excess V off the active devices in circuit while the fuse pops.

NT

For what? You're the one who didn't understand the circuit.

But that wasn't what you said at the beginning--because you moved the goal posts, as I said. Plus you never mentioned any of these other things before now. How about turning a pumpkin into a coach-and-four, and a rat into a footman? Or base metal into gold?

Cheers

Phil hobbs

You sound like my father, he happens to be a guitarist.. And to this day, its tubes only that he likes.

He's 72 and still plays, he has a 800 watt tube amp, yes I know, its much for what he uses it for. It sucks power and I think its a Fender.

=A0 =A0|/

=A0 | =A0 =A0 =A0 =A0 =A0|>

=A0 | =A0 100 =A0 =A0 =A0|

=A0 =A0 |

=A0| =A0 =A0 =A0 =A0 =A0 | | =A0|/ |

=A0 | =A0 =A0 =A0 +----------| =A0 2N4403

=A0 =A0| | =A0 =A0 =A0 =A0 =A0 =A0CCC

=A0GND =A0 =A0 =A0 =A0 =A0| *

=A0 =A0 =A0 =A0 =A02k R

llower

ng a

t to

I dont agree with your interpretation at all. Diodes will make it more bomb proof, add the other things and it can be even more so, as explained. Of that I dont think theres a lot of doubt

NT

And of course, the correct types of diode are important in some cases.

Jamie

...and the incorrect types of diodes are important in other cases? I suppose, if you're shooting for the *phut* factor.

On Sun, 26 Dec 2010 02:21:28 GMT, snipped-for-privacy@quantumx.com (David King) wrote:

--- Can you use this?:

Version 4 SHEET 1 1476 980 WIRE -1616 -480 -1664 -480 WIRE -1520 -480 -1552 -480 WIRE -1984 -384 -2016 -384 WIRE -1936 -384 -1984 -384 WIRE -1808 -384 -1856 -384 WIRE -1664 -384 -1664 -480 WIRE -1664 -384 -1808 -384 WIRE -1632 -384 -1664 -384 WIRE -1520 -384 -1520 -480 WIRE -1520 -384 -1552 -384 WIRE -1088 -384 -1520 -384 WIRE -1728 -304 -2112 -304 WIRE -1408 -304 -1728 -304 WIRE -1232 -304 -1408 -304 WIRE -1408 -256 -1408 -304 WIRE -2112 -224 -2112 -304 WIRE -1232 -208 -1232 -304 WIRE -1408 -128 -1408 -176 WIRE -1280 -128 -1408 -128 WIRE -1408 -96 -1408 -128 WIRE -1408 0 -1408 -32 WIRE -1408 96 -1408 64 WIRE -1728 176 -1728 -304 WIRE -1808 192 -1808 -384 WIRE -1760 192 -1808 192 WIRE -1408 208 -1408 160 WIRE -1408 208 -1696 208 WIRE -2112 224 -2112 -144 WIRE -2112 224 -2208 224 WIRE -1760 224 -1808 224 WIRE -1232 224 -1232 -112 WIRE -1088 224 -1088 -384 WIRE -1088 224 -1232 224 WIRE -1408 256 -1408 208 WIRE -1088 336 -1088 224 WIRE -1408 352 -1408 320 WIRE -1600 432 -1648 432 WIRE -1504 432 -1536 432 WIRE -1408 448 -1408 416 WIRE -1808 528 -1808 224 WIRE -1648 528 -1648 432 WIRE -1648 528 -1808 528 WIRE -1616 528 -1648 528 WIRE -1504 528 -1504 432 WIRE -1504 528 -1536 528 WIRE -1088 528 -1088 416 WIRE -1088 528 -1504 528 WIRE -1232 560 -1232 224 WIRE -1088 560 -1088 528 WIRE -1040 560 -1088 560 WIRE -2112 576 -2112 224 WIRE -1984 576 -1984 -384 WIRE -1408 576 -1408 512 WIRE -1280 576 -1408 576 WIRE -1808 608 -1808 528 WIRE -1408 624 -1408 576 WIRE -1088 624 -1088 560 WIRE -2112 752 -2112 656 WIRE -1728 752 -1728 240 WIRE -1728 752 -2112 752 WIRE -1408 752 -1408 704 WIRE -1408 752 -1728 752 WIRE -1232 752 -1232 656 WIRE -1232 752 -1408 752 WIRE -2208 800 -2208 224 WIRE -1984 800 -1984 656 WIRE -1984 800 -2208 800 WIRE -1808 800 -1808 688 WIRE -1808 800 -1984 800 WIRE -1088 800 -1088 704 WIRE -1088 800 -1808 800 WIRE -2208 880 -2208 800 FLAG -2208 880 0 FLAG -2016 -384 Vin FLAG -1040 560 Iout SYMBOL voltage -2112 -240 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 20 SYMBOL voltage -2112 560 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value 20 SYMBOL voltage -1984 560 R0 WINDOW 3 24 104 Invisible 0 WINDOW 39 0 0 Left 0 SYMATTR Value SINE(0 1 5000) SYMATTR Value2 AC 1 SYMATTR InstName V3 SYMBOL res -1824 592 R0 SYMATTR InstName R2 SYMATTR Value 100k SYMBOL nmos -1280 -208 R0 SYMATTR InstName M1 SYMATTR Value FDS6699S SYMBOL pmos -1280 656 M180 SYMATTR InstName M2 SYMATTR Value HAT1072H SYMBOL res -1424 -272 R0 SYMATTR InstName R5 SYMATTR Value 3k SYMBOL res -1424 608 R0 SYMATTR InstName R6 SYMATTR Value 3k SYMBOL diode -1424 96 R0 WINDOW 3 36 32 Left 0 SYMATTR Value 1N4148 SYMATTR InstName D3 SYMBOL diode -1424 -96 R0 WINDOW 3 41 30 Left 0 SYMATTR Value 1N4148 SYMATTR InstName D1 SYMBOL diode -1424 0 R0 WINDOW 3 37 34 Left 0 SYMATTR Value 1N4148 SYMATTR InstName D2 SYMBOL diode -1424 256 R0 WINDOW 3 41 32 Left 0 SYMATTR Value 1N4148 SYMATTR InstName D4 SYMBOL diode -1424 352 R0 WINDOW 3 41 31 Left 0 SYMATTR Value 1N4148 SYMATTR InstName D5 SYMBOL diode -1424 448 R0 WINDOW 3 43 32 Left 0 SYMATTR Value 1N4148 SYMATTR InstName D6 SYMBOL res -1536 -400 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R3 SYMATTR Value 200k SYMBOL res -1520 512 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R4 SYMATTR Value 200k SYMBOL Opamps\\LT1127 -1728 144 R0 SYMATTR InstName U1 SYMBOL cap -1552 -496 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C1 SYMATTR Value 1e-11 SYMBOL cap -1536 416 R90 WINDOW 0 0 32 VBottom 0 WINDOW 3 32 32 VTop 0 SYMATTR InstName C2 SYMATTR Value 1e-11 SYMBOL res -1104 320 R0 SYMATTR InstName R7 SYMATTR Value 1 SYMBOL res -1840 -400 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R1 SYMATTR Value 100k SYMBOL res -1104 608 R0 SYMATTR InstName R8 SYMATTR Value 6 TEXT -2200 856 Left 0 !;ac oct 512 .1 1e6 TEXT -2200 824 Left 0 !.tran .001 startup uic TEXT -1016 664 Left 0 ;LOAD

--- Dual supplies, but...

True bipolar output, and the frequency response is flat from DC to

--- JF

--- This is a pretty simple circuit and and will get you everything you want except the 12V swing, because the pass transistor and current sense resistor eat up some of the 12V.

Version 4 SHEET 1 880 680 WIRE 512 -64 512 -96 WIRE 512 112 512 16 WIRE 208 128 208 96 WIRE 176 144 -128 144 WIRE 320 160 240 160 WIRE 448 160 400 160 WIRE 176 176 112 176 WIRE 208 208 208 192 WIRE 112 352 112 176 WIRE 512 352 512 208 WIRE 512 352 112 352 WIRE -128 368 -128 144 WIRE 16 368 16 336 WIRE 512 384 512 352 WIRE -128 496 -128 448 WIRE 16 496 16 448 WIRE 16 496 -128 496 WIRE 512 496 512 464 WIRE 512 496 16 496 WIRE -128 512 -128 496 WIRE -128 512 -160 512 WIRE -128 560 -128 512 FLAG -128 560 0 FLAG -160 512 0V FLAG 208 96 0V FLAG 16 336 +12 FLAG 208 208 +12 FLAG 512 -96 +12 SYMBOL res 496 368 R0 WINDOW 3 36 68 Left 0 SYMATTR InstName R2 SYMATTR Value .5 SYMBOL voltage 16 352 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 12 SYMBOL voltage -128 352 R0 WINDOW 3 24 104 Invisible 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value SINE(.4 .4 1000) SYMBOL npn 448 112 R0 SYMATTR InstName Q1 SYMATTR Value FZT849 SYMBOL res 496 -80 R0 SYMATTR InstName R1 SYMATTR Value 4.5 SYMBOL res 416 144 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R3 SYMATTR Value 100 SYMBOL Opamps\\LT1218 208 224 M180 SYMATTR InstName U2 TEXT -208 584 Left 0 !.tran .1 uic

--- JF

Many thanks for posting the two net lists. I assume they are from LTSpice. But when I open and run I get "multiple instances" errors.

Please advise. I would _really_ like to see these.

David King

I guess if you don't know anything about switching inductive devices at high rates, it's not my problem..

jamie

Of course you prove, once again, how stupid you are. I was *not* talking about "switching inductive devices" or even about electronics, dummy. Your language skills are zero (right next to your design skills).

follower

Another country heard from generating white noise beyond belief..

Go milk a cow, farm boy..

Jamie..

They open up and run fine for me. Check to see if this has to do with line endings. I highlighted the text in my news reader, hit ctrl-C to copy the text to the clipboard, opened up notepad, hit ctrl-V to paste, then did a Save-As, making sure to specify the .ASC extension. That's about it. Opened right up in LTspice.

Jon

Word wrap may confound. Check for lines wrapped that shouldn't be. ...Jim Thompson

follower

suppose,

You're projecting again, moron.

You really are clueless. I suppose that's not so unusual, being illiterate.

The opa547 is my favorite power opamp. It does DC real nice.

George H.

Sorry, I forgot the .asc extension.

David

follower

to

suppose,

You aren't to bright yourself hick boy..

Obviously you don't know the first thing about intellectuality, and how to identify it. The limited verbose and colorful metaphors drooling out that pie hole of yours, is evident.

Yeah, you're a real party animal...

Jamie..

follower

driving a

energised

to

suppose,

You're too funny, idiot. JFYI, I've never lived on a farm. No one in my family has ever been a farmer, not that there is anything wrong with being a farmer. It's at least honest work, something you've never done in your life.

Wow, six syllables. What hypocrisy. ...not that I said anything about intellectuals (which you most certainly are not). However, I *do* know when someone is an illiterate, as you have proven yourself to be. I also know something about electronics, which you've also proven you don't.

A great example of both, in one sentence:

"the correct types of diode are important in some cases" Jamie the Moron

I have you on the ropes, moron. Now run along and play with DimBulb, twit.