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Old 24th November 2007, 08:44 PM   #1511
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Interesting synchronicity, Dave.

I've been using the 6/4/07 dated schematic, so it appears I'm on the correct path--good to see my question directly supports your efforts.
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Old 24th November 2007, 08:48 PM   #1512
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I'm finishing the interior of my hobby room before I begin the F4 and the Pumpking/Shunty project. My "great-room" is currently a "great-closet".

Ohhhh how I wish I were as far along as some of you folks.
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Old 24th November 2007, 09:22 PM   #1513
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Has this been asked before? I don't remember reading it.

How closely matched are your output MOSFETS?. What are the voltage readings across each output source resistor? If there is a large enough imbalance you might have a difficult time reaching 0 volts offset.
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Old 24th November 2007, 09:30 PM   #1514
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Quote:
Originally posted by carpenter
I'm finishing the interior of my hobby room before I begin the F4 and the Pumpking/Shunty project. My "great-room" is currently a "great-closet".

Ohhhh how I wish I were as far along as some of you folks.

you have your own hobby room too ! Cool, me too! However im slowly getting out of audio and geting into my new hobbie, R/C Helis Just ordered 2 of them about 1200$ for 2

JaseClick the image to open in full size.
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Old 24th November 2007, 09:42 PM   #1515
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Quote:
Originally posted by BDP
Has this been asked before? I don't remember reading it.

How closely matched are your output MOSFETS?. What are the voltage readings across each output source resistor? If there is a large enough imbalance you might have a difficult time reaching 0 volts offset.

It's my understanding that the opposing banks don't need to be matched to one another. How do you feel about this?

I plan to match to within .01 volts, but haven't given cross matching (9xxx to xxx) much thought.
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Old 24th November 2007, 09:45 PM   #1516
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Quote:
Originally posted by jleaman



you have your own hobby room too ! Cool, me too! However im slowly getting out of audio and geting into my new hobbie, R/C Helis Just ordered 2 of them about 1200$ for 2


What's a serious audio fanatic going to do without his own space. I'm going to paint a skull and crossbones on the entry door with a "boys only" sign.
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Old 24th November 2007, 09:48 PM   #1517
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Quote:
Originally posted by carpenter



What's a serious audio fanatic going to do without his own space. I'm going to paint a skull and crossbones on the entry door with a "boys only" sign.

Nice, I don't need to do that, i just asked the Wife, i need my own room so yeah.
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Old 24th November 2007, 10:07 PM   #1518
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Quote:
Originally posted by jleaman



Nice, I don't need to do that, i just asked the Wife, i need my own room so yeah.

The sign is a lark, might generate a few smiles.
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Old 24th November 2007, 10:08 PM   #1519
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Quote:
Originally posted by jleaman
R/C Helis, about 1200$ for 2
Peanuts, this Dirk guy developes his own software for R/C planes.
Everything else is also developed inhouse ( easy to do if you own an company that has computer operated machinery to manufacture one-off orthopedic shoe soles.)
The cheapest of his airplanes cost $75K.
(The no1 inventor on the patent is me MD mrs)
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Old 24th November 2007, 10:26 PM   #1520
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is me MD mrs
I think I'm finally beginning to understand Jaccovititetity - Is this a good thing?
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