More like this SOZ on Passdiy - but different!
http://www.passdiy.com/images/zen gallery/soz-p7-1.jpg
I think of the SOZ/SOX as the SET of sand amps, So I want a kind of old lab equipment look.
http://www.passdiy.com/images/zen gallery/soz-p7-1.jpg
I think of the SOZ/SOX as the SET of sand amps, So I want a kind of old lab equipment look.
Sense Resistors in XA
Hi there!
I´m just working with the boards of Karis Group buy!
How critical are the Sense resistors at the Output (the parallel 0,47Ohm- resistors)?
In the WIKI it is mentioned, that they all have to be the same value, including the Source-Resistors (have alook at Grey´s scematic -compare post43 in Karis thread-where I have also asked this).
Do I need only two sense-resistors on each side8total of 4), if I want to use only 4 output-mosfets (complete Aleph-XA including CCS)?
Best wishes from Germany!
Hi there!
I´m just working with the boards of Karis Group buy!
How critical are the Sense resistors at the Output (the parallel 0,47Ohm- resistors)?
In the WIKI it is mentioned, that they all have to be the same value, including the Source-Resistors (have alook at Grey´s scematic -compare post43 in Karis thread-where I have also asked this).
Do I need only two sense-resistors on each side8total of 4), if I want to use only 4 output-mosfets (complete Aleph-XA including CCS)?
Best wishes from Germany!
I'm trying to figure out what inductors to order for my SOX amp.
The problem is calculating the total DCR so that I can determine the voltage drop and heat output.
If the DCR of each inductor is .151 and the amps are 18, then the voltage drop is about 2.7, right? and the watts given off are around 48 right?
The thing that has me confused (if in fact the above is right
)
is that there is an inductor on each rail. So will the voltage drop be 2.7
or 2 times that ( 5.4) because there are 2 rails, V plus and V minus?
I think its 2.7 V each rail, so I guess I just subtract 2.7v from each rail voltage? but I can't afford a mistake!!
I think the watts given off will be the 2 together ie 96
in other words, if the power supply after the diode bridge, and the first of the CLC caps is 25 volts, then after the inductor each rail will be 22.3 volts?
Mark
The problem is calculating the total DCR so that I can determine the voltage drop and heat output.
If the DCR of each inductor is .151 and the amps are 18, then the voltage drop is about 2.7, right? and the watts given off are around 48 right?
The thing that has me confused (if in fact the above is right
)is that there is an inductor on each rail. So will the voltage drop be 2.7
or 2 times that ( 5.4) because there are 2 rails, V plus and V minus?
I think its 2.7 V each rail, so I guess I just subtract 2.7v from each rail voltage? but I can't afford a mistake!!
I think the watts given off will be the 2 together ie 96
in other words, if the power supply after the diode bridge, and the first of the CLC caps is 25 volts, then after the inductor each rail will be 22.3 volts?
Mark
I've got several rooms that resemble that "Pass Labs starting out" photo and I'm not even making any money at this. I've got a selection of those 60 drawer plastic parts bins, but am slowly shifting over to some larger metal framed Mallory drawer sets that I picked up when my favorite local parts place folded last summer.
The cooling picture looks strangely familiar...still only the two pairs of Aleph 2s are water cooled here, but I keep threatening to do something rather more aggressive. I have ideas that I'd like to try out on a larger scale, but they'll have to wait until I have more time.
Kent looks bored in the 'control room.' You need to find some way to keep him better occupied.
Grey
The cooling picture looks strangely familiar...still only the two pairs of Aleph 2s are water cooled here, but I keep threatening to do something rather more aggressive. I have ideas that I'd like to try out on a larger scale, but they'll have to wait until I have more time.
Kent looks bored in the 'control room.' You need to find some way to keep him better occupied.
Grey
I've always wanted to work for a company like that.
Actually, I did. Briefly worked with Electronics One, which
was a hole-in-the-wall that built products under contract.
One of them was a commercial version of Marshall Leach's
amplifier; two versions, in fact. Homework was trying to fix
a ground loop, and listening tests of the amplifiers.
Alas, the company was weak, I was laid off and under the
cover of darkness one night it went away. I have interesting
souvenirs from the old days before drafting programs.
It was fun while it lasted, except for the splitting headache
I got one afternoon after inhaling solvent fumes. I
did schematic and mechanical drafting (with zero prior
experience), and ran a wave soldering machine, tested
various parts and modules and assembled products, and
attempted to repair them, swept and waxed floors, grabbed
lunches at the famous Varsity, watched trains from the
loading dock (plus!). Small companies are fun for the
variety of work you get/have to do.
For almost thirteen years I worked for Solid State Systems,
(private branch telephone exchanges and energy management
system), which was somewhat larger and more stable.
Recession finally got 'em, I was laid off and the company sold
to a competitor. Pay wasn't much but the people were good
folks and I generally enjoyed the job and learned things and
did many, many different things. The best part was looking
over the engineer's shoulder during the design process, testing
and writing up engineering change orders on the prototypes,
and staying on top of a dozen different power supply designs in
and out of production.
I worked for a much much larger medical electronics company
in the Redmond, WA area a few years ago. I stood at one
work station all day, pushing buttons on test sets; the
product practically never failed a test, I wasn't allowed to fix
anything that didn't work right, my supervisor hated his job
and took it out on us/me, and I hated the job and my life. The company cafeteria was the sole good thing about it. I quit after eight months and haven't worked since. I guess I'm retired. I'm
bored, nearly broke and at least have an inheritance to live
on. But I'm bored.
I miss that little hole in the wall. It was weird and unpredictable,
but it was fun. Little companies and startups can be like that.
--Damon
Actually, I did. Briefly worked with Electronics One, which
was a hole-in-the-wall that built products under contract.
One of them was a commercial version of Marshall Leach's
amplifier; two versions, in fact. Homework was trying to fix
a ground loop, and listening tests of the amplifiers.
Alas, the company was weak, I was laid off and under the
cover of darkness one night it went away. I have interesting
souvenirs from the old days before drafting programs.
It was fun while it lasted, except for the splitting headache
I got one afternoon after inhaling solvent fumes. I
did schematic and mechanical drafting (with zero prior
experience), and ran a wave soldering machine, tested
various parts and modules and assembled products, and
attempted to repair them, swept and waxed floors, grabbed
lunches at the famous Varsity, watched trains from the
loading dock (plus!). Small companies are fun for the
variety of work you get/have to do.
For almost thirteen years I worked for Solid State Systems,
(private branch telephone exchanges and energy management
system), which was somewhat larger and more stable.
Recession finally got 'em, I was laid off and the company sold
to a competitor. Pay wasn't much but the people were good
folks and I generally enjoyed the job and learned things and
did many, many different things. The best part was looking
over the engineer's shoulder during the design process, testing
and writing up engineering change orders on the prototypes,
and staying on top of a dozen different power supply designs in
and out of production.
I worked for a much much larger medical electronics company
in the Redmond, WA area a few years ago. I stood at one
work station all day, pushing buttons on test sets; the
product practically never failed a test, I wasn't allowed to fix
anything that didn't work right, my supervisor hated his job
and took it out on us/me, and I hated the job and my life. The company cafeteria was the sole good thing about it. I quit after eight months and haven't worked since. I guess I'm retired. I'm
bored, nearly broke and at least have an inheritance to live
on. But I'm bored.
I miss that little hole in the wall. It was weird and unpredictable,
but it was fun. Little companies and startups can be like that.
--Damon
