I don't think it will take you long to ace Diptrace. The hardest part to learn is editing your own compenents, but that's fairly simple.
I takes me less a week to switch from eagle to diptrace including library managing. Don't forgot you can import eagle library and pattern who is plenty over internet.
Marc
When you place the RF filter after the diamond, then you can placa a vol control in front of you circuit (vol controls vary in series impedance and thus alter the input filtering of you amp) with the diamond you have the option of having a constant input filtering p, thus you have a lager room to optimize your compensation
Well you'll still get the other software I promised. You'll just have an extra copy of diptrace you can put away if you ever need it. I'll just send it regular mail than rather than overnight. You'll have lots of questions. I think perhaps JW is using the same software for some of his design work at his real job, it isn't something most would have that is for sure. I have other software that costs as much as a house, not something I can share, and not something you would ever need if you aren't building an airplane or a car.
Pete's Power Amps has a nice ring to it. Why not make it commercial if you can make money and take care of your family? It is just so much work to do production, ones and twos is one thing, serial production is another. RNM is still associated with a company that builds finished goods but do you think they would do your designs justice if made in Asia? Probably cut to many corners and it would just become another me to product.
OS, just to help, try to simulate distortion of your CFA amps using two path for feedback with 1% difference values of the 2 serial resistances. It increase a lot. On my opinion it is better to avoid this.
Oh , I plan on it.
The "tweaked" ND just "blows me away" (better than moonshine 😀).
-One sprint version for the big slew IPS - board house ready and anal.
- AND , that small integrated diptrace solution.
At <60v rails
...2sb1275/2sd1918 - CPT-3 package can be used for both
the EF3 drivers and VAS (1.5A /10W).
... all the BCxxx are smd , no problem finding smd predrivers , either.
... output can be higher beta MT-200 sankens
I'll need to put the EF3 , multipliers , IPS one small PCB.
Still , a 125W/8R amp on a 76 X 100mm PCB is good !!
OS
At 1% (R16=1.23K) , no problem ... not 1 ppm change.
At 5% (R16=1.26 and above) , it jumps to 44ppm !!
Your observation is quite correct , but need to be real bad for errata
(much higher THD).
High quality feedback resistors would make this a non-issue .
Thanks !
OS
Kindhornman, There is nothing quite like getting ripped off on your ideas and
not getting anything. Anyone who's lived and created something can attest to
it. Even with fairley good documentation, working with producers,
that you thought you trusted and trying to make good for a colleague, working with
shops trying to produce a show....only to find out the guy you trusted gave his
agency the show, and they financed it through shell companies. Then to see the
guy's on the Tonight show saying they approached us and asked if we wanted to
do it. Ah, the un-joy of the dirty SOB producing that slow and quiet car show
and its derivatives here in north Texas.
Steve, yes those that you mention are the "quality of the day" programs.
The underlying work was from Deming, Juran, Ishikawa, et al. from Western
Electric, Columbia and others. I was fortunate to attend and meet Deming
during attendance at one of his seminars, a brilliant mind and a gentleman.
I learn how crappy my professors really were at teaching and using statistics.
Until I went through got certified in a number of Quality initiatives while working
at General Motors.
Maybe OS can chime in here as he was at GE for a bit. Pete what kind of guy was
Jack Welsh? Was he a good collaborator and spread the weath amoung his people
and employees?
Any way, I'm just trying to open up thought to some possibilities.
Manage expectations....don't expect or want home runs....
better to work towards manageable disbursed income streams. : )
Everybody can win on this. Then follow what happens...often times
things will lead you to where they need to go...it might be slightly
different than what we expect.
not getting anything. Anyone who's lived and created something can attest to
it. Even with fairley good documentation, working with producers,
that you thought you trusted and trying to make good for a colleague, working with
shops trying to produce a show....only to find out the guy you trusted gave his
agency the show, and they financed it through shell companies. Then to see the
guy's on the Tonight show saying they approached us and asked if we wanted to
do it. Ah, the un-joy of the dirty SOB producing that slow and quiet car show
and its derivatives here in north Texas.
Steve, yes those that you mention are the "quality of the day" programs.
The underlying work was from Deming, Juran, Ishikawa, et al. from Western
Electric, Columbia and others. I was fortunate to attend and meet Deming
during attendance at one of his seminars, a brilliant mind and a gentleman.
I learn how crappy my professors really were at teaching and using statistics.
Until I went through got certified in a number of Quality initiatives while working
at General Motors.
Maybe OS can chime in here as he was at GE for a bit. Pete what kind of guy was
Jack Welsh? Was he a good collaborator and spread the weath amoung his people
and employees?
Any way, I'm just trying to open up thought to some possibilities.
Manage expectations....don't expect or want home runs....
better to work towards manageable disbursed income streams. : )
Everybody can win on this. Then follow what happens...often times
things will lead you to where they need to go...it might be slightly
different than what we expect.
That's not the main issue. It's harder to find High voltage SMD 1A+
transistors like the ksc3503/ksa1381.
Even that 2SB/SD smd combo could reduce IPS/OPS performance
by a few percent . Cob is 30pf for them vs. <10 for the 3503/1381.
Hopefully, the better SMD resistors , shorter traces would cancel
this out.
Output coil could also be offboard (or a ayrton-perry coil !! )
OS
I was lowly contractor at GE.
He did come once , surrounded by every brown -nosing , a$$-sucking ,
no - nothing on the plant site. I was told to "stay hidden".
Those who actually kept the place running were quite insignificant.
Those who were adept at the above "skills" were rewarded.
OS
MJD340/350 are good for 300V. I never did find anything as good as KSC3503/KSA1381. Maybe this is part of the reason Valery went to Fets.
Synch,
I'm going to guess Gas Monkey Garage. I know all about having your ideas ripped off, been there had that done.
Pete,
If you are 98% as good as the thru hole designs can you imagine how much better this is going to be over using monolithic chip amps. Real current being able to drive the speakers is going to make such a difference. The tweeter amp is going to require so little I'm not sure you would even stay with an EF3 or would you do something different for only 30 watts@8 ohms/
Your package has been mailed, you should have it in a couple of days.
I'm going to guess Gas Monkey Garage. I know all about having your ideas ripped off, been there had that done.
Pete,
If you are 98% as good as the thru hole designs can you imagine how much better this is going to be over using monolithic chip amps. Real current being able to drive the speakers is going to make such a difference. The tweeter amp is going to require so little I'm not sure you would even stay with an EF3 or would you do something different for only 30 watts@8 ohms/
Your package has been mailed, you should have it in a couple of days.
340/350 ... YUK ! 15mhz ft high (unknown Cob).
NPX and a few others have a lot of 50-80mhz ft 20'ish Cob devices @
over 160V. This creation will be a 45-60V 100w amp , not an "arc welder" 😀.
I'm staying BJT.
OS
OS - Imagine that, JW and his buddies.
I also imagine you got stuff done. : )
Funny how that always seems to be the case. I have done many
consults/contracts, etc, etc. When I've taken "real" jobs, and I've
asked to work certain projects it's been, "that is why we hire contractors
so they can do those jobs".
I've always enjoyed the line work, line workers, engineers and
people who got stuff done. I was guaranteed a life time of work and
benefits while working over on the Electric Aircraft, think 16,
at the big aircraft plant if one of the big VP's admins and I
tied the knot. This is not one of the knots outlined in Kindhornman's
NASA Specs.
Interesting though all those aircraft have live ejection seats on the
assembly line. Another interesting aspect, the electronics guy's
detested workers and inspectors running around with fluke meters
testing things. The working voltages on the meters for continuity
and diode check's were too high and they'd trip the relays making
them set to the incorrect setting. All these false settings would have
to be tracked down on each aircraft and re set manually.
On the good side was there were a bunch of great and dedicated
men and women who really loved what they did and took all the
jr. high and high school mentality supervisor crap because they
cared about the aircraft and the people who flew them.
Better still, as long as you kept flying the aircraft they would probably
last indefinitely. It's when they were just sitting around in a hangar
or else where for longer than a week that problems started happening.
FOD - is everyone's responsibility.
Foreign Object Debris/Foreign Object damage.
Kindhornman you are right on the money. I refuse to say those words.
Cheers,
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Through hole TO218 actually take less board space than the SMT version. Add heat sink pad size and D-Pac is a huge waste of space. I think you mentioned the extra capacitance with the heat sink being an issue as well.
This is another thing, looking at the commercial endeavors around here ,
they use 3-4ma VAS's and 5ma drivers to run LFET's.
NO EF3's for the simple reason of accommodating all SMT - minus the actual power outputs.
To go EF3 , I'd have to do the HK680 - 2sa1837/mje340/2sc4793 "sandwich" (for the driver stage).
Plus another MJE for main Vbe , and the 2 MT-100/200's. 6 through-hole
semi's and at least 2 large electro's.
Easy enough to get that on 50mm , leaving me 50mm for the actual IPS.
I want to be different , a small stable 60/120W EF3 BJT. (MT-100/200).
They might be a bit more powerful with their "fancy pants" dual-die
LFET's ..... but they won't have that nice BJT "warmness" !!! 😀
That's the plan.
OS