We try to keep it real. Subjective does not have much importance when
we can watch semi's either shake warehouses or go poof.😀
Your needs could be met with TO-3P's and 50V rails. Two amps and 2
IPS's with mini slew based EF3's could be quite small and fine tuned
with the loop cancellation techniques of the silicon chip or cambridge
amp layouts.
Since most slew IPS's already have a servo , the supplies are already
there for an active EQ. One could even mix IPS's (spook/simetri bass -
kypton nd - HF).
PS - I will get back to the symetri after this OPS is done ... Evan is
"itching" for power.
OS
PCBWay is offering free prototyping boards under 10cm x 10cm for students and hobbyists right now. That sounds interesting. I thought the $13 thing was good!
Yes , scratching ..... 😀
- You need those keystone 7797's - 7797 Keystone Electronics | 7797K-ND | DigiKey
http://www.keyelco.com/userAssets/file/M60-2p65.pdf
They rate these at only 15A !! A faston is 30A ... WTF !
No matter , the PCB has dual regular faston option (60A ?) rail tracks @
32A.
- Fuses = GmA15 20mm 15A forever , 2min @ 30A.
http://www.mouser.com/ds/2/87/Bus_Elx_DS_2017_GMA_Series-335873.pdf
A 12A fuse on my 3 pair
MT-200 sub amp opened with no output damage. I'm not "guessing" ...
- And , 21'st century protection ... either both relays tied together or
both MOSFET's paralleled. My 3P sub amp uses the two relays paralleled.
I have one more newer MOSFET PCB , needs stuffing.
- Inductor is different. Runs up-down - perpendicular to tracks. Bigger
16ga 20 turn "monster" spun on a double AA battery. Field lines
also go (up-down). Don't mount anything within >25mm over the top of
this coil !
Avoid PC-Layout "Gotchas" in ISM-RF Products - Tutorial - Maxim
Note - self is vague on this , section 13.1.2 ... in his "guide" 🙄
- 2 X 1Kuf and 2 X 470 or 220uF decoupling caps + 2.2R - 3.3R 2W (driver R/C).
This amp can melt wires and voice coils.
Just a rundown on what is different on my " V3 " arcwelder OPS.
Special considerations for over 10A operation.
This one could catch those wood cases on fire !!! 😱
OS
Does anyone on this forum have a thermal camera.
It would be interesting to see a faston connected to the female connector passing 15A continuous on camera.
They are notorious for being hot, but now I'm talking in other applications not amps
It would be interesting to see a faston connected to the female connector passing 15A continuous on camera.
They are notorious for being hot, but now I'm talking in other applications not amps
I think it would change every time you unplugged and reconnected it. They carry current better when they are connected with the largest wire they can accept too. Yellow will work okay with 10 gauge but melt with 12 gauge.
JW,
I would think the contact points on a female connector would be fairly small in surface area related to the actual mass of the connector, a high resistance area for sure.
I would think the contact points on a female connector would be fairly small in surface area related to the actual mass of the connector, a high resistance area for sure.
guys quick question...
I'm considering a build using OS's wonderful creations. It will be a bi-amp build. I've read through ESP's site on biamping and using an active crossover to avoid building a crossover network in the speaker and a few other considerations.
Could consider triamping as well...using an amp per speaker driver. The main idea to pick the most ideal IPS for the job of powering sub / mid / and tweet.
In this context what considerations need to be taken into account when powering a single driver with an amp...for example would you build the amp to be able to provide only 100% power in terms of what the driver can handle or is it useful to overpower the amp slightly?
Would their be gain profile issues...in other words using a different IPS / OPS for each driver would require potentially gain and equalization for each driver as well to get them to work well together?
Any threads someone can refer me to which describes these issues?
I'm considering a build using OS's wonderful creations. It will be a bi-amp build. I've read through ESP's site on biamping and using an active crossover to avoid building a crossover network in the speaker and a few other considerations.
Could consider triamping as well...using an amp per speaker driver. The main idea to pick the most ideal IPS for the job of powering sub / mid / and tweet.
In this context what considerations need to be taken into account when powering a single driver with an amp...for example would you build the amp to be able to provide only 100% power in terms of what the driver can handle or is it useful to overpower the amp slightly?
Would their be gain profile issues...in other words using a different IPS / OPS for each driver would require potentially gain and equalization for each driver as well to get them to work well together?
Any threads someone can refer me to which describes these issues?
Not "slightly" but A LOT !
You need to can provide to your speakers more than the peak power they can handle. Not the continuous one. In fact, it is depending of the efficiency of your speakers, not their power handling.
After this, it is your own responsibility to not destroy the speakers by excessive listening levels where their distortion will be, anyway, excessive for a good listening experience.
If you want my personal advice about witch amp to chose for each way, chose the fastest CFA you can find for your trebles and a CFA too for mediums.
For basses, you can chose any amp with the best damping factor and PSRR and powerful enough. If you can, chose an amp with full DC coupling in the feedback loop.
Just my two cents.
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Hello,
What is the difference between Krypton ND and Krypton C? Is there a chematic of krypton ND ?
Best Regards Gerd
What is the difference between Krypton ND and Krypton C? Is there a chematic of krypton ND ?
Best Regards Gerd
What this thread needs: a good acronym index. I'm never sure whether I'm interpreting them correctly, and there are a LOT of them!
That is what I said some days ago, but there is a active crossover circuit needed to implement something like that. Who will bell the cat.
Most mice will have an idiosyncratic and unruly cat that won't take to just any ol' bell. Some will need fourth order high pass bells combined with fancy-pants notch filtering tinkle bells, with some big butt tubular bells for the low pass with even some more fancy baffle bells. Sounds like fun. First comes four,six or eight channels of amplification (for stereo). I'm building the amps. I've got the x-over boards, Saving my pennies for drivers. Don't wait for me, it'll be awhile.
I have not done this , and don't know offhand any related threads.
In the case of a biamped system , slew IPS's are 27X gain by default.
I sort of have a "biamped system" (sub/full range).
The bass amp can be overcompensated , have a more aggressive PS ...
lower input filter R/C.
Without any crossover components , I would be afraid to direct connect
any mid or tweeter directly to any DC coupled amp. Maybe with a
fine tuned protection circuit that would really allow nearly 0 DC (<50mv).
Most slew IPS's settle quickly and are servo'ed ... they "end up" (after 2 sec)
with 0 !! mv offset.
The CFA'a are better for HF , The VFA's seem to excel on the bass. Just
my humble observations.
The spook (VFA)seems to be the best of both worlds , and the Kypton ND
should be it's equivalent on the CFA side. These IPS's cross into each others
"territory" in the speed/ LF SQ realms.
OS
C = a capacitor coupled DC CFA amp. Almost "mesmerizing" mid/HF SQ.
ND= an extra stage (diamond buffer). Full DC (no cap) servo perfection.
This one is faster , more accurate.
Both use the super pair cascode. Self clamping , non saturating perfection.
You could overload this IPS for it's 20 year life non-stop - BOMBPROOF !
I really want to audition the ND .... I think it is SOTA for its class.
Bonsai's NX amp is it's "little brother". Lazy cat don't like either the
NX or this one - good enough for me !!😀
OS