Well, we normally try to clearly state MOSFET or BJT. Both are transistors, but different nature. Slewmaster boards were designed for BJT output transistors initially.
hint, for bom's i load into mouser project manager, then enable sharing so others can see and/or edit, use for buying the parts. all they need to do know, is have a way for me to load cam files 🙂 cheers
I usually have the majority of the parts I need in stock and order the remaining pieces I need along with parts for other projects to reduce costs. Buying in bulk saves huge. I'm sure others do the same. For me the project managers and shared shopping carts don't work.
it is meant to be a place to store your bom for shared access. you get to pick and chose what item(s) from the bom you want to buy.
you are not stuck having to order exactly what is in that particular project!!
for mouser or digi-key, i always order over $200, as shipping is free almost next day service, sorry val, i understand your grief in shipping delays.
you are not stuck having to order exactly what is in that particular project!!
for mouser or digi-key, i always order over $200, as shipping is free almost next day service, sorry val, i understand your grief in shipping delays.
I'll have to check that option out sometime. I usually do the $200 minimum too. Newark seems to have some perfectly timed inventory reduction sales so I buy quite a bit of inventory from them too.
you can check it out, all my bom's get loaded.
try this one out
OPC LME49830/LatFet Wire-amp
http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=d36806234b
i even add notes, so that i can keep track of my sub's for back-orders. you can use the notes to put reference designators in there too.
when i build my libraries, i put all the order information (mfr,distributors,second sources) into the part, so that it is easy to input the bom into mouser or digi-key. it saves a lot of time overall if you use the same parts for multiple assemblies.
it so cool to have this capability now!!
try this one out
OPC LME49830/LatFet Wire-amp
http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=d36806234b
i even add notes, so that i can keep track of my sub's for back-orders. you can use the notes to put reference designators in there too.
when i build my libraries, i put all the order information (mfr,distributors,second sources) into the part, so that it is easy to input the bom into mouser or digi-key. it saves a lot of time overall if you use the same parts for multiple assemblies.
it so cool to have this capability now!!
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guys
my heatsinks arrived today and gives me a question. i did not see anywhere on heatsinkusa that they would be bare aluminum, can i i coat these to a black finish without hurting cooling?
and another issue today. found out that my toroids are not traceable.
so got me wondering if i reorder 60-0-60 what does that yield in dc?
my heatsinks arrived today and gives me a question. i did not see anywhere on heatsinkusa that they would be bare aluminum, can i i coat these to a black finish without hurting cooling?
and another issue today. found out that my toroids are not traceable.
so got me wondering if i reorder 60-0-60 what does that yield in dc?
To find out what it yelds in DC, multiply an AC value by sqr(2), which is roughly 1.41
60 * 1.41 = 84.6
this is very good info thanks vzaichenko
thanks os
yes i think it was right around my first question when terry told me 50-0-50 .
i had asked if 500watts could be safely on tap.
some told me i was crazy for that kind of power.
so i ordered 2 625va 50-0-50 which got misdirected or stolen or something.
they were shipped via mail and as of yet not gotten any clue where they are.
so today i think they must have wrote them off and i got a email from the company asking if still wanted them or a refund.
so that got me thinking again about 60-0-60 as i am just after bragging points that i have the most power i can have.
but after all this i want to be a safe and no abuse so that is too high maybe i should stick with 50-0-50 at 73v .
os what power at 8 ohms does 73 yield?
thanks
gordie
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and if a 8 ohm load, P= E squared/R (84.6 sq'd /8) = 900 peak power, or in transformer talk 900VA
so if using 50-0-50
624 pk W , 625va sounds about right according to my math.
the trans spec is for full load and there is a 10-20% no-load to full-load regulation
edit: this is worst case design, assuming sine waves!!
so if using 50-0-50
624 pk W , 625va sounds about right according to my math.
the trans spec is for full load and there is a 10-20% no-load to full-load regulation
edit: this is worst case design, assuming sine waves!!
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My 73 gives me about >400W peaks.( 55-<60Vrms)
With the cascoded input stages , about 130V p-p + max before clip.
PS - had to do this with my 7R resistor bank in water - made
coffee with the water !! 😱
I don't think the 5 pair slew would do that continuous (thermally
or SOA). 250w/8R - per channel is a good conservative rating.
What you have to remember is as you go past 70-75V the output
SOA's drop and the heat increases.
Continuous duty , a 73-75v supply amp might have a much greater
lifespan than a >85V setup. (even with 100V caps all around).
OS
awesome news guys
remember that i'm not a user of that high power . never more then aprox 50 to 70 watts.
these 2 mono slewmonster's will never see full power only at the test stage for no more then 10 seconds.
oh by the way i almost forgot i got my 8ohm 1000w dummy load today as well.
so if 73vdc rails will do 400 peak and is safe to the components i will grin from ear to ear.
i like manly amps and manly speakers
remember that i'm not a user of that high power . never more then aprox 50 to 70 watts.
these 2 mono slewmonster's will never see full power only at the test stage for no more then 10 seconds.
oh by the way i almost forgot i got my 8ohm 1000w dummy load today as well.
so if 73vdc rails will do 400 peak and is safe to the components i will grin from ear to ear.
i like manly amps and manly speakers
it was obvious to me that they are bare extrusions, if you asked they might have got them anodized for you. i know they affor machining too.
i think you can, i do not think it will effect cooling effectivness, just keep the areas where you mount the devices clear of paint.
your choice if paint is worth it, but you are going for looks. gloss black tremclad paint comes to mind.
i know sansui painted their die cast al heatsinks. areas that made contact were free of paint
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yes my sinks are 15" x 6" and will be on the outside of one side of each chassis.
i'm also going for a curly birds eye maple front so the bare aluminum does not look well enough to me. i have a used piece black that looks better when i hold it up to the birds eye.
-Automotive H2SO4 (sulfuric)
-anodizing dye
-regulated 20V+ supply
Link- Anodizing for the DIY crowd
Looks as easy as when I plated PCB's with electricity.
Same danger from the acids. (get out the gloves).
Most likely fumes , as well. Standard "extreme caution" type
project. 😱
OS