The "goodness" only begins when the party starts. "Party ampz" for " pitchfork villagers".
I'm German , too ... "Vogel" from the Heldeburgs. Fine German engineering (for villagers). he he....
I need to buy my Italian "Dissapante" case. I wanted to make these amps look as good as possible , as well.
I liked how the Infidel came out (the layout) , Symasui should be eye candy , as well. It need 80mm's of room
to take all those compensation options + clip diodes. It , too ... will have 3 colors of LED's that actually (do something)
Very pretty amp.... (below) will be my sub amp. These are the final outputs at first post - very pretty.
These should be easier to populate than Wolverine builds. More simple.
OS
I'm German , too ... "Vogel" from the Heldeburgs. Fine German engineering (for villagers). he he....
I need to buy my Italian "Dissapante" case. I wanted to make these amps look as good as possible , as well.
I liked how the Infidel came out (the layout) , Symasui should be eye candy , as well. It need 80mm's of room
to take all those compensation options + clip diodes. It , too ... will have 3 colors of LED's that actually (do something)
Very pretty amp.... (below) will be my sub amp. These are the final outputs at first post - very pretty.
These should be easier to populate than Wolverine builds. More simple.
OS
Attachments
At least for small signal. I notice the SMD semi processes are more refined with better Cob , beta matching ....
That BC817 lineup has <1% matching , Cob of 2pF and 400+ hfe for only $0.30 - what a deal ! Zetex has .1% matched pairs for $1
that will fit my layouts. I simulate with the models for through-hole BC550/560 , they are only <200 gain. SMD should double the
performance and be WAY better matched in a dual package. TSOP-6 is a lot bigger , sort of like a SOT-23 - you can grab them with fingers.
No clipping , less solder, but old school people still want to trade rare semi's , get ripped off by Chinese sources and
design around rare obsolete parts ??
I chose the bigger SMD packages TSOP -6 ,SOT23-3.
Through-hole is best for the big stuff . It is fun in it's own way .... clip, clip - real wire solder , big 60W irons ....
OS
Where you have seen that BC817DPN is a matced pair?https://www.nexperia.com/products/b...sistors/#/p=1,s=0,f=,c=,rpp=,fs=0,sc=,so=,es=
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In the spec sheet , its P-N Hfe curves are nearly opposites. They diffuse them on one die. It's not 2 separate chips in one package.
I've tested typical dual packages on OEM equipment. REAL close. Better than the old japanese TH JFET/BJT dual packages.
The single gender NPN or PNP duals are even closer.
These new SMD semi's are not diffused in some dirty, greasy Chinese slave labor $hithole like most outsourced Through-hole's are.
BC857's are matched , as are a lot of Zetex's. What I'm saying is that a general purpose modern dual SMT is better matched than an officially
matched 20'th century "old school" part.
OS
I suppose better is expected nowadays. Too bad this is not reflected in the vast majority of present day consumer products.
I think this is the case , as a OEM will "nickle-dime" on designs and deratings. As an example , use a hot resistor/zener instead of
the cooler transistor/zener/resistor. Just make it last 1-3 years. My designs would bankrupt a modern OEM based on consumerism.
OS
I think this is the case , as a OEM will "nickle-dime" on designs and deratings. As an example , use a hot resistor/zener instead of
the cooler transistor/zener/resistor. Just make it last 1-3 years. My designs would bankrupt a modern OEM based on consumerism.
OS
Yes, nowdays everything is a toy!
We need to buy again and again.
Nothing is designed to last for a long not to be serviceble.
Cheap to buy but very expensive finally.
We need to buy again and again.
Nothing is designed to last for a long not to be serviceble.
Cheap to buy but very expensive finally.
Short-life planned obsolescence. And they think they can pull off carbon neutral , our base business model calls for even greater
waste and consumption. They would not give up this model without wars and violence , there is NO way to "greenwash" this !
PS - just went out and choked on the smoke , smells like garbage ... can't see any of the mountains that surround me - at all !!!
can barely see the end of the street. Yikes. Feel sick ...
OS
waste and consumption. They would not give up this model without wars and violence , there is NO way to "greenwash" this !
PS - just went out and choked on the smoke , smells like garbage ... can't see any of the mountains that surround me - at all !!!
can barely see the end of the street. Yikes. Feel sick ...
OS
No No , that would depend on the op-amp model. LT's ad744 is a powerhog versus others . still all are 8-10ma per rail. Q1-2 = fjv992 SMD=50mA
These IPS's whole are just 20mA per rail - cold.
yes, q1-2 are at 90mw. I have the amp ,through-hole ksa992/c1845 are cold at 2C above ambient.
Only warm thing is the VAS trannies , 10C (warm). My amp VAS runs at 5+ ma Ic.
Only warm thing is the VAS trannies , 10C (warm). My amp VAS runs at 5+ ma Ic.
Nice to hear you are getting smoked out too. It was hazy today, but no stink at least, need more rain to clean the air a bit. And they need a few steady days of heavy rain on those fires, do your dance.
That's not nice , keep yur smoke to yourself ! The full moon is red now .... biblical..
It actually stinks HARD outside now ! Nasty.
It actually stinks HARD outside now ! Nasty.
My smoke smells a lot nicer and does not give you a headache.
I guess hell on earth is starting out in Canada and spreading around the earth.
Can we please change the billon $ orders for F35 fighter jets to FWB35 water bombers instead? 🙂
I guess hell on earth is starting out in Canada and spreading around the earth.
Can we please change the billon $ orders for F35 fighter jets to FWB35 water bombers instead? 🙂
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@ostripper man I really like that mini arcwelder, heck I'm pretty sure it will drive inefficient small speakers (my favorite type of speaker) beautifully, I'm building your IPS/EF3 designs for sure!!
Thank you very much for your work man... 🍻
Thank you very much for your work man... 🍻
Any suggestions on how I should write the BOM/build guide/description text files.
SMD is new to me , as well. There are other members that do it regularly. Any tips ??
If these work out good , I could build these IPS's whole for <15$ , sell them for 50/pair (all tested).
I coordinated these designs with minimal parts count and value count , most IPS's have @ 10 values.
Just a few higher current devices , most IPS's use <20mA per rail.
Just 5 different semi types -
1. low voltage - high gain duals. (BCxxx)
2. high voltage gen purpose duals - FMBM5551/5401
3. high voltage singles FJV992/1845
4. VAS high current/high voltage
5. LED's and diodes.
These are all in "SMD parts" ZIP.
Nothing special for any passives , just a few 1/2 W parts ... Hellraiser needs 1W's for it's CFA block.
OS
- No fancy pictures , at least till I get to build some !
- Mouser and Digikey part numbers ??
- 1. BOM 2. description/operation and 3. assorted building tips ??
SMD is new to me , as well. There are other members that do it regularly. Any tips ??
If these work out good , I could build these IPS's whole for <15$ , sell them for 50/pair (all tested).
I coordinated these designs with minimal parts count and value count , most IPS's have @ 10 values.
Just a few higher current devices , most IPS's use <20mA per rail.
Just 5 different semi types -
1. low voltage - high gain duals. (BCxxx)
2. high voltage gen purpose duals - FMBM5551/5401
3. high voltage singles FJV992/1845
4. VAS high current/high voltage
5. LED's and diodes.
These are all in "SMD parts" ZIP.
Nothing special for any passives , just a few 1/2 W parts ... Hellraiser needs 1W's for it's CFA block.
OS
You need to move up to a better software package for designing boards! Most will automatically verify the board matches the layout. They will also export a BOM spreadsheet for you and produce a 3D model rendering of the board so you can verify everything fits. That gives you a good start on a build guide.
When it comes to writing the build guide I don't see the need for an 80 page paint by number illustrated guide. No need for paint by numbers. Nobody learns anything that way. If the builder needs that much info they should consider just buying a pre-built module.
I attached one of our build guides to give you an example of how we structured ours. Most builders had no issues working from them. If any info is lacking you will see questions in the forums and it can be added later.
When it comes to writing the build guide I don't see the need for an 80 page paint by number illustrated guide. No need for paint by numbers. Nobody learns anything that way. If the builder needs that much info they should consider just buying a pre-built module.
I attached one of our build guides to give you an example of how we structured ours. Most builders had no issues working from them. If any info is lacking you will see questions in the forums and it can be added later.