Will anyone create some boards we can purchase as a group buy for those of us who don't have the supplies or knowledge to produce or own boards. This looks like a great design that has so much capability and the variation in output power for the three designs should cover any need we may have. I know I would purchase some boards if offered.
This is why I do a V1.2 now.
Prototype ran first time (NAF) ... but we had to make sure.
Many current DIYA projects are having problems now (I WON'T elaborate).
PCB before the "bugs " are worked out
.I DON'T want this !!
The OPS is "good to go" - any takers for a batch o' chinese FR-4 ... I'll
give up the gerbers !
This IS the "cat's meow" for fickle builders who like to build a amp
a month to find the better "sound". you can make this into ANY
DIYA class AB amp.
OS
EDIT --- WOW !!!!!View attachment 401422
Which tests do you want made?
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THx-RNMarsh
If I can get some PCB's made , you will get some
.Me, NAF , Bimo ... just have DMM's/oscilloscopes
.PS - step 1 is done , they work and are stable. Step 2 - housekeeping and documentation (and a few more builds).
OS
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View attachment 401422
Which tests do you want made?
[click on picture to see it larger]
THx-RNMarsh
WOW
The only things you need to add to these are a Time Domain Reflectometer, a 5 Gigahertz 4 channel scope and a CAT-6 continuity tester. WOWDo you consult for NASA or NSA?
Final deal - (this weekend)
3-4 IPS's
1. NAF's "NADv1.2" with servo -
He says "wonderful" sound , 1mv offset, runs the OPS bias within a mV.\
I say "good to go" - tiny tweak to layout.
2."HB/wolverine" we KNOW this works - read the Badger thread. "war dog amp"
"good to go"
3." VSSA variant" (I'm doing this now - multitasking) Very similar to the
NADv1.2 - 99.9% chance it will work just as well .... it is a far less
involved circuit - super simple .... sure bet !!
4. I might get to the "symasym" , it also - is one that I have already
built. Another sure bet. (this one is a great subwoofer IPS !!)
This can not beat the CFA's or HB/wolverine THD20 , but has the ONLY
10ppm 20HZ !
(below)
4 IPS's for many applications , all have different "personalities".
PS - NO infringements - my circuits are "bastardized" enough as not
to be like the others. Most designs are hybrids of several designs - ALL
fair game , no "prior art"
I will integrate any good idea .OS
Attachments
2 and 2 - just like the thread states "rumble"...
HB/wolverine and symasym are VFA.
NAD and "CFA-X" (below)are CFA.
CFA-X is dirt cheap ... amazing - 25ppm/90db PSRR /2mv offset - great CFA
"starter amp"
.ALL are 4-5ma VAS's , can be directly swapped out
to the OPS , might not even have to adjust the OP bias.
OS
Attachments
Yes uncle .. i will try it as this modular design will make an easy and fast build. Thank you very much for your effort and support.
The "Wolv" will my next build..
Yes ! Bimo did the "wolv" , perhaps we can "refine it".
Excellent screen printing - do you spray to make it stick (adhere) ?
OS
No spray, clean the surface with paint thinner, just flip the screen and photocopying it on thin ex sticker paper
On shiny surface. Or use transparant photocopy mica/plastic.
View attachment 401422
Which tests do you want made?
[click on picture to see it larger]
THx-RNMarsh
Oh my god!