I have leave my town for a little rest.Almost as bad as the "spooky".
Almost gave up on it. -- HULK SMASH FILTHY DIYA AMP !! 😀😀
Sort of redesigned it ...as I almost "gave up on it".
Came up with a deluxe VFA that will please even the guru's.
20hz - .5ppm
200hz - .5ppm
2k- 1ppm
10k - 3ppm
20k-4ppm
220V/uS slew ..
Good enough for me !
Servo'ed it (of course).
Had to use EVERY sq. CM of the board (85 parts).
Even thermally compensated the CCS and referenced the servo from
the lifted ground (not G2).
We have a "lab amp" here. 😀
New schema and I will release the artwork tomorrow. (GLA lovers rejoice) !
This is the new "champ" (3)
This will be the last 😱 VFA contribution to this thread.
Next is the "eyesee" , a CFA IC based design.
OS
I see new IPS .
Terry this VFA is a job for you now.I'm back in the end of the week.
I will try to read this thread every day.
Good luck to " Vzaichenko edition" VFA.
Best regards
Looks like I have all the parts so I just need the foil etch pattern so I can make a couple of boards.
Blessings, Terry
Terry:
Please tell what you have HEARD in the differences IF any of ALL the ones you have built.
You are a IPS factory, and thanks for ALL the sharing you do.
Please tell what you have HEARD in the differences IF any of ALL the ones you have built.
You are a IPS factory, and thanks for ALL the sharing you do.
Well , here you go .... "mr. IPS factory". I am warmed up, now.
Had a snowstorm/power failure ... knocked back to the 19'th century
for 2 days 😱 .
You would be the first to tackle this type input stage ... I found no
others on DIYA besides vzaichenko's .
OS
Attachments
That original design was flawed , as are the other ones posted here.
I will put out a original redesigned IC based CFA - I am working on it now.
OS
Yes , a kind member is shipping me a great case for the slews.
I have -
- a "lesser" 35-0-35V 500va toroid.
- boards (too many - 2 pair badgers/2 pair slew 5P/1 pair 2P)
PS- I'll trade all 4 Badgers for parts (2 are stuffed).
-4 of the 8200u 100v sanwha apex caps(vender), not enough for
2 amps (I would trade them,too) , he don't sell them anymore 🙁 .
-2 -35A/400V bridges
- 2 really great pair of speakers and a subwoofer/with case (needs amp).
- I don't have semi's/passives.
Last time I DIY'ed I had the genesis case-PS (too big/heavy) and toner
boards. This time - no foolin' around , OEM quality ... protection
(and a slewmaster sub/amp !)
I'm still short one burned out PC from the move - my son needs his games (motherboard instead of a mouser order)🙄 .
OS
- a "lesser" 35-0-35V 500va toroid.
- boards (too many - 2 pair badgers/2 pair slew 5P/1 pair 2P)
OS[/QUOTE]
You need a "man sized"
toroid to go with those 5 pair output boards! I couldn't even test properly with a 35-0-35V.
- boards (too many - 2 pair badgers/2 pair slew 5P/1 pair 2P)
OS[/QUOTE]
You need a "man sized"
toroid to go with those 5 pair output boards! I couldn't even test properly with a 35-0-35V.
Well, for a 2-pair one it will be fine (35V AC --> almost 50V DC)...
It's not going to be a "concrete crasher", but more than enough for home listening 😉
It's not going to be a "concrete crasher", but more than enough for home listening 😉
"You need a "man sized"
toroid to go with those 5 pair output boards! I couldn't even test properly with a 35-0-35V."[/QUOTE]35-0-35 V A.C gives about 50V D.C . Absolutely satisfactory for Slewmaster if we haven't a bigger transformer.
PS Hi vzaichenko we type at the same time.🙂
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Yes , that would do about >60-0-60Vdc .
My case is (W)300*(H)138*(L)360 mm (internal) . What are the trafo
dimensions ?
OS
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Excellent ,send this to him who gave us everything!
I get a "real amp" and I will have incentive to design protection and
power supply circuits , too.
Not "plain ones" ,either.... (deluxe /universal/foolproof ones 😀).
OS
Valery has a very cool protection circuit already designed. It takes care of soft start as well. Arduino brain to run it all. I have a spare board if you want to try it out.
I'd like to read about that "vzaichenko Arduino". Even as I would try to
avoid something unique or proprietary - I would like to see firmware control
the protection.
PS - I read some of Valery's threads looking for "arduino" - My respect
for him is mutual - VERY precision designs and builds !! 😱
OS
avoid something unique or proprietary - I would like to see firmware control
the protection.
PS - I read some of Valery's threads looking for "arduino" - My respect
for him is mutual - VERY precision designs and builds !! 😱
OS
With an Arduino and some additional interface circuits, you could control the bias of an amp "intelligently" also. Then add the protection and AC power control, such as zero crossing and opto-isolation. Lot of good stuff. It is coming just like 3D print is.😱