Juma's Easy-Peasy Capacitance Multiplier

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V

vilding

Member
Joined 2020
Hi!

I'm trying to assemble the single rail version shown in the first post for an amp and just want to make sure I've got everything right.

Where on the mosfet do I connect the 220r and where do I connect ground/v- to the amp?
 

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prasi

prasi

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Joined 2014
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thimios said:
Always generous:)
Click to expand...

I had the sch ready, it just took 5 mins and I wanted to help out a new person.

Good to see you are still active on diya my friend...

had I sent you already my new PRAKSA55 amp pcb?
its too good and one other member who tested it said its within 3rd best amp he ever built till date... All credit goes to the one and only Hugh Dean...
 
T

thimios

Member
Joined 2009
prasi said:
I had the sch ready, it just took 5 mins and I wanted to help out a new person.

Good to see you are still active on diya my friend...

had I sent you already my new PRAKSA55 amp pcb?
its too good and one other member who tested it said its within 3rd best amp he ever built till date... All credit goes to the one and only Hugh Dean...
Click to expand...

Hi my friend, i don't know, is this the one that i had debug about a year ago?
Stay safe my friend! Just now i see bad very bad news from India.
India ended up from medical oxygen?
 
prasi

prasi

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Joined 2014
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Paid Member
BRN said:
Can I use the Cap-Mx in a low powered project? I have one availed from a M2 amp and want to use it for a BA-3.
Click to expand...

Yes, there is a smt version with to-220 components, xrk built it.

passive420 has a nice crc+cmx+regulator version which he is quite pleased about. just check with him for a pcb.

Juma's Easy-Peasy Capacitance Multiplier
 
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prasi

prasi

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Joined 2014
sites.google.com/site/analogdesign1234/
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thimios said:
Hi my friend, i don't know, is this the one that i had debug about a year ago?
Stay safe my friend! Just now i see bad very bad news from India.
India ended up from medical oxygen?
Click to expand...

yes the situation is bad here, but i am ok, just had first shot of vaccine.
yes, its the same amp, with newer version with some changes..
 
J

joensd

Member
Joined 2002
prasi said:
had I sent you already my new PRAKSA55 amp pcb?
its too good and one other member who tested it said its within 3rd best amp he ever built till date... All credit goes to the one and only Hugh Dean...
Click to expand...
What is this exactly? Is it like the baby aksa Greg posted?
Very curious cause I just populated 2 of the baksa board and wonder what schematic you used.
Thank you.
 
T

thimios

Member
Joined 2009
prasi said:
yes the situation is bad here, but i am ok, just had first shot of vaccine.
yes, its the same amp, with newer version with some changes..
Click to expand...

So it is a new amplifier, no i haven't this.
I can't remember if i have sent you any test from the old version. :confused:
I remember clearly that it is a very good sounding amplifier.
I had first shot of vaccine a month ago too.
thimios.
 
S

strawa

Member
Joined 2004
Juma's capacitance for A class testing, made it last night on the board for easier handling. I have been using it for a few years in p2p form.
 

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J

jimk04

Member
Joined 2018
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I don't know whether I fried anything.?!
Wired up the positive side alone and all good.
Was a bit confused how to wire the negative side and I thought I'd beeped it out correctly so I tried the neg side with BR - to GND(BR2) and connected my BR + to V- (BR2).

No magic smoke or anything but no leds .

Did I wire correctly? Could I have killed something if incorrect.?!

Leds on neg rail appear correct orientation

Thanks

Edit......damn! With reference to a photo on post #355 I got it wrong. Will I have blown the transistors? The first big smoothing cap on that rail measures ok. It blew the mains fuse and also blew it again when I correctly orientated the BR wiring. So something is damaged!
 
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