Bora is a nice guy from Serbia - Yugoslávia

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#561
boraomega said:
Something is very wrong in your unit Duran!!! How do you explain that you have measured +36,5V across ZD2 (that voltage is OK) but then only +1,2V on the upper wire of the 68k resistor? That is the very same wire!!! Also, you have +13,3V across ZD3 when you should measure -13V there (voltage there should be negative with respect to ground!).

For your info, that unit has been done successfully at least several hundred times up to now… “Viktor1986” is one of them, he can tell you that.
Click to expand...

Dear Dr. Bora

First off all I want to present thanks for your quickest kindest reply to you.
I'll check again all voltages and parts once more. Do you have any pre-test procedure of it before the hook up into amp. different then checking the voltage and finding the wrong parts??
Best regards
 
#565
Omni pict.

Here is the other pict.
Thank you very much in advance
 

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#568
It seems all OK in the picture. No you can get a voltage of 13V where there are marked, there must be -13V DC. I have personally made several omni protections and there are no mistakes, except of course if you're somewhere wrong around the value resistor or perhaps a faulty components.

How many volts are relays and that resistance spool? What is the value of the resistor that goes to the entrance LM7824, from +66 V to the input 7824?

There is no need to send you anything because you found on that link.
 
#573
dr Bora i am bit confused about which amp to make from ur site ????????? I scaled it down to studio or studio SE ....... wat is difference between them ??? which is more Sonically pure ....... I got pcb layout for studio but could nt find for studio SE in ur site can u plz give us pcb and the other required construction tips


regards
sekhar
 
#574
Sekhar, what is causing your confusion? How do you performed “scaling down”… what criteria was used?

Difference between Studio and StudioSE is in two stabilizing stages in supply rails of voltage stages. Sonically, some people prefer older version but other prefer newer SE version… it is hard to say and it depends on your personal preferences and quality and characteristics of the remaining components of your home system.
If you definitely decide to build StudioSE, I can give you PCB and layout files directly on your E-mail.

There is nothing in this design that will call for special instructions or procedure. It seems people are too often driven to build some designs only by availability of extensive documentation, explanations and who knows what else. In many threads where someone is asking for a list of good quality designs or amplifiers, one of the main arguments to provide high ranking is “it is well documented”, but that is not guaranty that it is superior design. . That might make life of a less experienced or less knowledgeable builder easier, but it is not a factor that determines quality and sonic performance of one design.
 
#575
i scaled down to studio because many had said it is a very good sounding amp ......... and the THD figures r also good it also fall within the power range that i want to make .......... sir, wat would u personally recommend for a 80-100W rms amp .... in terms of sonic clarity ...... and my email id is ardhendu.san@gmail.com kindly send the studio Se pcb & layout scheme







regards
sekhar
 
#577
Just a good mention , If I could not design my own , I would build an OMEGA amp. I wonder why this thread only has 80k views. Besides the symasym (535k views -#1 small class B - finally), this SHOULD be #2 for sheer design excellence.

Very good work !! 🙂
OS
 
#578
Thank you OSTRIPPER for such nice and high opinion regarding my designs. It means a lot when it is coming from another designer of respectable class. I sincerely appreciate that because my approach, education and attitude don't allow me to do anything that could bee seen as self-promotion... other people should talk about you and your work. I am happy to see small but steady increase in number of people recognizing my work!
 
#579
Dr. Bora;

I second ostripper's praise of your amplifier 🙂. I also agree with your comments about the 'builders' here - apexaudio is getting inundated with a barrage of questions from peepul who refuse to build the excellent designs he has so kindly provided. Peepul, if you want to change/customize someone else's design, be kind enough to not ask totally stoopid questions - there are PULENTY of designs here for everyone's fetish...
 
#580
ostripper said:
I wonder why this thread only has 80k views. Besides the symasym (535k views -#1 small class B - finally), this SHOULD be #2 for sheer design excellence.

Very good work !! 🙂
OS
Click to expand...

Bora's designed amps are to be(JBL) "Just Build & Listen".

I was playing with MODUS amp which has been succesfully matched and synergized with TDL transmission line speakers and Onkyo CD player.
Awfull performace which reminded me of a valve amp set-up I listened few years ago.

Now I am building LAMBDA which will be soon to complete.

I do have build other amps like the said famous threads with ten of thousands of hits. They do sound good. Well for me Bora does it Better.

Cheers.......Raj.
 
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