Sa +/-48V ne znam koliko ce snage dati, to ce se videti na osciloskopu a i ne patim od toga da li je 80, 90 ili mozda 100 vati! Ako imas volje radi Sigmu! Iz kog si kraja?
From me you can not get the PCB and layout, it is not my intellectual property, please send email to Bora.
Iz Beograda, na "privremenom" (16 godina) boravku u Vankuferu B-)
I got Sigma schematic from Bora's site and contacted him in meanwhile, but he is probably bussy now. I didn't get his reply in regards of PCB and layout yet.
I have small speakers and don't want to burn them with too much amp power, that is why I asked about the output.
Hvala lepo B-)
I got Sigma schematic from Bora's site and contacted him in meanwhile, but he is probably bussy now. I didn't get his reply in regards of PCB and layout yet.
I have small speakers and don't want to burn them with too much amp power, that is why I asked about the output.
Hvala lepo B-)
Bora is great.... Viktor is great too.
Enjoy nice amplifiers from Borivoje Jagodic... a dear friend.
regards,
Carlos
Enjoy nice amplifiers from Borivoje Jagodic... a dear friend.
regards,
Carlos
"Enjoy nice amplifiers from Borivoje Jagodic... a dear friend."
I hope I will, but, as you know well, it is a long jurney, especially for the guy who tried (and failed more than successeded) it more than 20 years ago.
Cheers,
Marin
I hope I will, but, as you know well, it is a long jurney, especially for the guy who tried (and failed more than successeded) it more than 20 years ago.
Cheers,
Marin
Sigma amp
Hi Viktor,
I am interested in building the Sigma. You must like the sound as you are building the second or third set with top-quality components.
I noticed that you have an extra transistor (Q7) on your PCB. I downloaded the schematics from Dr. Bora's site, it does not have this TO126 transistor.
Are you using a newer version of Sigma schmatics?
Best regards, Stanley
Hi Viktor,
I am interested in building the Sigma. You must like the sound as you are building the second or third set with top-quality components.
I noticed that you have an extra transistor (Q7) on your PCB. I downloaded the schematics from Dr. Bora's site, it does not have this TO126 transistor.
Are you using a newer version of Sigma schmatics?
Best regards, Stanley
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Yes Stanley, I use a newer version od Sigma amplifier, different values of some components and reduced power supply make this new version. Electrolytes at 100V are expensive and difficult obtainable, that's why I decided to work on + /-48V DC using electrolytes of 63V.
Bora is a REALLY nice guy B-)
Something went wrong with my email communication with Bora (who definitelly IS a nice guy) so I FINALLY got completed documentation for Sigma from him. Now it is my turn to prove that this is not done in vain.
Cheers i HVALA, Marin
Something went wrong with my email communication with Bora (who definitelly IS a nice guy) so I FINALLY got completed documentation for Sigma from him. Now it is my turn to prove that this is not done in vain.
Cheers i HVALA, Marin
Thanks Viktor,
I will email Dr Bora for the new version of schmetics & PCB.
Cheers, Stanley
Hi guys,
I have some questions related to the the Sigma "project" that I am planning, here they are:
- Which pre amp would pair nicely with Sigma, is Clepsidra good enough or Bora/Victor would recomend something else? On Bora's web site, there is a FlatBT as well but there is no enough details about it.
- I need a Phono pre amp as well so I was thinking about the one Carlos posted here on this forum. How that one will fit into the overall picture?
- Also, as I mentioned, I am starting from the scratch and havent done electronic diy for a while (do not mention years here B-)) so I need some help/explanations/leads about elements pairing for Sigma (pre and phone amp too).
Thank you,
Marin
I have some questions related to the the Sigma "project" that I am planning, here they are:
- Which pre amp would pair nicely with Sigma, is Clepsidra good enough or Bora/Victor would recomend something else? On Bora's web site, there is a FlatBT as well but there is no enough details about it.
- I need a Phono pre amp as well so I was thinking about the one Carlos posted here on this forum. How that one will fit into the overall picture?
- Also, as I mentioned, I am starting from the scratch and havent done electronic diy for a while (do not mention years here B-)) so I need some help/explanations/leads about elements pairing for Sigma (pre and phone amp too).
Thank you,
Marin
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Based on Boras recomendation I am going with FlatBT, will bug you and other guys more, when time comes B-)
This is still in a planning phase so it will take a while before you can see any decent updates from this project B-(
________________________________________________________
Disclamer:
The information in this transmission is intended to be totally worthless and devoid of any benefit to anyone with the exception of, possibly, the intended recipient. If you received this communication in error or if you accidentally read it when it wasn't addressed to you, then please immediately delete all of your saved game files and email addresses and then energetically beat yourself about the head and shoulders with a recent technology publication of your choice. All other more intelligent actions taken in response to this information are prohibited, so there.
This is still in a planning phase so it will take a while before you can see any decent updates from this project B-(
________________________________________________________
Disclamer:
The information in this transmission is intended to be totally worthless and devoid of any benefit to anyone with the exception of, possibly, the intended recipient. If you received this communication in error or if you accidentally read it when it wasn't addressed to you, then please immediately delete all of your saved game files and email addresses and then energetically beat yourself about the head and shoulders with a recent technology publication of your choice. All other more intelligent actions taken in response to this information are prohibited, so there.
My Sigma Build
Hi,
Dr Bora has been very helpful to provide me with the PCB layout & answered my questions.
I am building the Sigma lateral-MOSFET amplifier. I bought the Sanyo 2SA1407/C3601 from RS-Components and 2SK1058/J162 from Tayda. I have the other components in my parts bin.
Attached is the pictures of the partly populated board.
Cheers, Stanley
Hi,
Dr Bora has been very helpful to provide me with the PCB layout & answered my questions.
I am building the Sigma lateral-MOSFET amplifier. I bought the Sanyo 2SA1407/C3601 from RS-Components and 2SK1058/J162 from Tayda. I have the other components in my parts bin.
Attached is the pictures of the partly populated board.
Cheers, Stanley
Attachments
Hi Viktor,
Dr Bora send me the PCB layout for TO3 devices and I did this PCB layout based on his layout & the pictures that you posted earlier. I wanted to use two ground connections to the PSU (the green-yellow wire is the ground for the Power-MOSFET, and the blue wire near the input connector is the ground for the voltage amplification section). The Sigma is a relatively simple design with 4x SSTs & 4x TO-126s so it did not take me long to do the PCB.
I bought my 2SC3601 & 2SA1407 from RS Australia | World Leading Distributor of Electronics, Electromechanical and Industrial Components, and they costs $1.14 each and minimum quantity is 5 pieces. I tried to find out the Euro pricing and found that RS does not sell this Sanyo parts in UK or Germany.
The 2SK1058 & 2SJ162 costs $3.50 each from Tayda in Thailand, it took almost one month for the parts to arrive. As far as I can tell, they are the genuine Renesis parts.
Cheers, Stanley
Attachments
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