Actually I had bought two full groups of 4P+4N with same Idss.
I still have one complete 4P+4N and second one that has been partially scavenged for another project and left in this one is 2P+2N.
Do
I still have one complete 4P+4N and second one that has been partially scavenged for another project and left in this one is 2P+2N.
Do
in that case , save these for something in future and wait to get J271 from me
I never thought I'd see so many resistors in an amplifier! LOL!
This is just a single channel but it looks pretty! 😀
The boards have not yet been cleaned but soon...
Unfortunately, in my head I was thinking "I need to double that BoM", but for the output stage BoM I needed to quadruple the BoM... Then the inevitable arrived, Mouser and just about everyone else is out of the 1R5 3w resistor I bought... There was a boat load when I ordered but now... All gone.. I'm still getting 30 of them but will be missing 50. This will stall my projects for weeks... But at least I'll have a single channel running! 🙂
Ciao!
Do
This is just a single channel but it looks pretty! 😀
The boards have not yet been cleaned but soon...
Unfortunately, in my head I was thinking "I need to double that BoM", but for the output stage BoM I needed to quadruple the BoM... Then the inevitable arrived, Mouser and just about everyone else is out of the 1R5 3w resistor I bought... There was a boat load when I ordered but now... All gone.. I'm still getting 30 of them but will be missing 50. This will stall my projects for weeks... But at least I'll have a single channel running! 🙂
Ciao!
Do
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Yeah, I know... LOL!
I started working on the I/S last night, both PCBs are almost done. Will post picture later!
Ciao!
Do
I started working on the I/S last night, both PCBs are almost done. Will post picture later!
Ciao!
Do
Coming along nicely..!
Resistors are mainly my preferred TAKMAN Metal Film, Some Vishay Dale, Some Vishay MRS25...
@ZenMod
I'm trying to find some TAKMAN Metal Film 250K for R9 and R47 but can only find 220K and 270K. If the value is very critical, I'll keep the resistors I have in place and if I can get 220K or 270K without affecting the sound signature of the amp, please let me know.
Do
Resistors are mainly my preferred TAKMAN Metal Film, Some Vishay Dale, Some Vishay MRS25...
@ZenMod
I'm trying to find some TAKMAN Metal Film 250K for R9 and R47 but can only find 220K and 270K. If the value is very critical, I'll keep the resistors I have in place and if I can get 220K or 270K without affecting the sound signature of the amp, please let me know.
Do
One more thing... 🙂
On the LED strip, the mark (little dot) is I assume for the cathode?
Thanks
Do
On the LED strip, the mark (little dot) is I assume for the cathode?
Thanks
Do
gain ratio is mainly set with 250K/15K
so you can go up and down with both values , trying to keep same ratio
so , 270K/16K ........ 220K/13K but - practically - not much difference in 250K/15K and 270K/15K , so go for it
though .... in amp of that size , with plenty other things more influential on final sound - I couldn't hear much of difference between plain metal films and fancy resistors
always take in account my life in Africa , spending time with elephants ; they're farting extremely powerful!
LEDs- anodes are looking at R18 and GND ; decipher ......... (little dot is more like little c) 🙂
so you can go up and down with both values , trying to keep same ratio
so , 270K/16K ........ 220K/13K but - practically - not much difference in 250K/15K and 270K/15K , so go for it
though .... in amp of that size , with plenty other things more influential on final sound - I couldn't hear much of difference between plain metal films and fancy resistors
always take in account my life in Africa , spending time with elephants ; they're farting extremely powerful!
LEDs- anodes are looking at R18 and GND ; decipher ......... (little dot is more like little c) 🙂
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Made some progress on the build last week but awaiting my last batch of source resistors... If you build it, they will come! But it should be reversed! 🙂
Hi ZenMod,
on the IPS, ZD1 and ZD2 is supposed to be 7V5 Zener 500mW+. Will replacing this with a 9V1 500mW Zener be ok or it will affect sound signature? Honestly I don't mind ordering some of them but I had the 9V1 in stock, along with 5V1, 10V, 11V, 12V, 15V, etc...
Did you get a chance to chip those nice J271? 😀 😀
All the best!
Do
on the IPS, ZD1 and ZD2 is supposed to be 7V5 Zener 500mW+. Will replacing this with a 9V1 500mW Zener be ok or it will affect sound signature? Honestly I don't mind ordering some of them but I had the 9V1 in stock, along with 5V1, 10V, 11V, 12V, 15V, etc...
Did you get a chance to chip those nice J271? 😀 😀
All the best!
Do
7V5 , must be , that's Aleph CCS anti-glitch thingie
sorry , mea culpa for remembering these J271 only late at night
will scribe down in list now ......
sorry , mea culpa for remembering these J271 only late at night
will scribe down in list now ......
some fun reading attached , Kudos to A.W. Newby
zenner voltage changed by yours truly , original 5V6 being optimized for his amp , 7V5 for big one
you can use 5V6 , it'll cut mildly in peak dynamics of Aleph CCS
zenner voltage changed by yours truly , original 5V6 being optimized for his amp , 7V5 for big one
you can use 5V6 , it'll cut mildly in peak dynamics of Aleph CCS
