Terry,
Those big eye mag setups are nice to use as well.
Once you get your setup figured out and the hang of it, you will speed up and get faster than THT. No comp lead forming, no lead clipping.
Yes, I forgot to say schematic as well well that is know item to being with. Tracing sigs on the pcb has to be the hard way to do it. I like simple things, well to be simple as they should/can be.
Passive SMT are a breeze to change in comparison to THT, esp if you have two hot irons, we are talking seconds here, about the same time as it takes to get my Soldapult solder sucker setup.
No SS marking for a SMT SOD-123. This is my criticism of stock libs that come with all cad pkgs ;-)
Post a pic of your final work.
Cheers
Rick
Those big eye mag setups are nice to use as well.
Once you get your setup figured out and the hang of it, you will speed up and get faster than THT. No comp lead forming, no lead clipping.
Yes, I forgot to say schematic as well well that is know item to being with. Tracing sigs on the pcb has to be the hard way to do it. I like simple things, well to be simple as they should/can be.
Passive SMT are a breeze to change in comparison to THT, esp if you have two hot irons, we are talking seconds here, about the same time as it takes to get my Soldapult solder sucker setup.
No SS marking for a SMT SOD-123. This is my criticism of stock libs that come with all cad pkgs ;-)
Post a pic of your final work.
Cheers
Rick
Can we use MJL3281/1302 or MJL4281/1302 rather than NJW3281/1302 for the outputs?
Thanks, Terry
Thanks, Terry
What kind of compensation are we talking about? I have a bunch of the devices I listed above as well as NJW0281/0302 and MJE21193/21194. I hate to keep buying other devices when these are just sitting on a shelf.
Thanks, Terry
Thanks, Terry
Here's a few screenshots of my PCBs so far... I still have to clean the PCBs but one thing at a time! 😀
Amplifier
Power Supply (note that those main caps are just temporary for testing, Mundorf M-Lytics MLGO will be used in there)
Ciao!
Do
Amplifier
Power Supply (note that those main caps are just temporary for testing, Mundorf M-Lytics MLGO will be used in there)
Ciao!
Do
The black resistors at the amp board are those from Ohmit?
Hoping to find these fets 771-PDTA115ET215 (Mouser)
Hoping to find these fets 771-PDTA115ET215 (Mouser)
You can get them here until no more stock
PDTA115ET,215 - NXP - BRT TRANSISTOR, PNP, -50V, -100MA, 100KOHM / 100KOHM, 3-SOT-23 | Newark element14 Canada
I might have to place an order at Newark, I could get a few more for people interested. I would be splitting the shipping of the order with everyone wanting some since I won't fulfill the 200$ minimum free freight order. I believe their shipping is 8$ so not expensive when splitted. Maybe I can get some other parts as well.
Thanks
Do
The black resistors are Vishay but they do look like Ohmite I must admit. I'll get the part if you need.
Ciao!
Do
Sorry, the REzts are bipolar, not FET.
I will have to look for equivalents tomorrow - Rohm is the best bet.
Pinocchio, those caps on your PSU board look Waaayy too small.
Can you tell us what the value is?
You need 22mfd - don't dkimp on those because it will affect the sound.
Otherwise, nice looking build!
Great to see these nx-Amps coming together!
😎
I will have to look for equivalents tomorrow - Rohm is the best bet.
Pinocchio, those caps on your PSU board look Waaayy too small.
Can you tell us what the value is?
You need 22mfd - don't dkimp on those because it will affect the sound.
Otherwise, nice looking build!
Great to see these nx-Amps coming together!
😎
Hi Andrew,
Could you answer my question about the outputs. What kind of compensation would be required to use the MJL outputs in place of the NJW's?
Thanks, Terry
Could you answer my question about the outputs. What kind of compensation would be required to use the MJL outputs in place of the NJW's?
Thanks, Terry
Do,
Order for me 20 pieces of those transistors.Gonna look if I need some other stuff
Newark is that the same as Farnell
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Terry, there should not be any changes required to the thermal or loop ompensation. You can go ahead and use them.
Regards Andrew
Hi meanman1964,
Yes Newark is a division of Farnell for North America. I'll place the order tomorrow so if you need anything else, just let me know.
Thanks
Do
Hi Bonsai,
Actually just on top of the PSU picture I wrote they were temp caps, just for testing the PSU to ensure everything is working properly. Is there a test we can do to check all functions of the PSU before actually using it? I guess it is in the manual?
Here's the caps I will use
Ciao!
Do
some people have asked for the BOM lists in Excel format.
Here they are. I've also put links on both the sx and nx-Amp pages on hifisonix.com.
Note the CCTs in the Excel file are just for reference - use the ones in the write ups. The BOM lists are the ones that are printed in write -ups so you should be good to go.
nx and sx Amplifiers BOMs | hifisonix.com
😎
Here they are. I've also put links on both the sx and nx-Amp pages on hifisonix.com.
Note the CCTs in the Excel file are just for reference - use the ones in the write ups. The BOM lists are the ones that are printed in write -ups so you should be good to go.
nx and sx Amplifiers BOMs | hifisonix.com
😎
nx and sx BOM
Thank you bonsai, this is what I've been waiting for when I posted a question on your website. This will help would be builders in having a worry free ordering.
I'm a newbie and my first DIY amp is a LM1875 which I never finished due to limited resources that time. Recently my orders for a stereo set at ebay arrived, I'm now in the process of consolidating parts that I have and parts that will need to be ordered at Mouser.
Now suppose I would like to increase the output to let's say 200w @ 4ohms what is the necessary steps or rule that I should follow to make it possible?
Would increasing the number of outputs and rail voltage would suffice?
Any feedbacks or insights will be highly appreciated.
Thank you bonsai, this is what I've been waiting for when I posted a question on your website. This will help would be builders in having a worry free ordering.
I'm a newbie and my first DIY amp is a LM1875 which I never finished due to limited resources that time. Recently my orders for a stereo set at ebay arrived, I'm now in the process of consolidating parts that I have and parts that will need to be ordered at Mouser.
Now suppose I would like to increase the output to let's say 200w @ 4ohms what is the necessary steps or rule that I should follow to make it possible?
Would increasing the number of outputs and rail voltage would suffice?
Any feedbacks or insights will be highly appreciated.