1/2 Done but sounds GREAT!
Sorry it took so long to post some 1/2 done pics but I'm finishing three projects right now.
Currently I am enjoying this, mostly done NuTube through a freshly built Aleph J amp. WOW! is all I can think or say. Seriously I'm stunned at the detail this tube is capable of producing. Currently I have the bias set a 10.0 volts. I have had it as high as 10.5 volts which is nice for a cd input. Right now i am enjoying Johnny Cash Amerirican Recordings on vinyl and Johnny sounds like he's in the room! The buzz of partially depressed strings has never sounded so sweet or clear.
Thanks Algar-emi for a Great Board!
Sorry it took so long to post some 1/2 done pics but I'm finishing three projects right now.
Currently I am enjoying this, mostly done NuTube through a freshly built Aleph J amp. WOW! is all I can think or say. Seriously I'm stunned at the detail this tube is capable of producing. Currently I have the bias set a 10.0 volts. I have had it as high as 10.5 volts which is nice for a cd input. Right now i am enjoying Johnny Cash Amerirican Recordings on vinyl and Johnny sounds like he's in the room! The buzz of partially depressed strings has never sounded so sweet or clear.
Thanks Algar-emi for a Great Board!
Attachments
Still a few extra pcb left. Send me an email if interested. This last batch has the small pcb errors corrected and much larger spacing between L and N traces as recommeded by some members, so it should work perfectly out of the box. Numerous builders confirm so far that the PCB is correct. Thanks
SB
SB
Hi Algar,
I have a few questions for you...
- I have Rev1.4 of the PCB and was wondering if post 119 and 121 issues were fixed?
- I'm using J113 from Pass kit in DIYaudio store (came with J-R1 as well). I tested the PSU before adding R107, 103, 207, and 203 and the PSU voltage were just fine. Added R107, 103, 207, and 203 and then SMPS has started to pulse, 5V pulses. This means there is possibly a short. Now that the parts in place, I cannot see the traces properly. Seems like there is a possible pinout/traces wrong on the J113. Could you please look into it?
Anyone has done J113 assembly?
Thanks
Do
I have a few questions for you...
- I have Rev1.4 of the PCB and was wondering if post 119 and 121 issues were fixed?
- I'm using J113 from Pass kit in DIYaudio store (came with J-R1 as well). I tested the PSU before adding R107, 103, 207, and 203 and the PSU voltage were just fine. Added R107, 103, 207, and 203 and then SMPS has started to pulse, 5V pulses. This means there is possibly a short. Now that the parts in place, I cannot see the traces properly. Seems like there is a possible pinout/traces wrong on the J113. Could you please look into it?
Anyone has done J113 assembly?
Thanks
Do
Mine is just SMPS pulsing 5-6 Vdc on and off as if the output is over-current or shorted, but it is not shorted... Just wondering if there's too much capacitance on the output of the SMPS. They sometimes do that... I will remove the SMPS module and power it using my lab bench PSU.
Algar, any other hints?
Thanks
Do
Algar, any other hints?
Thanks
Do
Yes, and in this case, this SMPS is having a hard time charging those caps with the load attached. Trying with the bench supply I can get things working and voltages are reading fine.
Algar_emi, did you get everything running with that SMPS and the caps in your BoM or did you have to change cap values and lower the total capacitance?
My bench supply seems to indicate ~75mA with everything working at 23.98Vdc. If that is the case, maybe I need to leave the SMPS pulse for much longer but it does not seem to be able to charge more than 5-6Vdc.
I'll put everything under sine wave and see on the scope if it is properly alive.
Do
Algar_emi, did you get everything running with that SMPS and the caps in your BoM or did you have to change cap values and lower the total capacitance?
My bench supply seems to indicate ~75mA with everything working at 23.98Vdc. If that is the case, maybe I need to leave the SMPS pulse for much longer but it does not seem to be able to charge more than 5-6Vdc.
I'll put everything under sine wave and see on the scope if it is properly alive.
Do
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