Update.
I powered it up today and everything seems to work okay, relays are switching and I see ac when touching inputs, no measurements yet.
I have a question, what current should I expect across the 3.3 ohm resistor? I'm only seeing 65ma,
Question two, the 2k trimmer, how to set it ? Equal gain? Or balance the dc before coupling caps?
Ps tested it with 60 volt
I powered it up today and everything seems to work okay, relays are switching and I see ac when touching inputs, no measurements yet.
I have a question, what current should I expect across the 3.3 ohm resistor? I'm only seeing 65ma,
Question two, the 2k trimmer, how to set it ? Equal gain? Or balance the dc before coupling caps?
Ps tested it with 60 volt
Hi everyone!
I have som issues with my Clone Aleph P1.7, I have just started the hole thing up, but almost no noice, very very weak!
I am suspect that the problem are something on the PCB (from KK-PCB as I think several of you have knowledge about!?).
I have checked the resistor value, and they are correct, but still, my measurement reading 0V at the resistor as should have 0,65V over the resistor, and also the measure point after T2 and T9, both channel, are 0V measured to ground. Both channel are measured exactly the same... And same low volume level at both channel.
The input read 61.5V both channel. I have separeted power supply, also KK-PCB.
I have Dantimax Input selector and volume control, they are working fine when I bypass the P1.7 PCB.
Therefor I'm pretty sure that it is something wrong with the IRF610/9610 or/either ZTX450/550!? I have already change on one channel without any progress.
Thats I dont counted on?
I have connected the P1.7 KK-PCB according to the instructions.
Any ideas anyone?
Maybe further measure points I chould check?
I'm grateful for any ideas!
Best Regards, Mikael
I have som issues with my Clone Aleph P1.7, I have just started the hole thing up, but almost no noice, very very weak!
I am suspect that the problem are something on the PCB (from KK-PCB as I think several of you have knowledge about!?).
I have checked the resistor value, and they are correct, but still, my measurement reading 0V at the resistor as should have 0,65V over the resistor, and also the measure point after T2 and T9, both channel, are 0V measured to ground. Both channel are measured exactly the same... And same low volume level at both channel.
The input read 61.5V both channel. I have separeted power supply, also KK-PCB.
I have Dantimax Input selector and volume control, they are working fine when I bypass the P1.7 PCB.
Therefor I'm pretty sure that it is something wrong with the IRF610/9610 or/either ZTX450/550!? I have already change on one channel without any progress.
Thats I dont counted on?
I have connected the P1.7 KK-PCB according to the instructions.
Any ideas anyone?
Maybe further measure points I chould check?
I'm grateful for any ideas!
Best Regards, Mikael
Hi again! Sorry, no pics today after all, I got home to late from work, but I took my time and checked that all IRF, ZTX and diod's are correct mounted.
I have build a couple of working Aleph 1.2 and a Whammy so I'm not complete beginner, but I'm stuck here.
I'll try to fix better pics, but can take a few days.
At mean time, no further measure point I'll should check?
I have build a couple of working Aleph 1.2 and a Whammy so I'm not complete beginner, but I'm stuck here.
I'll try to fix better pics, but can take a few days.
At mean time, no further measure point I'll should check?
can you post better resolution schematic?
are all ZTX transistors in proper place, and oriented properly?
it'll be best if you have any of these free (out of pcb), to check pinout with actual measurement - if you have chinese multipractic testing gizmo ....... easiest with that
are all ZTX transistors in proper place, and oriented properly?
it'll be best if you have any of these free (out of pcb), to check pinout with actual measurement - if you have chinese multipractic testing gizmo ....... easiest with that
Thanks for trying to help me guys!
Pars, I've bypassed the attuenator etc, but no sounds att all from P1.7 (sounds at very low volume)
I have also tried the attuenator with bypassed the P1.7 and then it works fine.
Zen, I'm sure the ZTX are pinned the right way and also turned in proper place and orientation. I've rechecked this several times, so I'm little lost.
As I mention before, this is not my first build, and of cours it could be wrong sometimes, and I'm are not a electronic engineer
But then i usually sorted it out. This time I got really stuck. If it only was one channel who was not functional, it would be a lot easier.
I will check the ZTX so they are ok. (Bought them from Mouser, but ZTX550 are not avaliable any more, I noticed).
I will be back, but it can take some time, I have very much to do at work a couple of weeks ahead.
Pars, I've bypassed the attuenator etc, but no sounds att all from P1.7 (sounds at very low volume)
I have also tried the attuenator with bypassed the P1.7 and then it works fine.
Zen, I'm sure the ZTX are pinned the right way and also turned in proper place and orientation. I've rechecked this several times, so I'm little lost.
As I mention before, this is not my first build, and of cours it could be wrong sometimes, and I'm are not a electronic engineer
But then i usually sorted it out. This time I got really stuck. If it only was one channel who was not functional, it would be a lot easier.
I will check the ZTX so they are ok. (Bought them from Mouser, but ZTX550 are not avaliable any more, I noticed).
I will be back, but it can take some time, I have very much to do at work a couple of weeks ahead.
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