aha .........
same drek
bypass with 100n-1uF MKC and enjoy**
**start spending energy to find more musak
same drek
bypass with 100n-1uF MKC and enjoy**
**start spending energy to find more musak
Hello
Just happened to take a quick look at this thread. And noticed that the FET's name on the negative side in the shem above is wrong. Should be IRFP 9240 I think. But of course everyone already have noticed this ?!
Regards AB
Just happened to take a quick look at this thread. And noticed that the FET's name on the negative side in the shem above is wrong. Should be IRFP 9240 I think. But of course everyone already have noticed this ?!
Regards AB
Hello guys,
I cant fit my soft start circuit in the case! So the other options are thermistors CL-60 and similar. I want to run 5A on one channel is this ok whit this devices? They are rated 5A this is no problem on primaries but what the star ground connection???
Thanks...
I cant fit my soft start circuit in the case! So the other options are thermistors CL-60 and similar. I want to run 5A on one channel is this ok whit this devices? They are rated 5A this is no problem on primaries but what the star ground connection???
Thanks...
clarify
where to run 5A ?
from mains ?
that means 600W of dissipation , at least 1KW5 xformer etc. ........ so I believe that's just misunderstanding
where to run 5A ?
from mains ?
that means 600W of dissipation , at least 1KW5 xformer etc. ........ so I believe that's just misunderstanding
Ah....Not from mains!!! But from star ground how much current is flowing through this thermistor? I know that from mains there will be less then 1A current.
When does current pass through the Disconnecting Network?
I'll save you the research.
When there is catastrophic failure in the Mains circuit that links Mains Power to the secondary side.
Fault Current flows to Protective Earth until the Mains fuse ruptures and the arc extinguishes.
This Fault Current can approach kilo-Amps !!!!!!!!
That is why the fuse blow quickly and needs to blow quickly, so that you or any other does not get time to touch the LIVE Chassis before the fuse has blown.
I'll save you the research.
When there is catastrophic failure in the Mains circuit that links Mains Power to the secondary side.
Fault Current flows to Protective Earth until the Mains fuse ruptures and the arc extinguishes.
This Fault Current can approach kilo-Amps !!!!!!!!
That is why the fuse blow quickly and needs to blow quickly, so that you or any other does not get time to touch the LIVE Chassis before the fuse has blown.
Disconnecting Network
The Disconnecting Network (DN) between the Main Audio Ground and the Protected Chassis, can be a direct wire connection, or a Network of components designed to survive the passage of Fault Current until AFTER the mains fuse has blown.
I have tested a DN that works.
I have not seen any reports of any other Members' DN that have been tested.
The Disconnecting Network (DN) between the Main Audio Ground and the Protected Chassis, can be a direct wire connection, or a Network of components designed to survive the passage of Fault Current until AFTER the mains fuse has blown.
I have tested a DN that works.
I have not seen any reports of any other Members' DN that have been tested.
Understand that current takes the shortest way to pass in case of failure and
this will be the protective earth path.
Ok. I think i get it...🙂 I will use the thermistors. Thanks.
do not worry - there is no current through that NTC
it will flow only in case of xformer malfunction , where sole important thing is that NTC is capable of more current than mains fuse ..........
in layman terms - if there is current between primary winding and case , NTC will conduct it
I have not seen any Member report the result of testing the Power Thermistor version of the DN.
Do you plan to test it for all the other Members?
Or just adopt and hope?
If Nelson Pass designed it. I hope that this will work, or do you have a better idea,
as I cant use soft start circuit! Cant find a place to put it in there, only if I raise the toroids...🙂
as I cant use soft start circuit! Cant find a place to put it in there, only if I raise the toroids...🙂
I managed to put the soft start inside the case. 🙂 Powered up and working great!
I am running the FE biasing but want to know in which direction should I turn pot P1 on BIAS board for minimal bias current for the output stage?
I am running the FE biasing but want to know in which direction should I turn pot P1 on BIAS board for minimal bias current for the output stage?
Some thoughts about the BA-3 FE biasing. Its very hard to null out the DC offset.
I just want to know if this is normal as I get different DC offset when INPUT shorted and
when not. First I tried whit input shorted to ground and could adjust in the range of around 10mV after
that I tested the offset whit input open and the DC offset was 1V....Whats the problem here?
I just want to know if this is normal as I get different DC offset when INPUT shorted and
when not. First I tried whit input shorted to ground and could adjust in the range of around 10mV after
that I tested the offset whit input open and the DC offset was 1V....Whats the problem here?