Gurpreet is there a reason for the heatsinks to be mounted differently? in the photo the ones on the left side of the board the heatsinks are in contact with the exposed metal tab on the back of the transistor but on the right they are mounted on the case side which will not properly conduct heat.
i would also make all the sinks the same size so that thermal dissipation for each device is closer to the same(can't be equal if the size is different?)
if your bias is drifting it could be thermal.
i would also make all the sinks the same size so that thermal dissipation for each device is closer to the same(can't be equal if the size is different?)
if your bias is drifting it could be thermal.
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Gurpreet is there a reason for the heatsinks to be mounted differently? in the photo the ones on the left side of the board the heatsinks are in contact with the exposed metal tab on the back of the transistor but on the right they are mounted on the case side which will not properly conduct heat.
i would also make all the sinks the same size so that thermal dissipation for each device is closer to the same(can't be equal if the size is different?)
if your bias is drifting it could be thermal.
Hello my friend, thanks for help on thermal issue. Last pic click just before test, all the measure volts, bias, and DC offset(10-20mv) with proper heat sinks. No connectivity in between both sinks, its just warm. I have just two issues
1, bias stable with open input and short input with GND, but after some playing music 🎶 with 75%volume 📣 bias is shuffling and goes to 100 to 120mv.
2 , DC OFFSET not stable with short input and without short input.
Regards
Gurpreet
Attachments
Hello my friend, thanks for help on thermal issue. Last pic click just before test, all the measure volts, bias, and DC offset(10-20mv) with proper heat sinks. No connectivity in between both sinks, its just warm. I have just two issues
1, bias stable with open input and short input with GND, but after some playing music 🎶 with 75%volume 📣 bias is shuffling and goes to 100 to 120mv.
2 , DC OFFSET not stable with short input and without short input.
Regards
Gurpreet
Add 100pF from base to colector on TIP142 and TIP147...
OMG, I make big mistake. I read Mr.Mile's Suggestion through email in hurry. Next I understand every suggestion then after do something, thanks Mr. Still4given you me and sr board.
Regards
Gurpreet
You can't run the amplifier in full power having the bulb connected.
Pulb test is usefull with no signal only!
it's a series current limiter,no? (the dim bulb tester) what wattage of lamp are you using?
100w bulb
Add 100pF from base to colector on TIP142 and TIP147...
I think he meant to add a 100p to each from base to collector.
Now its ok?
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Hello I am totally upset with me sr200 .I attach PSU grounds with input ground .When I do low volume then zzzzzzz sound coming. Sir mile plz help me .I know u r busy too much .But plz
Hi Sunny, here you are, Apex over current detected for PSU 7
Regars
Hi Sunny, here you are, Apex over current detected for PSU 7
Regars
Sorry
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Sir I need PCB layout
Sunny, I think u have pro adopter PCB layout, now u just compare with schematic which is posted by Kandimba.
By the way what ohm is Ur speakers 8ohm or 4ohm.
😊
Sunny, I think u have pro adopter PCB layout, now u just compare with schematic which is posted by Kandimba.
By the way what ohm is Ur speakers 8ohm or 4ohm.
😊
Sorry
Sorry 😅😅 actually last time I run my sr on 4ohm speakers now I use 8ohm speakers no hum on hiss-hiss. Thanks for noticing my attention on speaker impedance.
Can I use this pro adapter for sr200 with psu7
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