In the mean time completetion is almost at 100%
/Kari
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
/Kari
Kari nice work there.
I see you used Cascode and everything.
Die you use the parts listed in Metalmans schematic or the ones in yours?
I am a little puzzled with choosing the 5W resistors and the Voltage for the power supply.
Metalman uses 820 Ohm, -20V / 70V and you use 750 Ohm ( 2 x 1500 parallel) -9V / 60V.
What is better?
I see you used Cascode and everything.
Die you use the parts listed in Metalmans schematic or the ones in yours?
I am a little puzzled with choosing the 5W resistors and the Voltage for the power supply.
Metalman uses 820 Ohm, -20V / 70V and you use 750 Ohm ( 2 x 1500 parallel) -9V / 60V.
What is better?
If i remeber correctly Metalman had "optimized" for a ~32V across the load resistors. I = U/R, 70/820 = 85mA and for mine 60/750 = 80mA. In reality the power supply is outputting a little more than 60V, when i tested my power supply i got 64V out, 64/750 = 85mA which is the same as Metalman is having. As for the CCS you can use higher voltages, but you need to keep an eye on 221ohm resistor which defines the currentflow trough the zener, so you need to either have a higher W on the zener or increase the resistors value to a proper value. You could also change the 27ohm resistor to a ex. 50ohm pot and then you would have a adjustable bias.
/Kari
/Kari
Hello Kari, I see you got your V-03 running, I picked mine up from the post office this morning, Johnny packed it with the second shipment of transformers. The V-03 was smashed to bits, completely destroyed from 50 pounds of transformers rolling around on it.
Needless to say I am less than impressed by this development.
Still waiting for my boards
Regards
Anthony
Needless to say I am less than impressed by this development.
Still waiting for my boards
Regards
Anthony
Variac said:50 lbs!!! That means Anthony has our transformers!!!!!
Well yes, I have 55 of the 69 ordered so far.
Anthony
schematic
At last!
You are not showing a volume resistor, would it be after the output 100K?
Like here:
http://www.diyaudio.com/forums/attachment.php?s=&postid=559778&stamp=1106626794
Just to confirm, the diode correction that Kari mentioned- does it require or not require a jumper?
At last!
You are not showing a volume resistor, would it be after the output 100K?
Like here:
http://www.diyaudio.com/forums/attachment.php?s=&postid=559778&stamp=1106626794
Just to confirm, the diode correction that Kari mentioned- does it require or not require a jumper?
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Amplifiers
- Pass Labs
- Heatsinks for Bosoz?