Mr Shunta Cause,
it may be wiser not to inquire what sheep routine them Kiwis were doing before they discovered amp boards.
it may be wiser not to inquire what sheep routine them Kiwis were doing before they discovered amp boards.
Zen Mod said:
last series ofboards is shipped rolled in sheep wool ..........
Washed, hopefully......😉 😀 😉
mpmarino said:
no, cheapskate ......junkyard molester ......
ya don't need to buy bigger ones
😉
Ya guys are way too slow, and sleeping too much😀 Half your post's are an attempt to try and stay awake😀 😀 😀
Me😎
(Did I finish the Pumpkin??. I wont tell, untill someone else has
)
Me😎
(Did I finish the Pumpkin??. I wont tell, untill someone else has
)
steenoe said:.................
Me😎
(Did I finish the Pumpkin??. I wont tell, untill someone else has
would you tell me?
I GOT MY BOARDSS!!!!
Today in the mail, a little tiny package but well wrapped
With newspaper that is quite amusing to try to read!
Those boards are ugly for sure 😉
I still am amused that the power supply is more complicated than the preamp circuit. Of course truly, they are all part of the pre.
I will start making my list- not for Santa but for Mouser and Digi-Key
That's a lot of resistors, but I'm sure glad the Choky includes the hard to get stuff - Thank you Choky!!
This Pumpkin/F4 combo is going to be hard to beat!
Today in the mail, a little tiny package but well wrapped
With newspaper that is quite amusing to try to read!
Those boards are ugly for sure 😉
I still am amused that the power supply is more complicated than the preamp circuit. Of course truly, they are all part of the pre.
I will start making my list- not for Santa but for Mouser and Digi-Key
That's a lot of resistors, but I'm sure glad the Choky includes the hard to get stuff - Thank you Choky!!
This Pumpkin/F4 combo is going to be hard to beat!
Variac said:I GOT MY BOARDSS!!!!
Today in the mail, a little tiny package but well wrapped
With newspaper that is quite amusing to try to read!
Those boards are ugly for sure 😉
I still am amused that the power supply is more complicated than the preamp circuit. Of course truly, they are all part of the pre.
I will start making my list- not for Santa but for Mouser and Digi-Key
That's a lot of resistors, but I'm sure glad the Choky includes the hard to get stuff - Thank you Choky!!
This Pumpkin/F4 combo is going to be hard to beat!
Algar_emi,
I took your nice spreadsheet and started building my own list of orders, in doing so I noticed that you have listed R20 33R2, while the schematic lists it as 27K. Perhaps this is a typo or did I miss something among all the drekky OT stuff going on 😀 .
Regards,
Dinesh
Edit: Oh, wait, I also notice R24 & R25 different. Are you trying to increase the bias current?
I took your nice spreadsheet and started building my own list of orders, in doing so I noticed that you have listed R20 33R2, while the schematic lists it as 27K. Perhaps this is a typo or did I miss something among all the drekky OT stuff going on 😀 .
Regards,
Dinesh
Edit: Oh, wait, I also notice R24 & R25 different. Are you trying to increase the bias current?
dviswa said:
dviswa - just look in Pumpkin & Shunty Cook Book I sent you ;
there you'll find anything you need to know about values .
Good someone is checking my work 😉. Thanks dviswa for the comment. Zen Mod is right, his cookbook lists the correct value. I will post a corrected spreadsheet shortly.
Shunt current
Zen Mod,
I'm trying to understand how shunt regulators operate a little better. I understand the concepts of the shunt regulator just not the design considerations.
How much shunt current is there when the Shunty is loaded with a channel of the Pumpkin.? I tried to figure this out by the schematic, but couldn't come to a conclusion. I see that the drain resistance voltage across R12 is about 1.5 volts supplied by the lower CCS, which should be enough to turn on the shunt transistor. I remember reading somewhere that the shunt should be some percentage (20 to 25%) of the total constant current source output.
Could it be that what current isn't used by the load gets forced through the shunt??? This brings up the question, what is the maximum current load for the Shunty?.
The books I have don't get very specific about discrete shunt regulators.
BDP
Zen Mod,
I'm trying to understand how shunt regulators operate a little better. I understand the concepts of the shunt regulator just not the design considerations.
How much shunt current is there when the Shunty is loaded with a channel of the Pumpkin.? I tried to figure this out by the schematic, but couldn't come to a conclusion. I see that the drain resistance voltage across R12 is about 1.5 volts supplied by the lower CCS, which should be enough to turn on the shunt transistor. I remember reading somewhere that the shunt should be some percentage (20 to 25%) of the total constant current source output.
Could it be that what current isn't used by the load gets forced through the shunt??? This brings up the question, what is the maximum current load for the Shunty?.
The books I have don't get very specific about discrete shunt regulators.
BDP
Re: Shunt current
Awe, come on.... the Shunty doesn't need no stinkin' shunt! It's got about a thousand caps. This is tough on the junkyard BTW 🙂
Good question BDP - I hope you hear an answer. I wondered the same but kept quiet for fear of an early hanging 😉
BDP said:Zen Mod,
I'm trying to understand how shunt regulators operate a little better. I understand the concepts of the shunt regulator just not the design considerations.
How much shunt current is there when the Shunty is loaded with a channel of the Pumpkin.? I tried to figure this out by the schematic, but couldn't come to a conclusion. I see that the drain resistance voltage across R12 is about 1.5 volts supplied by the lower CCS, which should be enough to turn on the shunt transistor. I remember reading somewhere that the shunt should be some percentage (20 to 25%) of the total constant current source output.
Could it be that what current isn't used by the load gets forced through the shunt??? This brings up the question, what is the maximum current load for the Shunty?.
The books I have don't get very specific about discrete shunt regulators.
BDP
Awe, come on.... the Shunty doesn't need no stinkin' shunt! It's got about a thousand caps. This is tough on the junkyard BTW 🙂
Good question BDP - I hope you hear an answer. I wondered the same but kept quiet for fear of an early hanging 😉