Hi!
Zen everybody have Pumpkin preamp, what about me BRA?
I'll be good this year!
Regards zeoN_Rider
Zen everybody have Pumpkin preamp, what about me BRA?
I'll be good this year!
Regards zeoN_Rider
For Shunty C17/a & C18/a - was listed as 10n ceramic cap. I have some extra 10n film caps lying around - is it alright to substitute with the film cap?
her shann
her shann
Manu said:spavleski :
Bravo!
nice to see that you're almost finish.
I envy you...
I couldn't work on Pumpkin last week because I got visit from Paris, and spent all the time playing tourist guide
But ... why did you use Kajmak instead of goop?
Hi Manu - You know that Kajmak is the best in the world 😉 ... as I said, I'll remove it
hershann said:
Better any cap across a rectifier diode than no cap, stuff like distortion figures and tolerance don't mean sheet for diode damping.
Cheapo cookybookie says better add some ceramics on the next orderlist, Z/X/NPo ceramics are superior to any film as rectifier bypass and cost mucho less.
(esoteric pric-picks an NPo/COG, 3.9pF-100nF)
hershann said:
I usually let them sit for the PSU connections. Its very convenient when you have to take it apart. For the signals its mucho better to solder the leads directly to the boards.
🙂
jacco vermeulen said:
Is it true for any kind od Rect.-Diode?
Shotky, Soft recovery, ultrafast etc...?
Manu
Je commande?
Very high efficiency speakers. . .
While waiting with eager anticipation for the Pumpkin/Shunty boards, I've been collecting parts out of my junk boxes, and figuring out what I need to order. However, I'm thinking that I may not need the truly manly voltage swing of the Pumpy/Shunty into the F4 with my 106db/w/m DIY Edgarhorns. . .
I've followed the threads on "how" to lower output, but what is stumping me is "how much" I ought to be considering -- I don't want to be running the volume control just cracked open. A pot can be touchy enough, and with stepped attenuators I've found that it is *always* one click to soft, the next click too loud. . . 😱
I currently run the Edgars with a Brenneman cathode follower tube integrated with a whopping 10 wpc, and usually never have the volume control more than 1/4 open.
Suggestions? 😎
It would be nice to have a volume control with very fine control down where I actually use it, and I don't care if it makes 6dB steps at full volume, 'cause it never gets close to that high!
Thanks for your time -- and thanks for the most interesting and entertaining DIY threads I've ever come across. 🙂
Steve Z
near Libby, Montana USA
While waiting with eager anticipation for the Pumpkin/Shunty boards, I've been collecting parts out of my junk boxes, and figuring out what I need to order. However, I'm thinking that I may not need the truly manly voltage swing of the Pumpy/Shunty into the F4 with my 106db/w/m DIY Edgarhorns. . .
I've followed the threads on "how" to lower output, but what is stumping me is "how much" I ought to be considering -- I don't want to be running the volume control just cracked open. A pot can be touchy enough, and with stepped attenuators I've found that it is *always* one click to soft, the next click too loud. . . 😱
I currently run the Edgars with a Brenneman cathode follower tube integrated with a whopping 10 wpc, and usually never have the volume control more than 1/4 open.
Suggestions? 😎
It would be nice to have a volume control with very fine control down where I actually use it, and I don't care if it makes 6dB steps at full volume, 'cause it never gets close to that high!
Thanks for your time -- and thanks for the most interesting and entertaining DIY threads I've ever come across. 🙂
Steve Z
near Libby, Montana USA
Re: Very high efficiency speakers. . .
did you downloaded Cook Book ?
http://czsr_bac.on.neobee.net/The Pumpkin & Shunty.pdf
just say -yey or ney , and I'll answer , or will not ........
edit :
it's really not important did you downloaded it ; what is important - did you read it ?
zettelsm said:While waiting with eager anticipation for the Pumpkin/Shunty boards, I've been collecting parts out of my junk boxes, and figuring out what I need to order. However, I'm thinking that I may not need the truly manly voltage swing of the Pumpy/Shunty into the F4 with my 106db/w/m DIY Edgarhorns. . .
I've followed the threads on "how" to lower output, but what is stumping me is "how much" I ought to be considering -- I don't want to be running the volume control just cracked open. A pot can be touchy enough, and with stepped attenuators I've found that it is *always* one click to soft, the next click too loud. . . 😱
I currently run the Edgars with a Brenneman cathode follower tube integrated with a whopping 10 wpc, and usually never have the volume control more than 1/4 open.
Suggestions? 😎
It would be nice to have a volume control with very fine control down where I actually use it, and I don't care if it makes 6dB steps at full volume, 'cause it never gets close to that high!
Thanks for your time -- and thanks for the most interesting and entertaining DIY threads I've ever come across. 🙂
Steve Z
near Libby, Montana USA
did you downloaded Cook Book ?
http://czsr_bac.on.neobee.net/The Pumpkin & Shunty.pdf
just say -yey or ney , and I'll answer , or will not ........
edit :
it's really not important did you downloaded it ; what is important - did you read it ?
wow the cookbook is fab, its written in 'chokyspeak' and my prediction is that it'll be the bestseller for 2008.....it might even get shortlisted for the Booker..
😀
😀
jacco vermeulen said:
I think that I need a copy of that edition!!
Here is my Bible 'till now: "Il Cucchiaio D'argento"
"The Silver spoon" Is by far the most sold Cook Book in Italy!!
Since 1950, when it was issued for the first time, it has been a firm stable at every wedding in Italy!!! Tell me about it😀 I simply love Italian cooking😎 Italian style cooking, rock's... Take that my fellow Italians....🙂
Oh and to keep on track, the Pumpkin simply sounds great!
🙂
jacco vermeulen said:
Any chance that you want to part with that book???
Ohhh, forget it I dont read Frenchy...He-he...
🙂
Cookbook/gain question
Yes, I did download and read the Cookbook, (and I thought it was a great thing for you to do). I believe I understand the "how to" part of lowering the gain/voltage swing of Pumpy. But maybe I missed something. I've had the flu for the last couple of days and haven't been in my right mind.
What I am not sure about is "how much" to lower the gain. Or perhaps I don't need to lower it at all. I don't mind using the lower part of the pot or stepped attenuator, so long as I have enough control over small adjustments without always hunting and being too loud or too soft.
I tried a a well-thought-of Chinese 2A3 integrated amp a while ago with my DIY Edgarhorns, and besides being unacceptably noisy, it was too loud at the third click of the stepped attenuator.
So maybe all I need to do is figure out the right range of potentiometer. I remember reading that a lower value is theoretically better for performance
Am I barking up the wrong tree? 😕
Feel free to heap ridicule on my head!
Steve Z
Libby, MT USA
Yes, I did download and read the Cookbook, (and I thought it was a great thing for you to do). I believe I understand the "how to" part of lowering the gain/voltage swing of Pumpy. But maybe I missed something. I've had the flu for the last couple of days and haven't been in my right mind.
What I am not sure about is "how much" to lower the gain. Or perhaps I don't need to lower it at all. I don't mind using the lower part of the pot or stepped attenuator, so long as I have enough control over small adjustments without always hunting and being too loud or too soft.
I tried a a well-thought-of Chinese 2A3 integrated amp a while ago with my DIY Edgarhorns, and besides being unacceptably noisy, it was too loud at the third click of the stepped attenuator.
So maybe all I need to do is figure out the right range of potentiometer. I remember reading that a lower value is theoretically better for performance
Am I barking up the wrong tree? 😕
Feel free to heap ridicule on my head!
Steve Z
Libby, MT USA
PS
Oh yeah, I will now go back and read through the Cookbook again and the selected posts I've saved. . .
Steve Z
Oh yeah, I will now go back and read through the Cookbook again and the selected posts I've saved. . .
Steve Z
Re: PS
Pumpie:
just use it in 5x gain mode ;
that means 10K in line with gates and 47K in feedback path ;
in case that you feel too small gain , just increase 47K
in any case - that drek is /will be yours , so you can do whatever you want ............. except neg gain ........... ( without meaning on phase )
zettelsm said:Yes, I did download and read the Cookbook, (and I thought it was a great thing for you to do). I believe I understand the "how to" part of lowering the gain/voltage swing of Pumpy. But maybe I missed something. I've had the flu for the last couple of days and haven't been in my right mind.
What I am not sure about is "how much" to lower the gain. Or perhaps I don't need to lower it at all. I don't mind using the lower part of the pot or stepped attenuator, so long as I have enough control over small adjustments without always hunting and being too loud or too soft.
I tried a a well-thought-of Chinese 2A3 integrated amp a while ago with my DIY Edgarhorns, and besides being unacceptably noisy, it was too loud at the third click of the stepped attenuator.
So maybe all I need to do is figure out the right range of potentiometer. I remember reading that a lower value is theoretically better for performance
Am I barking up the wrong tree? 😕
Feel free to heap ridicule on my head!
Steve Z
Libby, MT USA
zettelsm said:
Pumpie:
just use it in 5x gain mode ;
that means 10K in line with gates and 47K in feedback path ;
in case that you feel too small gain , just increase 47K
in any case - that drek is /will be yours , so you can do whatever you want ............. except neg gain ........... ( without meaning on phase )