Pumpkin preamp - ordered by Steen , official making thread

Jump to Latest
#825
Sorry for bothering - I'll go back to the Pumpkin/Shunties...:xeye:
... in the meantime, yes - Steen - Happy 32-nd (HEX) birthday!

Just arrived a monster that will feed the Shunties :clown:. Custom winded EI transformer- ordered for 2 X 42V RMS. Still didn't have a time to check a voltage on it.
 
#829
Variac said:
I don't think that the SF pre had any Shunties at all. A much more conventional power supply instead,. It did have only one transformer though..
Click to expand...
You better know 😉 and You're right. I was thinking about similarities with a transformer. Btw, here are the measurements just taken "in the air" - with no load. Seems to be very good...
 
#832
Well, I thought it sounded great w/o shunties, (much credit to the F4 of course) So with Shunties seems almost scary😱 :hot:

I am rebuilding my F4 as it was pretty cobbed together for the show, and will post photos in the F4 thread when it is done, then on to the Pumkie Shuntkin
 
#836
spavleski said:
Yes - at the moment monster will feed both Shunties... similar to one presented in SF, isn't it?
Click to expand...


You will be quite fine with that transformer - the more VA the merrier! Yes it is quite similar to the one I got. I didn't have Shunty ready for the BA, but I used two power supplies that were originally from XBoSOZ - non regulated power supplies. I am working on completing the Shunty which is quite the task. :devilr: due to the wild designer.

Good luck with your project
AR2
 
#838
Pumpkin Volume Control

Hi. What would be the best volume control for the pumpkin?

It is a balanced input preamp, so a few question:

If use as single ended, do we just ground one input and input the signal into the remaining input, any side is better than the other for that?

-I guest we need a balanced volume control. Is this balanced 5K serie attenuator fro K&K audio a good choice: http://www.kandkaudio.com/linestage.html

any other suggestion?

Thanks in advance.
 
#839
Re: Pumpkin Volume Control

Algar_emi said:
Hi. What would be the best volume control for the pumpkin?

It is a balanced input preamp, so a few question:

If use as single ended, do we just ground one input and input the signal into the remaining input, any side is better than the other for that?

-I guest we need a balanced volume control. Is this balanced 5K serie attenuator fro K&K audio a good choice: http://www.kandkaudio.com/linestage.html

any other suggestion?

Thanks in advance.
Click to expand...


I think that I covered that in Cook Book's addendum ......

anyway - either using input or output unbalanced - most convenient is to ground minus leg , and use positive leg as hot

use whatever attenuator or pot ( up to 50K) , but have that on mind - shunt attenuator ( as shown on that link ) have variable output/input impedance

for Pumpie that isn't problem,but for some sources can be .

edit :

if you choose pot ........ our friend at Dantimax (lookie lookie) have some interesting things
 
You must log in or register to reply here.
Top Bottom