Pumpkin preamp - ordered by Steen , official making thread

Zen Mod · 2007-11-18 7:13 am

Magura said:
Did you just call me a female dog?

Magura

probably naah .......... even if I thought that he is .........

:clown:

female dogs aren't so extreme in mood changing , as male dogs are ........

:devilr:

(call me female cat , if you wish :rofl:

)

carpenter · 2007-11-18 7:44 am

Zen Mod said:
(call me female cat , if you wish )

Come here, my little puss-'n-boots...... :devilr:

But I digress... which form of transport is my little preamp taking? US postal, UPS, Fed Ex?

lykkedk · 2007-11-18 7:53 am

Please stop all that O.T. guys... hehe

let's get back into battle ...

Anyway, this might be a dumb quistion, but i just got a thought about shortning -out, when not in use, is it ok to short -out to gnd ? or should it just be left 'open' ???

Please bare with me!

Jesper.

Zen Mod · 2007-11-18 7:59 am

lykkedk said:
Please stop all that O.T. guys... hehe let's get back into battle ...

Anyway, this might be a dumb quistion, but i just got a thought about shortning -out, when not in use, is it ok to short -out to gnd ? or should it just be left 'open' ???

Please bare with me!

Jesper.

short it

carpenter · 2007-11-18 8:02 am

lykkedk said:
Please bare with me!

Jesper.

Bare
From Wikipedia, the free encyclopedia

Bare means minimal or naked. Bare may also refer to:

Places:

Bare, Morecambe, a suburb of Morecambe, in Lancashire, England.
Bare (woreda), a district in Ethiopia
Bare (Serbia), a place in Serbia

Now, who's OT?

Zen Mod · 2007-11-18 8:05 am

carpenter said:
Come here, my little puss-'n-boots......

But I digress... which form of transport is my little preamp taking? US postal, UPS, Fed Ex?

prrrrrrrrrrrrrrrrrrrrrrrr

dunno - air mailed from my side......
lemme try track......... ( envelope No. rr120755476rs )

07.11.2007. leave Serbia border .......

because of recent Ragnarok , Serbia isn't in EU , so I can't track it further ....

naah ...... just chill ..... and prepare those F4 pcbs

AR2 · 2007-11-18 8:12 am

I am the new Shunty owner. What a board! They speak three languages (figuratively talking)
Now I am really Shantav. (Choky will know what I am talking) Cannot wait to put it together.
Thank you Choky!

carpenter · 2007-11-18 8:12 am

Zen Mod said:
prrrrrrrrrrrrrrrrrrrrrrrr

just chill ..... and prepare those F4 pcbs

Zen Mod · 2007-11-18 8:58 am

AR2 said:
I am the new Shunty owner. What a board! They speak three languages (figuratively talking)
Now I am really Shantav. (Choky will know what I am talking) Cannot wait to put it together.
Thank you Choky!

carpenter said:

woodie............

ya see- same day sent .... arrived in your neck of wood ..........

:clown:

lykkedk · 2007-11-18 8:59 am

short it

Thank's man... Actually i just tried it.

If i feed :Pumpkin:

with 2vac sine, then 30vac sine come's out unbalanced, with -out 'open'... with -out closed, it spitzz out 45vac sine... that's a big difference...

JUST don't understand why ??? but nevermind... it work's fine.
I make this unbal/bal selector, so that i got possibility to use with other amp's than my F4...

Jesper.

Zen Mod · 2007-11-18 12:22 pm

lykkedk said:
Thank's man... Actually i just tried it.

If i feed with 2vac sine, then 30vac sine come's out unbalanced, with -out 'open'... with -out closed, it spitzz out 45vac sine... that's a big difference...

JUST don't understand why ??? but nevermind... it work's fine.
I make this unbal/bal selector, so that i got possibility to use with other amp's than my F4...

Jesper.

it's easy to understand - you always need two points to establish any voltage difference ;
with one leg open , you have gnd somewhere, but not really where it need to be ;

when you ground one of outputs ( you know - you can choose which leg you'll ground :devilr:

) you have established both points , needed for current flow......

be careful - using :Pumpkin:

with F4 oriented gain setting - with other amps

carpenter · 2007-11-18 5:29 pm

Zen Mod said:
it's easy to understand - you always need two points to establish any voltage difference ;
with one leg open , you have gnd somewhere, but not really where it need to be ;

when you ground one of outputs ( you know - you can choose which leg you'll ground ) you have established both points , needed for current flow......

be careful - using with F4 oriented gain setting - with other amps

So, the pumpkin does single-ended out. I thought it might, but forgot where I read, or forgot to ask.

Just remember to ground one of the outputs. Check.

If this is supposed to be an inverting amp, do I gound the negative out?

Zen Mod · 2007-11-18 5:47 pm

carpenter said:
So, the pumpkin does single-ended out. I thought it might, but forgot where I read, or forgot to ask.

Just remember to ground one of the outputs. Check.

If this is supposed to be an inverting amp, do I gound the negative out?

where is the fun if I tell you everything?

:clown:

just imagine xformer instead of :Pumpkin:

; both prim and sec CT-ed .

:rofl:

lykkedk · 2007-11-18 6:11 pm

it's easy to understand - you always need two points to establish any voltage difference ;
with one leg open , you have gnd somewhere, but not really where it need to be ;

Woow... ofcause ZenMod... easy to understand, i also know that about floating gnd, but didn't just think of it in this case. I don't know why, but sometimes it's difficult to me to understand thing's in other perspectives than the one's i used to work with...

This is a very good explanation ZenMod, thank you for that.

Jesper.

Manu · 2007-11-18 6:27 pm

Sasha,
I wan't some of these hudgely hugly pcbs too.
Excitement not any more under control.
Pada li snijeg un srbiji like in Betsch?

:clown:

Monkey face

carpenter · 2007-11-18 6:30 pm

Zen Mod said:
just imagine xformer instead of ; both prim and sec CT-ed .

Yes, that's a great analogy.

But what trips me up is which secondary tap to use if I want inverting. We've got + and - inputs and probably only want a + out relative to ground. I think. So my mind tells me to ground the negative tap.

lykkedk · 2007-11-18 7:02 pm

ZenMod:

be careful - using with F4 oriented gain setting - with other amps

Hmmm... Actually i am having BIG problem driving my LeachAmp with :Pumpkin:

... I must say that i never tried it before i attached my inputselector... hmmm donno right if that's the problem ... will learn more next few day's i guess ... it's irritating but fun too

....

I attached my LeachAmp... and the inputselector/pumpkin is a GIANT disortion machine.... GREEEAT hummming reallly great!

I haven't yet tried the :Pumpkin:

with my dreky inputselector and my F4... btw.

Will tell, about problem in few day''s...

Carpenter:

But what trips me up is which secondary tap to use if I want inverting. We've got + and - inputs and probably only want a + out relative to ground. I think. So my mind tells me to ground the negative tap.

I am pretty sure, it dosent matter... but anyway i would choose to gnd the -out...

Jesper.

carpenter · 2007-11-18 7:39 pm

lykkedk said:
....i would choose to gnd the -out...

Jesper.

Thanks for that. Even though I haven't a solid idea as to why, it just seems to make intuitive sense to have a + out relative to ground.

Zen Mod · 2007-11-18 7:46 pm

Zen Mod said:
where is the fun if I tell you everything?

just imagine xformer instead of ; both prim and sec CT-ed .

carpenter said:
Yes, that's a great analogy.

But what trips me up is which secondary tap to use if I want inverting. We've got + and - inputs and probably only want a + out relative to ground. I think. So my mind tells me to ground the negative tap.

take literally what I wrote ;

if you want absolute phase in puritan way then ground + output and use - as main one .

Zen Mod · 2007-11-18 7:50 pm

Manu said:
Sasha,
I wan't some of these hudgely hugly pcbs too.
Excitement not any more under control.
Pada li snijeg un srbiji like in Betsch?

Monkey face

it stopped in late afternoon ......... hehe

pada li snijeg in Betsch like in Batsch ......... ?

seems tha now it started again, but slowly ..........

today I Skyped a little with my friend AR2 in SF ........ he told me that he didn't saw snow in 7 or 8 years ......

your package will be sent tomorrow.....

Pumpkin preamp - ordered by Steen , official making thread

Official Court Jester

Member

Member

Official Court Jester

Member

Official Court Jester

Master Burner

Member

Official Court Jester

Member

Official Court Jester

Member

Official Court Jester

Member

Member

Member

Member

Member

Official Court Jester

Official Court Jester