Pumpkin Preamp - Perfect for F4

Manu · 2007-06-28 7:15 am

Zen Mod said:
transsexuals,please stay on topic ,or I'll add you all to my "buddies list"

Yes I am a transexual french monkey-idiot, speaking bad english and using bad tires. And I love Choky's public humiliation.
What is wrong with me?

:devilr:

Zen Mod · 2007-06-28 9:26 am

steenoe said:
................
I assume the boardsize stays the same after the changes?

Steen

output caps on pcb or not?

Zen Mod · 2007-06-28 9:28 am

Manu said:
.............
What is wrong with me?

too much reading;

books no good for health

jameshillj · 2007-06-28 10:19 am

The Pumpkin - sister of B'fish j

Hi Alek,
I would suggest to leave the o/p caps off the pcb - many of them are big and just take up blank pcb space - bipasses can easily be fitted later if desired/required.
I would also suggest the common practice of adding a resistor to parallel the WR2 to reduce the 16 mA current through it or perhaps a "slave" transistor for the job, etc ....
.... and perhaps a small cap across those "green zeners"!

regards ... jh

steenoe · 2007-06-28 10:32 am

Zen Mod said:
output caps on pcb or not?

I think that the layout posted earlier on page 1 is a good one. Its flexible enough to be used for "smallish" filmcaps or BG nonpolar's. If one wants to use big outputcaps, they can easily be wired offboard using the connectionpoints on the board.

Zen Mod · 2007-06-28 10:57 am

Re: The Pumpkin - sister of B'fish j

jameshillj said:
Hi Alek,
............

regards ... jh

steenoe said:
I think t..........

tnx boyz.

clever thinking......

twitchie · 2007-06-28 3:34 pm

Zen Mod said:
transsexuals,please stay on topic ,or I'll add you all to my "buddies list"

members of off topic mob will have substantial discount when I start to make fortune with this combo

combo will be :

two Pumpkin main pcbs
two shunt reg pcbs (both + and - on one pcb)

two pairs of matched J309 or J310
two matched pairs of BC546 (even if that isn't needed)
pair of unmatched J309 or J310 (for led CCS)

and - in case that someone will be interested-
matched pairs of IRFs ......

edit - I didn't heard it yet ;(

tomorrow,if I find enough time.........

Can I join the OT mob? I don't have a green button and I'm not a transsexual yet, but I do like BBQs and skinny legs :cannotbe:

At the risk of exposing myself as a stoopid newb, is this a power supply? I think sister's are great (especially other people's sisters), and I have a FISH under construction, so will I need a Pumpkin?

mpmarino · 2007-06-28 5:08 pm

Why is it that I like grapes, but I don't like anything that's got grape flavor?

Manu · 2007-06-28 6:11 pm

mpmarino said:
Why is it that I like grapes, but I don't like anything that's got grape flavor?

There are generally 3 reasons for this :
OT
Transsexuel
Bad english
and a delightfull faible for green leds

You see, that is totally normal. Hope it helps.

Manuelle

:clown:

sklimek · 2007-06-28 8:05 pm

mpmarino said:
Why is it that I like grapes, but I don't like anything that's got grape flavor?

Why is it your green lathe avatar is becoming fuzzier and fuzzier every day?? Is it because I'm getting older, don't like green or I'm a transexual and it is just too manly for me???

mpmarino · 2007-06-28 8:29 pm

Manu · 2007-06-28 8:30 pm

Yes what?
We are friends, don't be shy.

mpmarino · 2007-06-28 8:32 pm

I was simply answering the following:

sklimek said:
Why is it your green lathe avatar is becoming fuzzier and fuzzier every day?? Is it because I'm getting older, don't like green or I'm a transexual and it is just too manly for me???

...no secrets

Edit: At the risk of paying too much for them 3 legged fuses - Choky, ya done yet?

Zen Mod · 2007-06-28 9:15 pm

twitchie ;
yes,yes and ....later

Pumpkin mono sound test;

I create the monster. :bigeyes:

Manu · 2007-06-28 9:38 pm

Relax guys, Zen Mod is working for us.
I can see the sweat drops on his forehead.
Until he scream It's alive!, It's alive!, we have some time for nice OT.

mpmarino · 2007-06-28 9:43 pm

will it drive a F4?

:devilr:

Zen Mod · 2007-06-28 10:06 pm

mpmarino said:
will it drive a F4?

ya drekin' me?

in previous iteration (without leds,with chip references) I measured 70Vpp output ,through 600:600 xformers ( so that was balanced output)..

will it drive F4?

it will drive F40 ,if needed :devilr:

edit- it will drive your dreky Altec squeeks directly .............. :Popworm:

Zen Mod · 2007-06-28 10:10 pm

Zen Mod said:
twitchie ;
yes,yes and ....later

Pumpkin mono sound test;

I create the monster.

Manu said:
Relax guys, Zen Mod is working for us.
I can see the sweat drops on his forehead.
Until he scream It's alive!, It's alive!, we have some time for nice OT.