Pumpkin preamp - ordered by Steen , official making thread

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#748
HBarske said:
Papa's toy will be gone by next week :bawling: - some diy progress is urgently needed...
Not sure if those beer cans will make it into :Pumpkin:, but I'll give them a try.
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did you found enough material for translation (for our friends at Analog ) in last :Pumpkin: Cook Book ?

:clown:


regarding previous pic:
why don't you just tell that some thieves tooked that crummy amp from ya ...... ?

and - jensens will do , but - if you have some older Siemens of Rifa uglies, don't hesitate ............ Pumpie is made with old tech in mind 😉
 
#749
did you found enough material for translation (for our friends at Analog ) in last Cook Book ?
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Absolutely, thanks again. Will take some more days though, lots of work ATM.

why don't you just tell that some thieves tooked that crummy amp from ya ...... ?
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Possibly that would make it more complicated to get the next PL beauty for a review 🙄

Regarding 😛umpkin: capacitors: Enough cans to play around, including russian PIOs. We'll see...
 
#750
HBarske said:

.............Enough cans to play around, including russian PIOs. We'll see...
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most old drek you can see at Jogis Roehren..... - old Rifa,Siemens , ROE,Wima .............. PIO and Poly ...... are absolutely delightfull for modern electronic ; dunno what's catch - maybe fact that you can find real foil in them , not metalized dielectric.......

anyway - I like those old "Post" caps 😉
 
#752
Variac said:
Hey ZM,
Maybe you could mention the pages that have updates in the latest
Cookbook- you know, then we could save all those trees and not reprint he whole thing ..
😉
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yes Bwana .........

:rofl:

just one page added .......... AS LAST ONE

there it is (I mean text ) :

***********************************************
ADDITIONAL NOTES :




HEATSINKS :

Fischer
SK81-50 SA
SK75-50 OR

Austerlitz
KS100.3-50
KS32.1-50E


CONNECTION :


You can connect Pumpkin inputs and outputs in all combinations you can imagine ;
My advice can be – use balanced pot(s) for inputs (either one 4-deck , or two independent stereo pots) in any value you choose – from 5K to 50K , log off course .

Then use XLR chassis connectors for all inputs and outputs .

That’s certainly most convenient if you choose balanced input – balanced output configuration .

If you choose to use unbalanced either input or output (or both unbalanced) , again use XLR cable jack even for unbalanced ,and just tie ( solder) pins 1&3 inside that cable jack .

So – these combinations are possible :

- bal in : bal out
- unbal in : bal out
- unbal in : unbal out
- bal in : unbal out

In every “unbal” case – you must tie 1&3 pins in XLR ;

It’s also possible special situation – where you use bal out and unbal out in same time, but (naturally) WITHOUT tying 1&3 pins of output XLR (just because tying those pins you are just killing balanced out entirely) , where you as “unbal” out are using in fact just half of balanced signal ................... where HOT is from pin 2 (+ output) and gnd is from gnd , what else 😉 ; That’s useful for biamping purpose , where one power amp is balanced and other is not .......... and 6db difference between balanced and unbalanced is something that suits your needs .........

*************************************************


who will print entire drek , without looking what's in it?

:angel:
 
#753
I did look what's in it and discovered that it was very time consuming to look through each page for a single changed word or number or such!

I guess it was especially hard because there weren't any changes to find- except the last page!

I DO appreciate the notes though- they are about stuf I had asked about in part 🙂


I just got some huge Rifa's off ebay so I can also have the Big Bulky Cap look!😎
 
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