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The Pumpkin preamp package(s) for sale

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Zen Mod

Zen Mod

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luvdunhill said:
erhm, I'm still confused on this coupling thingy... C4,C5 can be 4.7uF?
Click to expand...

certainly - depending on what is input impedance of next stage...... you can go as low as 1uF or even smaller

old one : F= 1/ (2 x Pi x R x C) , where R is Zin of next stage

luvdunhill said:

Oh well, after I make my millions in MKP1837, I want a Pumpkin. Will there be a Christmas sale?
Click to expand...

ya asked .......... :clown:

ya know - I'm pretty small Santa ..... :rofl:

but I can put outputs and few more IRFs in your envelope .......... without counting them in price
 
luvdunhill

luvdunhill

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Joined 2006
Zen Mod said:


certainly - depending on what is input impedance of next stage...... you can go as low as 1uF or even smaller

old one : F= 1/ (2 x Pi x R x C) , where R is Zin of next stage



ya asked .......... :clown:

ya know - I'm pretty small Santa ..... :rofl:

but I can put outputs and few more IRFs in your envelope .......... without counting them in price
Click to expand...

tempting... if I'm not stuck with so many MKP1837 that I have to feed them to the children I'll do it!

I wonder if algar_emi has found any nice heatsinks :)
 
Zen Mod

Zen Mod

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luvdunhill said:


3,000 little plastic parts showing up at my house... where have you been? probably too busy hitting refresh on the :Pumpkin: pages :D

You should have seen it if you were stalking Jacco's posts anyways :)
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well, ya naughty boy ............. :rofl:

in any case - whenever you finish that ROE thingie , ( with few gray hairs more and slightly less hours spent in chasing them , packing and sending ) ...... just remind me ,and your special discount package (from few posts "above") can be sent to ya ......

matched zombi outs + rest of zombies for P & S
 
Algar_emi

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I'm back from NY and look what was in my mial box :D
Thanks Zen Mod.
 

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H

hershann

Member
Joined 2007
Algar_emi said:
Parts List update: Added parts from Newark. Now you can get almost all the parts from Digikey and Newark.
Changed Shunty 4R7 resistors for a better type.
Changed C3-C10 cap. type for in-stock part.
Corrected some typo.
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Just wondering why the BOM listed above is differing from the Pumpkin schematic and cookbook for the Pumpkin R20 R23 R24 R25?

her shann
 
Zen Mod

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Algar_emi

Algar_emi

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I started a new thread with my Pumpkin construction diary at: http://www.diyaudio.com/forums/showthread.php?s=&postid=1407243#post1407243

I didn't change the values of R20 R23 R24 R25 in the BOM. I just selected the closest value that matched the standard 1% Metal Film value table.

R20 = 27K = 27.4K (27.0K was not available from Yageo)
R23 = 3.9K = 3.92K (very close if you ask me) ;)
R24 = 270R = 274R ( '' )
R25 = 4.3K = 4.32K ( '' )

Hope it clarifies things...

;)
 
H

hershann

Member
Joined 2007
Algar_emi said:
I started a new thread with my Pumpkin construction diary at: http://www.diyaudio.com/forums/showthread.php?s=&postid=1407243#post1407243

I didn't change the values of R20 R23 R24 R25 in the BOM. I just selected the closest value that matched the standard 1% Metal Film value table.

R20 = 27K = 27.4K (27.0K was not available from Yageo)
R23 = 3.9K = 3.92K (very close if you ask me) ;)
R24 = 270R = 274R ( '' )
R25 = 4.3K = 4.32K ( '' )

Hope it clarifies things...

;)
Click to expand...


Just want to let you know that the BOM ver 2.2.zip file above has completely different values for those resistors that was mentioned.

thanks

her shann
 
W

wirewiggler

Member
Joined 2005
thanks ZM,
Boards arrived, thought I may have missed them while in Canada for week but they held on to them. Now to go thrashing about Steve's warehouse at Apex for heat sinks and transformers. I have some 610s and 9610s are they a direct drop in when mixed with the 510s and 9510s you sent?
 
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