luvdunhill said:erhm, I'm still confused on this coupling thingy... C4,C5 can be 4.7uF?
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?
ya asked ..........
ya know - I'm pretty small Santa .....
but I can put outputs and few more IRFs in your envelope .......... without counting them in price
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 ..........
ya know - I'm pretty small Santa .....
but I can put outputs and few more IRFs in your envelope .......... without counting them in price
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
luvdunhill said:
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
whazzat MKP1837 ?
sorry for my ignorance
Zen Mod said:
whazzat MKP1837 ?
sorry for my ignorance
3,000 little plastic parts showing up at my house... where have you been? probably too busy hitting refresh on the pages
You should have seen it if you were stalking Jacco's posts anyways
luvdunhill said:
3,000 little plastic parts showing up at my house... where have you been? probably too busy hitting refresh on the pages
You should have seen it if you were stalking Jacco's posts anyways
well, ya naughty boy .............
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
ZUM911 said:The Pumkin and Shunty and goodies arrived today.
Many thanks Zen Mod
cheers
rick
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.
posted HERE in building thread
mpmarino said:That's a Beeeaauuutiful capacitor rack you have there on the left.
gimmmmmmeee some of drek you smoke ...........
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.
Just wondering why the BOM listed above is differing from the Pumpkin schematic and cookbook for the Pumpkin R20 R23 R24 R25?
her shann
hershann said:
Just wondering why the BOM listed above is differing from the Pumpkin schematic and cookbook for the Pumpkin R20 R23 R24 R25?
her shann
I can tell that I didn't checked BOM Algar-emi made ;
so - on this question only he can answer ;
btw - Algar_emi - few additional notes :
http://www.diyaudio.com/forums/showthread.php?postid=1402167#post1402167
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...
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...
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...
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
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?
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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