Pumpkin preamp - ordered by Steen , official making thread

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#1,583
I started to look through the 64 pages of this thread. Has anybody noticed the noise to signal ratio is pretty high?
Anyway, maybe somebody can answer a simple question: is anyone selling PCBs for this preamp? I am most interested in the headphone version that was posted in another thread somewhere, but it may be similar enough I could use a Pumpkin PCB. I am thinking of battery power, +/- 12V.

Thanks
 
#1,584
paulb said:
I started to look through the 64 pages of this thread. Has anybody noticed the noise to signal ratio is pretty high?
............
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well - if you look who are most frequent posters in this thread , and look for other threads where are the same most frequent posters , you'll find that these threads have same S/N ratio ............

if you think on S/N ratio of thread , not preamp's ........

(it's nice to have fun and pleasure looking at schematics , but there is some life left out of schematics world)

:devilr:
 
#1,586
jacco vermeulen said:
Mmm, does post 9 of the 1st page not link to the PCB selling thread ?

I can see that dviswa may have a noise issue if he's heading for unity gain, but just where did you read the SNR number ?
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Jacco,

S/N of the thread aside, which we all know is a ZM thread, doomed to OT 😀
Please explain what you meant regarding SNR vis-a-vis unity gain.

Thanks,
Dinesh
 
#1,587
dviswa said:


Jacco,

S/N of the thread aside, which we all know is a ZM thread, doomed to OT 😀
Please explain what you meant regarding SNR vis-a-vis unity gain.

Thanks,
Dinesh
Click to expand...


Jaccovitty is just playin' , as always ........

you can use that drek in unity gain ....... just rearrange (J)accordingly values of those phase lag caps in feedback net ........ observing what CRO can show you ......
 
#1,593
I wan't to report a very very amazing case of telepathy between Crunchville and Vienna
:wiz:

mpmarino said:
...
Shunty is beautifully ugly - she will find a home in a phono pre or a small amp - or both, and surely will do a 'terrible' job at it 😉. ...
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As marino posted these lines, at the very same time, I was asking our Master Zen :

Originally posted elsewhere by Manu
... while waiting for some caps for pumpkin, I decided to finish my ONO, I began 5 years ago... May be they will Kuscheln in same case, who knows...
BTW : Would be Shunty a good reg. for ONO ?
Click to expand...

He replayed almost immediately :

Originally posted elsewhere by ZenMod
... it's completelly possible to feed it with Shunty , but be prepared to double dissipation - read - double heatsinking.......
maybe smartest thing is to relocate all mosfets and darlingtons to external heatsink ...
Click to expand...

Isn't great?

Is it unity gain?

:clown:
Manu
 
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