looking for preamp project for Aleph 3

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Dukja

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Joined 2011
#1
After done the recapping of my recently acquired Pass Lab Aleph 3, I am looking forward to build a Pass Lab preamp for it. It seems that Aleph P is the most recommended. And there is a Pumpkin preamp. I would appreciate some suggestion on which one to build based on the sound, availability of PCB boards, and helps that I might get from this forum.

Thanks a lot!!
 
#2
well , I'm biased :clown:

I'm finding :Pumpkin: somewhat better than venerable P , even if :Pumpkin: is also sort of already venerable ;

but - my pcbs offering is paused for now , because I'm tired of constant inventing new ways to have Paypal account , while living in country which isn't covered by Paypal . They said it will be operative soon ..... so I'm just waiting for thing to happen
 
#3
That is too bad. I was interested in Pumpkin amp but there seems to be some issue of getting the pcb. Thanks for the explanation.

So is there any other means to get the pcb of either Pumpkin or Aleph P? Is there group buy recently?

Thanks!!
 
#7
I tried ZenMods Pumpkins and am having problems with them. I'm going to try the Aleph P1.7, the circuit schematic is available from KK-PCB but I'm using my own.

My Power Amp is the Aleph 4.

Watch this space I might be selling two Pumpkins and two Shuntkys. They are complete and do work but not quite as expected.
 
#12
KatieandDad said:
I've never bought from KK-PCB but ZenMod had some very derogatory comments about the quality of their boards.
Click to expand...

I can say the traces are fairly small, even on places most people would make them broader....
most important point..... holes are small 😡 ,only small wires have place... I could not place some components, better caps etc.

but they work. 😉
 
#13
pumpkin is very good pre! :cheers:

If you cannot get the shunties working....take another PSU for instance this...
 

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#14
-> Dukja

In case you will have a chance to get mached pairs 2sk170/2sj74BL strongly recomend
JFET-DISPRE II , designed by Pavel Macura ( PMA);
much better then Aleph P ,
I haven't found any competitor in range 1000-1500 USD comercial preamps
( Cambridge Audio 840E , Quad, Vincent ,Xindac)
But you have to take care about transistor matching and use very good pot ( Noble from Percy - as minium )
 
#15
generg said:
I can say the traces are fairly small, even on places most people would make them broader....
most important point..... holes are small 😡 ,only small wires have place... I could not place some components, better caps etc.

but they work. 😉
Click to expand...

all holes on kk-pcb boards are smal. that is so you can drill them to your wanted sice. i think it says so in his documents too.
 
#18
dmsims said:
Is the B1 any good for you ?
Click to expand...

I went through a similar quest for a suitable preamp for my aleph3 as well as the F5. If you don't have efficient speakers B1->Aleph 3 will be found wanting. You need a few db of gain at least in your pre stage for speakers that are 89-90 db or lower in efficiency.

I finally settled on this tube preamp and I have found a great combination. DIY ECC802S (12AU7 / ECC82) Vacuum Tube SRPP Preamplifier

uv.
 
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