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!!
Thanks a lot!!
well , I'm biased
I'm finding somewhat better than venerable P , even if 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
I'm finding somewhat better than venerable P , even if 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
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.
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.
diyAudio store have PCB for B1.
kk-pcb have PCB for aleph p.
I wasn't aware of the diyAudio store. Definitely will check it out.
I read some comments on KK-pcb but will look into it if there is no other options.
Dukja nice to see a fellow Headfi-er (and HE-6 owner here)
B1 thread
http://www.diyaudio.com/forums/pass-labs/124889-b1-buffer-preamp.html
B1 thread
http://www.diyaudio.com/forums/pass-labs/124889-b1-buffer-preamp.html
I've never bought from KK-PCB but ZenMod had some very derogatory comments about the quality of their boards.
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.
-> 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 )
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 )
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.
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.
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.
I thought about doing it but I decided not to drill larger holes in these small traces and "eyes" .....
Is the B1 any good for you ?
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.
I thought about doing it but I decided not to drill larger holes in these small traces and "eyes" .....
okei. i drilled up for power cables and speaker cable, and had no problem.
and for the NTC on aleph P PSU.
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