Aleph P 1.7 stereo preamplifier.....

[mprivitera1]

hello to everybody,

those who have tried these pcb?

Aleph P 1.7 stereo preamplifier - gold plated PCB stereo set | eBay

I want to build this preamp in a simple way, only with three unbalanced inputs, advice on how to do it.
Does anyone know the input impedance and output impedance?
thanks for your help

 

[Zen Mod]

Dodo link

 

[mprivitera1]

Dodo link

😕😕😕😕😕

 

[sakellogg]

link wont work.

 

[mprivitera1]

EBay Item number: 271405160080

 

[sysco55]

This one?

Aleph P 1.7 stereo preamplifier - gold plated PCB stereo set | eBay

 

[sysco55]

look at this...

http://www.diyaudio.com/forums/group-buys/63356-one-more-aleph-p-1-7-clone.html

 

[Dennis Hui]

Ah...those are Veteran's boards. See discussion here:

http://www.diyaudio.com/forums/group-buys/63356-one-more-aleph-p-1-7-clone.html

Cheers,
Dennis

 

[mprivitera1]

Ok, thanks...

 

[Mr. dB]

Do any vendors actually stock 10uF Wima caps that will fit the lead spacing on these boards, as shown in the photo on eBay?

 

[AudioSan]

here you go: WIMA Film Capacitors | Mouser
i think it's 27.5mm lead spacing(not 100% sure about this)

 

[mprivitera1]

because its wima?

 

[beardman]

The Mouser wima ..have same lead spacing like mine 10uf wima...(i do not use those anymore)
Looks like a fine print those veterans boards

anybody know where to buy matched mosfet ?

 

[AudioSan]

if you'r thinking of the IRF610 i don't know of anyone who bothers to sell matched parts.(chinese e-bay sellers not included)

 

[beardman]

if the irf610 are the only one to mach ..i can buy some and try to mach them myself..or use the ones from my kk board

 

[beardman]

Find in a tread that Mr Pass write ,that the fairchild 9610 mosfet,, is better than the irf 9610
I am not sure if that only was in poweramp..but will like to know if this is the same for Aleph pre

 

[AudioSan]

do not mistake irf 610 for irf 9610.

 

[Mr. dB]

here you go: WIMA Film Capacitors | Mouser
i think it's 27.5mm lead spacing(not 100% sure about this)

I guess the MKS4s will fit, if you don't mind polyester, but the other three high-voltage polypropylenes will fit the lead spacing but the cap bodies will be too wide.

 

[AudioSan]

aha. i don't have tha part footprints for this Board, so i can't check that🙂
but why not use Panasonic film caps instead of wima? that works with this pre amp🙂

 

[beardman]

Audiosan

it was the irf9610 not irf610---here is link

http://www.diyaudio.com/forums/pass-labs/81601-transistor-question-irf9610-vs-sfp9610.html