B1 Buffer Preamp

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#2,044
I replaced mine with some nice Bournes linears. Not 'audiophile' but smoooth.

I am very impressed with the transparency of this device. Built almost entirely out of my parts box, no esoteric parts (10u Wima MKP4s 250V for the main caps. I like the wimas in my headphone amps quite a bit).

A bit sorry I waited this long to build it! Better late than never. Thanks Nelson and Colin for a great contribution.
 
#2,047
wiatrob said:
I replaced mine with some nice Bournes linears. Not 'audiophile' but smoooth.

I am very impressed with the transparency of this device. Built almost entirely out of my parts box, no esoteric parts (10u Wima MKP4s 250V for the main caps. I like the wimas in my headphone amps quite a bit).

A bit sorry I waited this long to build it! Better late than never. Thanks Nelson and Colin for a great contribution.
Click to expand...

Which Bourns pot did you use? Plastic film or cermet?
 
#2,052
I think i found a nicer chassis for this project, 180$ With external case for psu.


High End Black Full Aluminum chassis, 2xchassis /GA-9 - eBay (item 290344838827 end time Dec-28-09 03:50:32 PST)

Front

ga-9all_1.jpg


back

ga-9all_2.jpg
 
#2,055
Well finally got mine finished today, even though some parts are on back order,Aura Teflons for the 1uf and a 25k goldpoint pot. Mine uses a single Teddyreg between rectifier board and input to give a lovely clean 24v. I started the build considering a Wallwart so my choice of 10k uf Mundorfs for C1 and C2 is now looking a little silly.

Just needs sticking in a cleaned up Naim shoebox case and I'll post some pics.

Thanks once again Nelson, an awesome little pre.
 
#2,057
B1.jpg

Ok here we go pictures, apologies to Nelson for housing his creation in a Naim shoebox with old Chrome bumper 42.5 faceplate. ( The balance switch is actually the source switch, and the right hand dial is cosmetic only.

Small double pcb inside is a pair of teddyreg boards, only one side used. Plugs are CMC super Cu, they cost more than the rest of the amp did! (Well at least until the Teflons arrive). ;-)
 
#2,059
The pot is a 25k Noble dual log, and I had a few of them lying round my bits box. I chose them a year or so back in preference to the Alps Black which Naim used in their older pre's. That said it's being replaced with a Goldpoint, if it ever actually arrives, 14 days and counting.

All caps currently in use are from, Audiophile MKP :: Film / Foil :: Capacitors :: Passive Components :: Electronic Parts :: Banzai Music I've never found them cheaper anywhere else. The Blackgate was a Spare I had floating round.

The Aura Teflons are coming from AudioCap: The Audio Capacitor Online Shop
 
#2,060
sq225917 said:
The pot is a 25k Noble dual log, and I had a few of them lying round my bits box. I chose them a year or so back in preference to the Alps Black which Naim used in their older pre's. That said it's being replaced with a Goldpoint, if it ever actually arrives, 14 days and counting.

All caps currently in use are from, Audiophile MKP :: Film / Foil :: Capacitors :: Passive Components :: Electronic Parts :: Banzai Music I've never found them cheaper anywhere else. The Blackgate was a Spare I had floating round.

The Aura Teflons are coming from AudioCap: The Audio Capacitor Online Shop
Click to expand...

Would you be willing to part/sell with a 25k noble & 2 caps ?
 
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