final aleph 3 sound test
I just finish sound test on my new aleph 3 + tube preamp setup
and the sound is very good.
-one transfo for both channels + 2 x 35A bridge +2 x 68000uF
-after separate LC sections for right and left
-total cap 408000uF +4 x 1.2mH
-25 v rail and 2A bias
-power supply ripple is 25mV
-hum is very low
-oversize heatsink for around 40C to 45C after 3 hrs
-exactly 50% ac gain
-6SN7 5ma ccs gain=20
-6AS7 70ma cathode follower (beefy buffer :-)) gain=.5 zout=100ohm
-transistor HV regulator for low hum
-ac heater with 2x 33ohm to ground on heaters
-more hum with preamp ON but it s ok
my question is:
If i understand aleph 3 give second harmonic like tube
and for me a tube preamp is the natural way to go but
don t seem very popular on diyer so i would like
to get all your feedback , test, opinion, on
(tube preamp) vs ( ss preamp like boz) to drive aleph amp
for consequences on the sound
Opinion varies widely, but there is good acceptance for
both tube and solid state with this amplifier.
First Mr Pass thanks for your public aleph schematic
i m very happy with the result.
So i m not complely wrong with my tube preamp but
with just one answer i feel lonely :-) maybe next
winter i will follow the main current with boz preamp
or maybe there is a new jfet preamp on the design
board like the new jfet power amp.
I have a aleph 5
I feed it with a preampli with lamp : the KTR
http://www.isasarl.com/ and "publication"
the result is very good. much life, much space, I like much...
I arranged my bosoz in a paperboard :(
excuse my English…:cannotbe:
Comparative between bozoz , ktr, kaneda
it s very interesting.
Merci Phill je vais tout lire cette semaine
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