Aigner's test version of a 5687 based line stage with two kinds of
output transformers (using parafeed and ultrapath circuits to choose
from, so it was a great way to compare both concepts. For my dream
preamp, we finally decided to use the parafeed circuit -> see
below.) Joe's designs are fully homebrewed but highly musical and
enjoyable; a truly great linestage ...
mounting transport rolls under his new 'ultimate' power supply rack.
This rack houses all the equipment power supplies,
for the line stage, phono stage and power
which are all tube rectified, of
The chief attraction is that all power supplies use three-phase current.
50/60 Hz related hum problems anymore. As you can see on the
of iron used makes it a heavy load...
top, Joe's 4-channel power amplifier using the venerable 10Y &
801 DHT triodes (driving the mid and tweeter section of Joe's
speakers). Below, one of the 211 mono-block amps for the bass with a
211 as a driver (very cool, ZEN-like ... no wonder, it's a Sakuma San
design philosophy). It's fun to have a friend who is able to build
all this amazing gear!
is the full view of the tube amp
plus active crossover (left) and the
Aigner's line stage design with a lot of iron (Sowther volume
trannies, one 6H30pi double triode tube with battery bias and Lundahl
output trannies using a parafeed circuit) and external power supply.
matching external power supply with Lundahl choke and two TV damper
tubes for rectification.
view of these impressive three-phase current power supplies. The
power transformers are custom-made here in Austria. Rectifier tubes
used are TV-damper tubes. Soon, I will have the chance to audition
Joe's equipment with all the new power supplies.
latest project (January 2006 version); his dream LS-system
(wave-guide loaded bass drivers, which are vintage 15" Altecs,
horn for mids and tweeter section; read more about this project here)
of Joe's new dream loudspeakers finished (January 2006 version). The
wood used for the cabinet is birch plywood. These are highly
impressive speakers (in size and sound), that's for sure.
will be some more fine tuning and a full room measurement of these
babies to optimize the performance, but I think Joe has ended his
quest for the ultimate speaker for a long time.
RCF bass in a wonderful handmade piano black cabinet with David's
elliptical horn system for mid and tweeter section. (These have
to go - without horns - due to Joe's new dream loudspeakers shown above...)
sure there will be more to report on Joe's great tube amp designs in
waiting for some of David's LS designs (incl. horn-loaded systems) click
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