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Bartolomeo Aloia Kits from 25 August 1999 |
I maintain this web page because this man has always been my guide and the
knowledge gained from his many articles published on Italian magazine have given
me the foundations to realize my projects in these years. |
YEPUN - Solid state Hi-end voltage amplifier
This is a solid state voltage amplifier
with not common characteristics working as a pure transconductance amplifier.
Using this configuration this module have a very low distortion without global
feedback.
It can be used like a line preamplifier with a 5Kohm output volume control or
like voltage amplifier for current amplifier stages.
Output impedance less than 1 ohm
Voltage gain
variable from 9.5x (19.5dB) to 150x (43.5dB)
Output offset
zero (dc op-amp servo included)
Power supply range dual 70 to 80 Volt
Frequency response
DC to 200KHz with 10x gain, DC to 60KHz with 100x gain
Available in kit or assembled and tested.
HP-REN-OS - Solid state Hi-end current amplifier
Output power
200W on 8ohm and 350W on
4ohm with 70V
Power supply range dual
50-70V for final stage and 60-80V for the driver stage
Global feedback
zero
DC offset
zero with op-amp servo
Frequency response
DC to 500KHz
MSCA circuit to prevent final stage switch-off.
Integrated DC loudspeakers protection and current limit protection to 450W on
2ohm.
It can be driven by YEPUN
voltage amplifier or directly by a vacuum tube stage
like a SRPP.
Available in kit or assembled and tested.
VTA the Last One Tubes Amplifier by Bartolomeo Aloia
(click on images to enlarge)
It is a PP/60 watt, complex/expensive implementation the output tubes are 8 EL34 for channel
to get 60 watt and only 4 EL34 for channel in the reduced power version 30 watt called TDA-2
Specifications:
Output Power 8 ohm (THD 1%) 60Watt
4 ohm (THD 3%) 90Watt
2 ohm (THD 3%) 70Watt
Signal to Noise 95db
Sensibility 0.3Volt
Imput impedence 100KOhm
Frequency response 3Hz to 60KHz
Tubes 8 EL34, 6 6922/E88CC (last version)
Size and Weigth 45 x 65 x 30cm (l x d x h) 55 Kg.
Feedback zero (0db)
Kit available excluding the chassie about 2700$ for the 60watt and 2000$ for the 30watt
VTAF Volks Tube Amplifier The First by Bartolomeo Aloia
(click on images to enlarge)
It is a PP/15 watt, very easy implementation but great sound
the V1 and V2 are two 12AX7WP -> 12AX7
with the 2 sections
paralleled and the V3 and V4 are EL34
Specifications:
Output Power 8 ohm (THD 3%) 17.25Watt
4 ohm (THD 3%) 20.88Watt
Sensibility 1.7Volt
Imput impedence 100KOhm
Frequency response 2Hz to 70KHz
Feedback
only 3db
Kit available excluding the chassie about 1000$ for the 30watt and 750$ for the 15watt
(click on images to enlarge)
It is an hybrid amplifier with tube voltage/driver stage and transistor output stage.
There are a version integrated with a tube line pre stage.
Specifications:
Output Power 8 ohm 50Watt
4 ohm 75Watt
Sensibility 1.7Volt
Imput impedence 100KOhm
Frequency response
10Hz to 30KHz
Feedback zero (0db)
Kit available excluding the chassie about 560$ and 620$ for the integrated version
(click on images to enlarge)
It is an incredible sound 30watt single ended tube amplifier with 6C33C-B or 845 output tubes
and very important and unique in the world is that you can get 30 watt with one single triode
and with the 6C33C-B without use high voltage!
Specifications:
Output Power 8 ohm (THD 1%) 30Watt
Imput impedence
100KOhm
Frequency response 10Hz to 30KHz
Feedback from 0db to 6db
Kit available in 3 versions from 1300$ to the top version with the 845 output tubes at 2700$
BA211 - the 211 Single Ended Power Amplifier by Bartolomeo Aloia
(click on images to enlarge)
Kit available escluding the chassie about 1500$
(click on images to enlarge)
It is a no compromise tube preamplifier without capacitors on the signal and
with a very complex
power supply sections: all inductive, slow turn-on,
regulated and no electrolitic capacitors
The kit for the line stage escluding the chassie and controls about 1200$
VTPA The Last - Phono stage MM-MC "APPS" by Bartolomeo Aloia
This good low noise phono stage has been used in the Andrea Ciuffoli project: Phono 3
Cost about 1000 euro for the assembled version with vacuum tubes and with the complete power supply.
Available in kit or assembled and tested.
rear and front photo (click on image to enlarge)
It is a good 30 watt Push-Pull
40db of feedback - hi-end sound with simple circuit
Finished cost 30000 euro for a pair.
NOTE: The Beyma is connected with a filter to reduce its efficiency and
to extend the low frequency response.
Bartomeo Aloia
Corso Savona 4
10024 Torino
ITALY
tel. ++39 (0)11 644342
email:
bartolomeo.aloia@fastwebnet.it
