It
all started with a radio (tube) receiver from the 50’s that came up with a pleasantly
warm sound.Tube amplifier ______ Obsidianer
Project Stone
It
all started with a radio (tube) receiver from the 50’s that came up with a pleasantly
warm sound.
I concepted and build the circuit as minimalistic as possible. The most remarkable change to the old manners is that I doubled the circuit and also instead of the original tubes I used stronger tubes as they were used in the TV- Sets at the time in the line output devices.
Device to be used as: stereo Class A tube amplifier (with 2 triodes u. 2 pentodes) “line out” compatible audio amplifiers for the connection to any source such as a CD Player, a tuner or computers.
The large button on the front side transfers physical impulses to four micro tracers (for adjustment of ready status, volume and balance. at present still external potentiometers are used)
Size B/H/T: 11.8 x3.9 x9 inches
The power input amounts to 365 mA at 230 V~
(= 84 VA, like two regular lamp bulbs)
Power output: approx.. 5 Watts (sinus) for each channel (it will make the right (the wrong?) impression in the neighborhood – two fat tube radios!)
Speaker: 2x 8 ohms
Weight: 21 lbs
2008
