|AIR TIGHT ATM-211
|400,000 yen(one set and release time - unknown)
Tube monophonic power amplifier which was announced by the 15th anniversary of
A&M foundation and which hits the model of the 21st century beginning.
As the 2nd phase of Single-Ended Triode Amp following ATM-300B, the direct-heated
triode 211 used as a transmitting tube at the broadcasting station etc.
is adopted as an output stage.
The vacuum-pipe drive amplifier style of all 3 pole pipe composition is
used for an output stage in order to pursue the sound of the direct-heated
triode 211 by no returning (0dB).
High power is investigated by output pipe cathode follower direct
The heater ham is removed by carrying out
direct-current ignition of the 211 filaments.
An output pipe
electrolytic condenser is protected and extension of life-span is attained in
the muting circuit which adopted the relay.
The power transformer of
another winding wire is made for every circuit of a magnification stage / bias /
heater / relay, and the mutual intervention is suppressed.
large-sized transformer of a broadband is adopted.
The situation of an
output pipe of operation can be checked by adopting a bias check circuit.
||Monophonic power amplifier
||Width 390x height 260x depth of 360mm