Pure
Tube® OTL – no output transformator / capacitor
Dubble mono amplifiers
High quality potentiometer
6,3 mm stereo jack for headphone
Switchable output impedance: 30, 60, 300 and 600 ohm
Tubes: 2 * ECC82, 1 * ECC99, 4 * 6C19
Output power 0,8W 30 ohm, 1,2W 60 ohm, 1,9W 300 ohm, 1,7W 600 ohm at
1kHz 1%THD
Bandwith 10 – 650 000 Hz -3dB
Dampfactor > 10
THD+N @ 1,0Vrms in @ 1000Hz (can vary between individuals)
0,09 %, 33 ohm
0,09 %, 56 ohm
0,08 %, 330 ohm
0,08 %, 600 ohm
Recommended maximal input signal at full volume: 2.2 Vrms
Download manual here:
In order to
construct a tube amplifier with low output impedance you need tubes
that have low inner resistance. It is not easy to find tubes that match
that criteria. For this construction the NOS Russian tube 6C19 was
choosen.
