1 Tube 1 Watt AC/DC Amplifier
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On: 24 Okt, 2018
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This amplifier, utilizing a dual power output-rectifier tube, is suitable for low volume from a phonograph pickup having at least two volts output. Either a dynamic or permanent magnet speaker may be used with equal results, provided directions ar...
This amplifier, utilizing a dual power output-rectifier tube, is suitable for low volume from a phonograph pickup having at least two volts output. Either a dynamic or permanent magnet speaker may be used with equal results, provided directions are followed regarding filter choke L. The usual operation of an amplifier of this type reverse the power plug if the amplifier will not operate.
Because of the few parts used, This amplifier can be build very small and compact, making it ideal to mount in a small phonograph case.
C-1 .05 mfd 400v paper cond.
C-2 10 mfd 25v elec. cond.
C-3 .02 mfd 400v paper cond.
C-4 40 mfd 150v elec. cond.
C-5 40 mfd 150v elec. cond.
C-6 .005 mfd 600v paper cond.
R-1 1 meg ohm volume control
R-2 100 ohm 1 watt res.
R-3 1000 ohm 1 watt res.
J Phonograph jack
SW SPST switch
T 3000 ohms to voice coil
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The feature of this AC/DC amplifier is its low cost due to the small number of parts used. It is quite suitable for phonograph reproduction with good gain capabilities from a less sensitive pickup....
This amplifier is a high gain unit suitable for increasing to headphone level sounds of very small amplitude. The contact microphone is a crystal or magnetic unit attached to an instrumanent soundi...
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3. Earth ground
6. V1 heater connection
7. Line level audio in
The output transformer has its p...
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