3 Tube 3 Watt Direct coupled amplifier
Uploaded by: Emma
On: 30 Okt, 2018
Viewed:149 times - 8 hour, 14 minute, 54 second ago
Downloaded: 0 times -
The direct coupled amplifier is always a difficult type of amplifier to construct and keep in adjustment, but is presented here for the more ambitious constructor. As you know, the direct coupled circuit consists of the plate of an amplifier tube ...
The direct coupled amplifier is always a difficult type of amplifier to construct and keep in adjustment, but is presented here for the more ambitious constructor. As you know, the direct coupled circuit consists of the plate of an amplifier tube directly connected to the grid of the next amplifier tube, thereby alloweing a complete transfer of signal variations with a minimum of frequency distortion. With the proper choice of tubes and transformers, a high fidelity amplifier can be constructed when properly balanced.
This balancing adjustment consists of varving R-2, and the semi-adjustable resistor set to such a position that 45 volts can be measured across R-5 by means of a vacuum tube voltmeter. Three watts undistorted power output can easily be obtained with any phonograph pickup or radio tuner connected to the input.
C-1 10 mfd 25 v. elec. cond.
C-2 20 mfd 250 v. elec. cond.
C-3 20 mfd 450 v. elec. cond.
C-4 8 mfd 600 v. elec. cond.
C-5 .05 mfd 400 v. elec. cond.
R-1 500,000 ohm vol. control
R-2 3000 ohm 1/2 watt res.
R-3 5000 ohm 25 watt res.
R-4 1000 ohm 10 watt res.
R-5 100,000 ohm 1 watt res.
R-6 20 ohm 5w center tap.res.
R-7 25,000 ohm 10 watt res.
T-1 output trans: 2500 ohm to voice coil 5 watt
T-2 Power trans: 325-0-325 v @ 75ma
L Filter choke 200 ohm 75ma
J Imput Jack
SW SPST switch
Sockets: 3 octals
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...
Because of its greater gain, this amplifier is capable of fair volume with any type crystal phonograph pickup or radio tuner. It delivers up to 1 1/2 watts output, which is about alll average 3" sp...
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 ...
3. Earth ground
6. V1 heater connection
7. Line level audio in
The output transformer has its p...
The Traveling Wave Tubes differs from the klystron in that the radio-frequency field is not confined to a limited region but is distributed along a wave-propagating struture. A longitudinal electro...
As the fastest growing demand of circuit and wiring diagram for automotive and electronics on internet based on different uses such as electronic hobbyists, students, technicians and engineers than we decided to provide free circuit and wiring diagram base on your needed.
To find circuit and wiring diagram now a day its easy. E-learning through internet as a right place to search an exact circuit and wiring diagram of your choice and it's much fun and knowledgable. On internet you will find thousands of electronic circuit diagrams some are very good designed and some are not. So you have to modify them to make them according to your needs but some circuits are ready to make and require no changes.
There are many categories of circuit and wiring diagrams like automotive, audio circuits, radio & RF circuits, power supply circuits, light circuits, telephone circuits, timer circuits, battery charger circuits etc. There are many types of circuit and wiring diagrams some are very easy to build and some are very complicated, some are so small and some contain huge list of parts.
We provides free best quality and good designed schematic diagrams our diagrams are free to use for all electronic hobbyists, students, technicians and engineers. We also provides a full educational system to students new to electronics. If you are new to electronics you are a student or a electronic hobbyist and want to increase your knowledge in electronics or want to understand electronics in a very easy way so this is the right place for you we provide electronics beginner guide tutorials to easily understand complicated electronic theory. Our mission is to help students and professionals in their field.