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the diagram shows two different types of audio equipment
Double Two Audio Amplifier
Although this design employs only two valves in the amplifier section, it is capable of offering 8 Watts push-pull output for an input signal of the order of 500mV. The amplifier also features an unusual and ingenious treble control circuit. The fairly recently released valve Type ELL80 is a miniature double audio pentode with a common cathode designed primarily for use either in the output stages of stereophonic amplifiers - each section operating in single-ended mode - or as a complete monaural push-pull output stage. Each section has a mutual conductance of 6mA/Volt and anode and screen-grid current demands are modest, these being typically 24 and 4.5mA respectively per section from a 250V supply source.
the 6v6 marlbwod amp is built into a wooden box
The 6V6 Marblewood Amp
This amplifier started out with a stroll through a woodworking store in Oklahoma City, OK. What caught my eye was a single plank of a species of wood with which I’d never worked, “Marblewood” or zygia racemosum. The wood was expensive so I bought a single piece six inches wide and four feet long. Thus was the “Marblewood” amp born.
an electronic device with two speakers attached to the front and back sides, on top of a
A PL-177 Single-ended amplifier -
The PL-177 is similar to the 4-65 tube. But it is a pentode, or more correctly a beam pentode. It adds a supressor grid which is constructed of vanes to funnel the electron stream into beams. It comes in normal (PL-177A) and military (PL-177WA) versions. It also has a close cousin, the (PL-) 6549, which is essentially the same tube with a conventional suppressor grid. I tested all three... the PL-177A and PL-177WA seem completely identical. The 6549 worked well but was slightly less linear.
an electronic device is shown with the words,'81a single dynamic coupled amplifier '
811A Single Dynamic Coupled Amplifier -
As I got a pair of new RCA 811A by chance, I made a dynamic coupled power amplifier to hear the sound produced by the thorium tungsten heater. It is said that the sound of 811A is so refreshing especially in the high audio frequency. The problem is its heater which needs 6.3V 4A. Therefore I bought a big power transformer with two coils of 6.3V 5A.
two diagrams showing how to read the wiring for an amplifier and other electronic components, including
Reading Tube Amp Schematics By Rob Robinette -
The sooner you learn to read amplifier schematics the sooner you'll be able to analyze classic amp circuits and learn how the masters of amp design voiced their amps. It's much easier to analyze an amp circuit by studying its schematic than looking at its layout diagram. The key to learning to read amp schematics is to start small with the Fender 5F1 Champ amplifier schematic and focus on one component at a time to keep from being overwhelmed. Once you can read the simple Champ schematic you'll be able to figure out more complicated amp schematics.
two different types of electronic equipment on top of a wooden table with the words push pull mono
A 6V6 Ultra Linear Push-Pull Mono-bloc Amplifier -
he author built a pair of mono-bloc EL95 push-pull amplifiers in 2016 powered by an old laptop brick with a 15 Volt output. These open board amplifiers function well but the design was limited to 10 Watts HT by the available audio grade HT generator. An output of 2.5 Watts was obtained with a reasonable frequency response but nothing like the excellent performance of the 6V6 amplifier built from a Chinese kit, and the open board construction was experimental not domestic.
power trip a guide to power tubes and their signature sounds
Power Trip: A Guide to Power Tubes and Their Signature Sounds
Whether you’re shopping for a new amp or trying to coax different tones from one you’ve got, this comprehensive look at power tubes and their sonic traits is essential reading.
an amplifier class diagram with two different voltages and the corresponding circuit for each one
Amplifier classes -
You may hear of amplifiers being class A, AB1, AB2, B, C etc. What do all the characters and numbers really mean? Let's forget the numbers for a moment - we will come back to them later. For now, we will look at the A/B/C issues, and in order to do so, we need to recap on how valves (or tubes) actually work.
a wooden speaker with two black sticks sticking out of it's front and side
Shinjitsu Audio | horn speakers | Mesa, Arizona, USA
the diagram for dual valvecaster
My Library
View the full album on Photobucket.
an experiment is shown in this manual for using audio amplifiers to make electronic music
An Experimental 6JH8 Push-Pull Audio Amplifier -
I've been fascinated with beam deflection tubes (also known as sheet beam tubes) ever since I first discovered them in the RCA Receiving Tube Manual. I used one to build a reflexed superhet receiver which was discussed by Joe Sousa in this post. There was also a brief mention made, in that discussion, of the common mode/differential mode simplex technique used in early CBS stereo amplifiers. One evening, with some spare time on my hands, I concocted a rather curious one tube audio amplifier using a 6JH8 sheet beam tube. I tinkered with it in my spare time for a couple of weeks before finalizing the circuit as shown below.
an electronic circuit board is shown in black and white, as if it were printed on paper
KT88-PSE-Amp, von Christoph Lassok
KT88-PSE-Amp, von Christoph Lassok
an electronic device is shown with the words vacuum tube regenerative receiver on it
Vacuum tube Regenerative Receiver on 12VDC -
This regenerative receiver works with a single 12AU7 tube or an ECC83. It is powered by low voltage 12 volts. The tube filament is also heated to 12v. With little component, this receiver has remarkable selectivity and sensitivity. the used coil found in a transistor AM receiver. The LF amplifier part consists of an integrated circuit of the LM386 type.
an electronic circuit diagram with the following instructions
Marantz Model 7 Preamp