Download e-book for kindle: Building Valve Amplifiers (2nd Edition) by Morgan Jones
By Morgan Jones
Development Valve Amplifiers is a distinct hands-on advisor for somebody operating with tube audio equipment--as an electronics hobbyist, audiophile or audio engineer. This 2nd version builds at the luck of the 1st with expertise and process revisions all through and, considerably, an immense new self-build venture, labored via step by step, which places into perform the rules and strategies brought during the book.
Particular recognition has been paid to answering questions frequently asked via beginners to the area of the valve, no matter if audio fanatics tackling their first construct or more matured amplifier designers looking to know about the layout rules and trade-offs of "glass audio." protection concerns are continuously to the fore, and the sensible aspect of this ebook is strengthened by means of a number of transparent illustrations throughout.
• the single hands-on method of development valve and tube amps--classic and modern--with at least theory
• layout, building, fault-finding, and checking out are all illustrated through step by step examples, permitting readers to obviously comprehend the content material and achieve their very own projects
• incorporates a entire self-build amplifier undertaking, placing into perform the foremost options brought through the book
Read Online or Download Building Valve Amplifiers (2nd Edition) PDF
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Development Valve Amplifiers is a special hands-on consultant for a person operating with tube audio equipment--as an electronics hobbyist, audiophile or audio engineer. This second variation builds at the luck of the 1st with know-how and approach revisions all through and, considerably, a big new self-build venture, labored via step by step, which places into perform the rules and strategies brought during the e-book.
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Additional info for Building Valve Amplifiers (2nd Edition)
Less obviously, avoid routing wires near hot resistors. If a wire becomes too hot, its impaired insulation may leak current between circuits leading to impaired performance and possibly fire, so it is important to ensure that the wiring is rated appropriately for the current to be passed. This means that wire current ratings are determined by ambient temperature, ability to cool, and the temperature rating of the insulator. 3. 5 6 22 18 14 12 Chassis layout PTFE has a higher melting point than PVC, permitting greater self-heating and thus a higher current rating than might be expected from a given conductor diameter, but the penalty of using a small-diameter conductor (having higher resistance) at high currents is that voltage drops along that wire are proportionately higher, and this can become significant within the capacitor/rectifier/transformer loop of a power supply.
Valves are microphonic because any relative movement between control grid and cathode alters the local electric field (volts per metre) and therefore the number of electrons reaching the anode. When the grid structure is placed closer to the cathode to increase gm, the same movement becomes proportionately greater, so valves having high gm are intrinsically more microphonic, although the more rigid frame-grid construction tames the problem. Indirectly heated valves have a rigid and firmly located cathode structure, but directly heated valves 39 Building Valve Amplifiers must support their heater loosely (to allow for thermal expansion), necessarily producing a cathode structure less rigid than the grid and thereby even more prone to microphony.
Wiley (1988), ISBN 0-471-85068-3. Slightly misnamed (its main focus is interference reduction), this was one of the first books to formally cover EMC and is still one of the best. J. Goedbloed, Electromagnetic Compatibility (Phillips Research Laboratories). Prentice-Hall (1990), ISBN 0-13-249293-8. Given that Philips was a component manufacturer at the time, this excellent book contains plenty of theoretical considerations for component design and usage backed up by measurements. E. Zepler, The Technique of Radio Design.
Building Valve Amplifiers (2nd Edition) by Morgan Jones