Книга: Valve Amplifiers Explained
Назад: Notes on Terminology
Дальше: 1: Introduction

Safety When Working with Valves

The reader needs to be aware of the potential dangers when working with equipment
utilising valves.

Valves operate with high DC voltage, and for RF amplifiers, high RF voltage. The voltages typically used can be extremely hazardous and any contact with these is certain to lead to adverse affects to human life. It is therefore necessary to observe strict safety precautions when working with equipment of this type.

All equipment designed to be powered from the public mains supply must be correctly wired and grounded to the public mains earth. Fuses used should be appropriate for the equipment.

When testing or making measurement, often parts are exposed with hazardous voltage connected. Extreme caution needs to be used so as not to accidentally come in contact with these items.

If a protective cover needs to be removed to gain access to a portion of circuitry, the equipment must be powered down and high voltage reservoir capacitors should be discharged to ensure no lethal voltages are present.

If safety devices need to be ‘cheated’ to make the circuit operate, this must be only for the duration of the special test requirement.

In the case where a protective cover needs to be opened to allow access great care must be taken if the circuitry is subsequently powered up to assess the working conditions within the circuit. Anode circuitry of RF amplifiers emit strong electro-magnetic radiation with the covers removed. This can be harmful and operation with covers removed should be kept to a minimum.

All test equipment used must be suitable for the intended testing required and capable of withstanding the high voltages present. Many DVMs are not rated above 1kV AC or DC and hence special measuring equipment may be required.

It is preferable to have a second person close by in case of an incident, who can interrupt the operation by switching the equipment off should an emergency arise. If the person making the measurement is uncertain of any aspect, an experienced person should supervise the operation.

Valves contain a very high vacuum, which normally is safe. However, if undue stress is placed on a glass envelope it can break and the result will be an implosion. This can cause severe cuts and other injuries to a person nearby. Valves not in use should be stored in the manufacturer’s packing or carton until required for use. Care must be taken not to damage glass envelope valves when inserting or removing them from equipment. If disposing of a faulty valve, which may contain hazardous material, correct disposal methods must be followed. Your local legislation should be consulted about the steps that are required.

The author and the publisher cannot be held liable for any damage to person or property should an incident arise from working with valves.

Назад: Notes on Terminology
Дальше: 1: Introduction

Poppy Vanwinkle
Greetings! Welcome to SourcingIC.com!! We are Hong Kong representative of the complying with IC brand names for 15 years: TOSHIBA ALTERA ANALOG TOOLS TEXAS TOOLS ST FAIRCHILD ATMEL XILINX INTEGRATED CIRCUIT SAMSUNG PROVERB NEC NXP ON SEMI PHILIPS FREESCALE INFINEON INTERSIL LINEAR MODERN TECHNOLOGY MOTOROLA I know you may require to find ICs. The significant objective for us is sourcing ICs. As you understand greater than 99% ICs readily available in this planet can be located in China, however it is time-costly to locate or send out queries to thousands of distributors or firms one at a time to find who got stocks as well as get excellent quotation! Step 1: Skype or email our colleague: [email protected] Action 2: Inform us component number and also the amount or other requirements Action 3: I will certainly resource from providers and our colleague will select the trustworthy distributor to price estimate Tip 4: Our seasoned IC technicans will certainly check the ICs to verify they are brilliant and working well Step 5: Well packed and shipped Repayment Technique: Paypal/ Western Uniuon/ TT See you! Ideal Regards, Sourcing IC To supply every rare ICs Business History: Souring IC Ltd is a Hong Kong based company with China workplaces in different provinces. We supply a wide variety of electronic components, concentrated on IC consisting of Sound IC, Power Management IC, Consumer Electronic IC, and so on. Our objective is to supply any kind of parts which are difficult to be sourced in the digital market, particularly the one discountinued by factories. With the assistance of latest A.I system and also the elite colleagues we possessed, we are able to source every ICs that is not generally utilized by the co-operation with thousands manufacturing facilities as well as agencies in China. We have the ability to give the most competitive rate without MOQ.
So grossly full of errors to not be worth reading. Ex: " In low power applications a suitable APC is a 5W wire-wound resistor of about 22Ω to 47Ω. This eliminates winding an inductor as the resistance wire forms the inductor. " The wire in the resistor forms a SERIES inductance, not parallel as in a parasitic trap, there fore, useless. The energy dropped across the inductor is not consumed by the resistor as in the proper, parallel trap case. (from small signal AC model of resistors from Vishay Engineering) Whomever wrote this is full of words, but knows nothing about this topic otherwise and should be ignored as another drama queen on the internet K8BYP 2019
thesis statement for argumentative essay do my science homework do my maths homework for me
college essay yoga writing a great college essay the value of a college education essay
essay writing jokes writing a college essay biology assignment help
writing an acceptance speech great cover letters dissertations writing
politics essay writing ppt on essay writing my experience in college essay
math help homework essay editing college essay tutoring
hsc essay writing writing a dissertation abstract thesis statement
do my math class argumentative writing essay help me do my resume
pharmacy open near me pharmacy discount card discount pharmacy card
rx pharmacy ed treatment 24 hr pharmacy
erectile tops pharmacy pharmacy orlando
best drugstore bronzer nearest drug store best drugstore face moisturizer
peoples drug store best drugstore shampoo california pharmacy
canada prescriptions drugs board of pharmacy canadapharmacy
mastercard cash advance procedures 24 hour payday loan over the phone rapid advance loan rates
yuppie payday loans cash advance without personal check payday loans edmonton ab
same day cash loans bad credit australia cash america pawn payday advance payday loans phoenix az
payday loan relief services company payday loans vernon al ufcu credit card cash advance
best payday loan company review payday loan emergency money ssi cash advance
ec finance - personal cash loans khayelitsha south africa how to make payday loans disappear payday loans in madison heights va
equicom cash advance apr cash advance calculator augusta cash loans
cash advance liberal ks payday loans in rosenberg payday loans financial times
quickquid payday loan promo code can you get a cash advance on a credit card without a pin number everyday payday loans lafayette la
cash advance boise payday loans in webster texas payday loans wrong
Vantin Viagra Oral Jelly aarp recommended canadian pharmacies
prices pharmacy Fluoxetine Micronase
ez pharmacy buy low drugs canadian pharmacy indianpharmacy com
canada drugs superstore rx plus pharmacy vipps pharmacy in canada
lamictal canadian pharmacy pharmacy in ontario canada walmart pharmacy price check
erectile dysfunction medications cheap prescription drugs north west pharmacy canada canadian prescription drugstore ’
losartan and hydrochlorothiazide cost of lisinopril hydrochlorothiazide potassium wasting hydrochlorothiazide 12.5 mg side effects ’
atorvastatin and simvastatin does lipitor cause ed atorvastatin for cholesterol lipitor indications ’
compatible medication to duloxetine bestt time to take 120 mg duloxetine cymbalta for back pain cymbalta lawsuits ’
zoloft and tramadol ssri sertraline sertraline adverse effects sertraline half life ’
hydrochlorothiazide allergy lisinopril and anxiety hydrochlorothiazide and potassium lisinopril withdrawal ’
can you take omeprazole when pregnant omeprazole and clopidogrel prilosec not working why omeprazole is taken in the morning ’
amlodipine blood pressure is norvasc safe amlodipine drug norvasc withdrawal ’
norvasc dosage side effects amlodipine for dogs amlodipine/valsartan 5/160 mg do side effects of amlodipine go away? ’
phd thesis search phd degree
coursework on a resume design coursework
thesis publishing master thesis writing service
cheap custom essays academic essay writing services
editing essay services help writing essays for college
thesis consultant editing thesis
coursework service coursework writers
writing essays help write my essay fast
paper writing website pay someone to write a paper for me
phd by thesis only good thesis writing
dissertation methodology example dissertation research proposal
dissertations help dissertation formatting
thesis writing services uk thesis statistics
Fernando Martín
Para diseño de preamplificadores