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Build Your Own Current Limiter for Protection when Repairing and Testing Electronic Equipment 121gamers 1 ビュー • 2 年前に

This video describes, in detail, how to construct a Current Limiting Device to protect you, your test equipment, and any electronic gear that you are testing or repairing. When used properly, it prevents short circuits from causing additional damage, particularly to expensive power transformers in amplifiers. It is also quite useful when first powering up previously untested and vintage equipment. It is not suitable for use with medium to large electric motors.

The bulb functions as a high-wattage resistor in which the resistance increases with the increasing heat of the filament. A "cold" bulb may offer only 2 or 3 ohms of resistance (the higher the wattage, the lower the resistance), but this will rapidly rise as the filament heats, particularly in the case of a short circuit.....protecting the circuit and dissipating the resulting filament heat in the form of light (warning you of the existence of the short).

IMPORTANT NOTE: The wattage of the bulb must be tailored to the current draw of the device being protected. The high-wattage bulbs (200W+) recommended in the video are primarily for Tube Amplifiers, which operate at relatively high current levels. With lower-current devices, such as Solid State amps, a lower wattage-higher resistance bulb (even as low as 40W) may be required for circuit protection.

For viewers in areas with 220-240VAC power: Although your voltage is double (220VAC vs 110VAC), your current flow is about half. Since the Current Limiter (CL) depends on current to rapidly heat the filament and increase its resistance, you need a bulb with higher filament resistance. Since the filament resistance of the bulb decreases with higher wattage, you should try a lower wattage, higher resistance bulb.....i.e. a 100W......initially, and then fine tune the wattage depending upon the power demands of the amplifier being protected.

Also, in my wiring diagram within the video, the "hot" AC lead is connected to the threaded socket of the receptacle, which could possibly be touched while changing bulbs. Some viewers have suggested that shock exposure could be reduced if the "hot" lead went to the contact at the bottom (center) of the socket. Please consider this when wiring your own Current Limiter.

The Photoflood Bulb used in this video is available on Amazon. Here is a link: http://www.amazon.com/Eiko-Sup....reme-Photoflood-Ligh

If you enjoy seeing videos featuring classic vintage jukeboxes and guitar amplifiers, please consider subscribing to my channel, to gain easy access to over 100 related videos and to be notified when new videos are posted. Thanks for watching !!!

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How to make Electronic Signature 121gamers 1 ビュー • 2 年前に

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0:00 Intro

0:29 Create your electronic signature

2:07 Add signature to your documents,

5:22 Get electronic signature from other people on any document

📌 𝗙𝗼𝗹𝗹𝗼𝘄 𝘁𝗵𝗲𝘀𝗲 𝘀𝗶𝗺𝗽𝗹𝗲 𝘀𝘁𝗲𝗽𝘀

Click here ➜ https://www.signwell.com/online-signature/

It will take you to signwell website

Just scroll and you will find two ways to create your signature

1st way : Draw signature

Just click on ‘draw signature’ & you will find a blank square

where you can draw your signature either by using finger or pen,

then choose the color of your signature

To download the signature, Click ‘save’ and enable transparent background

And click ‘download’

To add signature to your documents,

Step 1: Create account in signwell

Click here ➜ https://wl.tools/signwell

And create your account

Step 2: Upload document in which you want to add signature

Just drag & drop the document from your computer & click ‘Continue’

Step 3: Add your electronic signature

Click on the place you want your signature

Select the option on how you want to add your signature

Once you have added your signature just drag the signature to increase the size

To download the document click share ► PDF download and download the document

To get electronic signature from other people on any document

Go to document page of your signwell account, click ‘new document’

Select ‘upload document and add your document, & click ‘Continue’

Next, enter the details of people from whom you want signature & click ‘Prepare’

Click on the place you want your signature, & select people who can add signature

To send the document, click ‘Send’ & enter the message & click ‘send’

Once the person add the signature,go to signwell account

Click ‘Refresh’ and you will find the document with signature

Download the document by clicking ‘save as’.

So this is how you can get electronic signature.

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