Why Don't I service Some Amplifiers? Well, Voltage is the Simple Answer

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Күн бұрын

Пікірлер: 40

@Tekjive 3 ай бұрын

100% …crazy to think the ones who originally blew up their own gear can blame the techs who have the ability to repair their mistakes …lol. Awesome vid and will be referencing it multiple times, ty for making it bro 🤙🏻

@ellensburgamplifier 3 ай бұрын

Knowing the rail voltage will help answer questions if they arise. As they say, what does SALT stand for and why was it implemented.

@michaelcarey 7 ай бұрын

Wow! That is some serious +/- voltage in an audio amplifier! I'm used to being VERY careful working with tube based radio amplifiers. The DC voltage on the anode of these amplifiers can exceed 2kV which will extinguish your life in an instant.

@ellensburgamplifier 7 ай бұрын

Indeed! This business started as a vacuum tube tester restoration business and the voltages are indeed high.

@ThatsMrMark 7 ай бұрын

Exxxxactly man PREACH!!! I don't usually work on Koreans but I just worked on a pitbull 20K 2 days ago, and she's definitely scary. What I always tell customers is, to remember you're amplifiers already coming in for repair, if I repair it, You get it back and put it back into the same situation I can guarantee you the same exact results.

@ellensburgamplifier 7 ай бұрын

Exactly!!

@JasonWW2000 7 ай бұрын

From what I understand, 48 volts and lower is classified as low voltage and is fairly safe. As you go above 48 volts the likelihood of an electric charge overpowering the resistance through your body becomes more and more likely. 60 to 80 is dangerous territory and we all know 120 volts will definitely flow through you. If you're lucky, the charge will not stop your heart. You'll just get one heck of a zap. On rare occasions though it will stop your heart and you'll need to be resuscitated.

@ellensburgamplifier 7 ай бұрын

You are correct!

@trollmode3863 7 ай бұрын

Thank you for repairing my Sundown SFB8K. It's working great

@ellensburgamplifier 7 ай бұрын

Great to hear!

@strictlyamps820 7 ай бұрын

Great video Todd, I added it to my website.

@ellensburgamplifier 7 ай бұрын

Thank you! I had to get a video out on this as many people are asking me why I am no longer servicing certain amps.

@MyBlowncobra 7 ай бұрын

So 14.8 is no no..good video Todd..are there amps or boards you really like dealing with..and for all of you looking for a tech,Todd is a real class act, ridiculously cool guy to deal with .the only guy on the West Coast for me.😊

@JasonWW2000 7 ай бұрын

I think he's saying 14.8 volts okay, but higher is not something he wants to deal with.

@ellensburgamplifier 7 ай бұрын

I think getting above 15 is trouble for these. Don't get me wrong, it may run just fine at 16 for who knows how long but as a business owner we have to evaluate risk and liability.

@ivolol 4 ай бұрын

14.8V comes from the typical lithium voltage of 3.7V, multiplied by 4 in series. However the top charge of such batteries (ie when your pack is at 100% charge) is instead 4.2V, which would create 16.8V, and bottom is likely somewhere around 12-13V. So that is a comparatively large voltage swing when being multiplied by 12 as in this example. So if you wanted a lithium battery bank to only ever be at around 15V or lower, you could NEVER charge it above ~90% capacity. Forget trying to do that as a human, at some point you're gonna trip up and let it get to 100%.

@JasonWW2000 4 ай бұрын

@@ivololThe 14.8 volt comes from the stock battery or lithium iron phosphate cells, not from your typical lithium ion or lto cells.

@j3rs3ysfin3st97 7 ай бұрын

Another great video 👍. Would love a video of how you built your discrcharge resistor setup

@ellensburgamplifier 7 ай бұрын

I will squeeze one in ;)

@JasonWW2000 7 ай бұрын

I think you can buy those type of devices. I remember seeing one that had an LED on it that lit up and as the charge dissipated the LED would go out to let you know when there was no voltage left.

@ellensburgamplifier 7 ай бұрын

@@JasonWW2000 I think I have seen things like that in the past. It would be easy to make one.

@elpechos 7 ай бұрын

The amplifiers don't have any feedback to regulate the high voltage supply?

@ellensburgamplifier 7 ай бұрын

Wouldn't that be awesome! Nope, as I like to say Korean power supplies are "dumb" as they have no clue whatsoever about what the output is doing. They do have one form of protection, kinda, the thermal circuit which is still worthless.

@elpechos 7 ай бұрын

@@ellensburgamplifier Nasty. Some regulation probably wouldn't even add much to the cost