I think I'm a maniacal to put resistor in all same direction because i want a good visual impact for my repair, but now I know I'm not only 😅. Great stuff
I just realized that you sent out some amplifiers today. Should be no issues but do keep in mind when I mentioned the issues about repairing the MRD board.
There are a few reasons. A stressed power supply, faulty drive transistors, bad gate drive, bad RC snubber. Anything that will cause an excessive load or short across the power supply will cause the FET's to fail. I typically see shorted outputs with failing power supplies here on the bench.
What is the output voltage of this amp on 2 ohm? Can it support 1.5 ohm? Whats about ir2184? Is it good or 2110? And sir last question i can't understand why 260n was gone hot?
Thank you for the comment. I will do my best to help answer the questions. The output voltage is roughly 32 volts at 2 ohms (not clipping) and as low as 25v down to 1 ohm into clipping. This is at 12v input. You will get higher rail voltages as the input voltage is increased. The 21844, 2184, 2110, 2113 all do the same tasks just in different ways. I find the 21844s series of IC's run quite hot compared to the 2184 DIP IC. The 260n's ran hot because I did not change any of the resistor values for the pulldowns or the gates which lead to the signals overlapping causing them to heat up.
***TIP*** When cleaning Boards, try a spritz of IPA on the board where flux is to be removed, Initially Brush with a toothbrush to loosen stubborn flux and once flux is dislodged place a sheet of paper towel down over area and repeat brushing the area using the same toothbrush, this method takes a 1/4 of the time using a cotton tip..
If the customer is not local, Ellensburg Amplifier Repair & Service is a mail-in repair business. www.ellensburgamplifier.com/request-a-quote if you have an amplifier in need of repair or if you want general information www.ellensburgamplifier.com and the FAQ page are a great start.
I think I'm a maniacal to put resistor in all same direction because i want a good visual impact for my repair, but now I know I'm not only 😅. Great stuff
A repair that is appealing makes for a satisfied customer. Proper placement shows that care was involved.
We think the same, passion and care for customers
Man that is awesome. I hope you can get me up and running again....
These amplifiers are easy to get back up and running for sure.
I just realized that you sent out some amplifiers today. Should be no issues but do keep in mind when I mentioned the issues about repairing the MRD board.
@@ellensburgamplifier .. I remember. Hopefully you can work your magic as usual...thanks a million
Excuse my ignorance, but I've never heard of that desoldering tool. Could you specify what kind of hako that is?
That would be the Hakko 808. It has since been discontinued but you can get the Hakko FR-301 which is a single pump brother of the 808.
Great video.Hey how can I get intouch with you i have alot of Amplifier that you could buy to do your videos
Please feel free to email me directly ellensburg.amplifier@charter.net
Good day Bro,what causes power supply mosfets to continuously blow out in a car, class AB amplifier?
There are a few reasons. A stressed power supply, faulty drive transistors, bad gate drive, bad RC snubber. Anything that will cause an excessive load or short across the power supply will cause the FET's to fail. I typically see shorted outputs with failing power supplies here on the bench.
What is the output voltage of this amp on 2 ohm?
Can it support 1.5 ohm?
Whats about ir2184? Is it good or 2110?
And sir last question i can't understand why 260n was gone hot?
Thank you for the comment. I will do my best to help answer the questions. The output voltage is roughly 32 volts at 2 ohms (not clipping) and as low as 25v down to 1 ohm into clipping. This is at 12v input. You will get higher rail voltages as the input voltage is increased. The 21844, 2184, 2110, 2113 all do the same tasks just in different ways. I find the 21844s series of IC's run quite hot compared to the 2184 DIP IC. The 260n's ran hot because I did not change any of the resistor values for the pulldowns or the gates which lead to the signals overlapping causing them to heat up.
Hi i have a similar amp but no switching on output
Its on the driver board as i replaced driver board in the amp and amp works fine
Sounds like the 21844 needs to be replaced. Other SMD components may also have failed such as the TL072, LM311 etc.
@@ellensburgamplifier ive replaced all that still no switching and there is no switching on pin 1 if im correct of the 21844 that is my issue
@@aqeebismail8090 Sorry I can't remember if you have a scope or not?
@@ellensburgamplifier yes i do have two
***TIP***
When cleaning Boards, try a spritz of IPA on the board where flux is to be removed,
Initially Brush with a toothbrush to loosen stubborn flux and once flux is dislodged
place a sheet of paper towel down over area and repeat brushing the area using
the same toothbrush, this method takes a 1/4 of the time using a cotton tip..
**ADDENDUM**
🐨 I subbed, I liked 👉👍👈
@@KorAllRBare Excellent thank you!
Will you repair amps of i send through the mail
If the customer is not local, Ellensburg Amplifier Repair & Service is a mail-in repair business. www.ellensburgamplifier.com/request-a-quote if you have an amplifier in need of repair or if you want general information www.ellensburgamplifier.com and the FAQ page are a great start.
✌👀👍
Thank you for your support!