"Refurbished" car amplifier, hack job much? - Page 1
Forum section: electronics / beginners

author: AmmoJammo
author_rank: Frequent Contributor
timestamp: December 11, 2013, 11:55:33 pm
content: Some poor guy bought this as refurbished...Ah, what did they use to refurbish it? a burning stick?So, one fan has been disconnected for some reason?Oh, and so has the other?Oh... I see...

author: dr.diesel
author_rank: Super Contributor
timestamp: December 12, 2013, 12:21:35 am
content: Hey, I recognize that work, it was done by W0AJA.

author: headwes
author_rank: Newbie
timestamp: December 12, 2013, 12:22:04 am
content: Seems about right for a car audio amp rated at 8000 watts RMS. The buyer probably paid less than it would cost to wire that thing for the 600+ amps it would need to perform as advertised.

author: TheBay
author_rank: Unknown
timestamp: December 12, 2013, 12:31:21 am
content: What amplifier is this, some shoddy work!! Love the international rectifier mosfet/driver. I can see the factory that fab these from my house

author: VintageTekFan
author_rank: Regular Contributor
timestamp: December 12, 2013, 03:59:15 am
content: Quote from: dr.diesel on December 12, 2013, 12:21:35 am

author: SeanB
author_rank: Super Contributor
timestamp: December 12, 2013, 05:10:44 am
content: Fan disconnected because it was noisy. Important thing was did it blow up when plugged in? There might have been enough left to operate somewhat, even with half the power inverter stages blown out and with all the damaged and blown traces these disconnecting the shorted silicon.

author: Shock
author_rank: Super Contributor
timestamp: December 12, 2013, 05:50:18 am
content: The Torx screws are clearly to blame, it just encourages them.The amp is not that old. Could have almost been a warranty repair.

author: calexanian
author_rank: Super Contributor
timestamp: December 12, 2013, 07:01:55 am
content: That must have made a nice loud pop sizzle an would have smelled great!

author: amyk
author_rank: Super Contributor
timestamp: December 12, 2013, 12:09:49 pm
content: FET replacement improvisation...?

author: ElektroQuark
author_rank: Unknown
timestamp: December 12, 2013, 02:41:00 pm
content: Ouch, poor amplifier...

author: garak
author_rank: Contributor
timestamp: December 12, 2013, 02:53:44 pm
content: I've seen some bad refurbs in my time, but this one takes the biscuit. At least the ones I saw WORKED.That's some shonky business right there.

author: PA0PBZ
author_rank: Super Contributor
timestamp: December 12, 2013, 03:06:29 pm
content: There's really only one thing left to do: a decent funeral

author: AmmoJammo
author_rank: Frequent Contributor
timestamp: December 12, 2013, 09:28:58 pm
content: This was a Taramps hd8000, they're a Brazilian made amp, high power for their size, using some weird technology that I'm not really sure about :pMy comment was that it would have worked better before this guy tried to fix it, and that the quote to re-repair it would be an extra $200 because there would now be a few more hours rework due to the hacked up board!

author: rsjsouza
author_rank: Super Contributor
timestamp: December 13, 2013, 04:00:58 pm
content: I don't know this particular brand, thus I had to look it up. Specs are atthis page, and it says it draws a peak of 817A when outputting a 1kHz sinewave!A review of a smaller unit ishere.Some Brazilian manufacturers produce good and sturdy high powered amps, mostly due to "Carnaval" and something we call "Trio elétrico" (Electric trio): a truck-mounted assembly of diesel generators, amplifiers, mixers, lighting systems and a stage that accommodates a band and all staff during several days while the "Carnaval" lasts.

author: ConKbot
author_rank: Super Contributor
timestamp: December 13, 2013, 06:45:52 pm
content: Quote from: PA0PBZ on December 12, 2013, 03:06:29 pmfixed that for you